2015北京网络赛 G Boxes BFS+打表

G Boxes

题意:n个位置摆有n个箱子,每次移动只能把相邻的垒起来,且上面的必须小于下面的。求摆成升序需要移动多少步。

思路:这里的n很小,只有7。但是bfs最快的情况需要2s左右,所以就打表了。

     诡异的是n = 6时居然都跑不出来都超时,连6也打了个表。

  1 #include <iostream>
  2 #include <cstdio>
  3 #include <fstream>
  4 #include <algorithm>
  5 #include <cmath>
  6 #include <deque>
  7 #include <vector>
  8 #include <queue>
  9 #include <string>
 10 #include <cstring>
 11 #include <map>
 12 #include <stack>
 13 #include <set>
 14 #define LL long long
 15 #define eps 1e-8
 16 #define INF 0x3f3f3f3f
 17 #define MAXN 10005
 18 using namespace std;
 19 const int ten[10] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000 };
 20 const int fact[10] = { 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880 };
 21 const int u6[730] = { 0, 12, 4, 8, 16, 18, 4, 10, 6, 10, 12, 14, 8, 12, 10, 12, 14, 16, 18, 18, 18, 18, 18, 22, 4, 12, 8, 12, 14, 16, 6, 12, 8, 12, 14, 16, 10, 14, 12, 14, 16, 18, 16, 18, 18, 20, 20, 22, 8, 14, 10, 14, 16, 18, 10, 16, 12, 14, 16, 18, 12, 16, 14, 16, 18, 20, 18, 20, 20, 20, 22, 24, 12, 16, 14, 16, 18, 20, 14, 18, 16, 18, 20, 22, 16, 18, 18, 20, 20, 22, 20, 22, 22, 24, 24, 26, 22, 22, 22, 22, 22, 26, 22, 24, 22, 24, 24, 26, 22, 24, 24, 24, 26, 28, 24, 26, 26, 28, 28, 32, 4, 14, 8, 12, 16, 18, 8, 14, 10, 14, 16, 18, 12, 16, 14, 16, 18, 20, 18, 20, 20, 22, 22, 24, 6, 14, 10, 14, 16, 18, 8, 14, 10, 14, 16, 18, 12, 16, 14, 16, 18, 20, 18, 20, 20, 22, 22, 24, 10, 16, 12, 16, 18, 20, 12, 18, 14, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 22, 24, 26, 14, 18, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 18, 20, 20, 22, 22, 24, 22, 24, 24, 26, 26, 28, 20, 22, 22, 24, 24, 26, 22, 24, 24, 26, 26, 28, 24, 26, 26, 26, 28, 30, 26, 28, 28, 30, 30, 32, 8, 16, 12, 16, 18, 20, 10, 16, 12, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 24, 24, 26, 10, 18, 14, 18, 20, 22, 12, 16, 14, 16, 18, 20, 16, 18, 18, 20, 20, 22, 20, 22, 22, 24, 24, 26, 12, 18, 14, 18, 20, 22, 14, 20, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 24, 26, 28, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 22, 24, 20, 22, 22, 24, 24, 26, 24, 26, 26, 26, 28, 30, 22, 24, 24, 26, 26, 28, 24, 26, 24, 26, 26, 28, 26, 28, 28, 28, 30, 30, 28, 30, 30, 30, 32, 34, 12, 18, 14, 18, 20, 22, 14, 20, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 24, 26, 28, 14, 20, 16, 20, 22, 24, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 24, 26, 24, 26, 26, 26, 28, 30, 16, 22, 18, 20, 22, 24, 18, 24, 20, 22, 24, 26, 20, 22, 22, 22, 24, 26, 24, 26, 26, 26, 28, 30, 18, 22, 20, 22, 24, 26, 20, 24, 22, 24, 24, 26, 22, 24, 24, 26, 26, 28, 26, 28, 28, 28, 30, 32, 24, 26, 26, 26, 28, 30, 26, 28, 28, 28, 30, 32, 28, 28, 30, 30, 30, 32, 30, 32, 32, 32, 34, 36, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 24, 26, 20, 22, 22, 24, 24, 26, 24, 26, 26, 28, 28, 30, 18, 22, 20, 22, 24, 26, 20, 24, 22, 24, 26, 28, 22, 24, 24, 26, 26, 28, 26, 28, 28, 30, 30, 32, 20, 24, 22, 24, 26, 28, 22, 26, 24, 26, 26, 28, 24, 26, 26, 26, 28, 30, 28, 30, 30, 30, 32, 34, 22, 24, 24, 26, 26, 28, 24, 26, 26, 28, 28, 30, 26, 28, 28, 30, 30, 32, 28, 30, 30, 30, 32, 34, 26, 28, 28, 30, 30, 32, 28, 30, 30, 32, 32, 34, 30, 32, 32, 32, 34, 34, 32, 34, 34, 34, 36, 38, 26, 26, 26, 26, 26, 30, 26, 28, 26, 28, 28, 30, 26, 28, 28, 28, 30, 32, 28, 30, 30, 32, 32, 36, 26, 28, 28, 28, 28, 32, 26, 28, 28, 30, 30, 32, 28, 30, 30, 30, 32, 34, 30, 32, 32, 34, 34, 36, 26, 28, 28, 30, 30, 32, 28, 30, 28, 30, 30, 32, 30, 30, 32, 32, 32, 34, 32, 34, 34, 34, 36, 38, 28, 30, 30, 30, 32, 34, 30, 32, 32, 32, 34, 36, 32, 32, 34, 34, 34, 36, 34, 36, 36, 36, 38, 38, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 38, 36, 38, 38, 38, 40, 42 };
 22 const int u7[5045] = { 0, 12, 4, 8, 16, 18, 4, 10, 6, 10, 12, 14, 8, 12, 10, 12, 14, 16, 18, 18, 18, 18, 18, 22, 4, 12, 8, 12, 14, 16, 6, 12, 8, 12, 14, 16, 10, 14, 12, 14, 16, 18, 16, 18, 18, 20, 20, 22, 8, 14, 10, 14, 16, 18, 10, 16, 12, 14, 16, 18, 12, 16, 14, 16, 18, 20, 18, 20, 20, 20, 22, 24, 12, 16, 14, 16, 18, 20, 14, 18, 16, 18, 20, 22, 16, 18, 18, 20, 20, 22, 20, 22, 22, 24, 24, 26, 22, 22, 22, 22, 22, 26, 22, 24, 22, 24, 24, 26, 22, 24, 24, 24, 26, 28, 24, 26, 26, 28, 28, 32, 4, 14, 8, 12, 16, 18, 8, 14, 10, 14, 16, 18, 12, 16, 14, 16, 18, 20, 18, 20, 20, 22, 22, 24, 6, 14, 10, 14, 16, 18, 8, 14, 10, 14, 16, 18, 12, 16, 14, 16, 18, 20, 18, 20, 20, 22, 22, 24, 10, 16, 12, 16, 18, 20, 12, 18, 14, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 22, 24, 26, 14, 18, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 18, 20, 20, 22, 22, 24, 22, 24, 24, 26, 26, 28, 20, 22, 22, 24, 24, 26, 22, 24, 24, 26, 26, 28, 24, 26, 26, 26, 28, 30, 26, 28, 28, 30, 30, 32, 8, 16, 12, 16, 18, 20, 10, 16, 12, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 24, 24, 26, 10, 18, 14, 18, 20, 22, 12, 16, 14, 16, 18, 20, 16, 18, 18, 20, 20, 22, 20, 22, 22, 24, 24, 26, 12, 18, 14, 18, 20, 22, 14, 20, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 24, 26, 28, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 22, 24, 20, 22, 22, 24, 24, 26, 24, 26, 26, 26, 28, 30, 22, 24, 24, 26, 26, 28, 24, 26, 24, 26, 26, 28, 26, 28, 28, 28, 30, 30, 28, 30, 30, 30, 32, 34, 12, 18, 14, 18, 20, 22, 14, 20, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 24, 26, 28, 14, 20, 16, 20, 22, 24, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 24, 26, 24, 26, 26, 26, 28, 30, 16, 22, 18, 20, 22, 24, 18, 24, 20, 22, 24, 26, 20, 22, 22, 22, 24, 26, 24, 26, 26, 26, 28, 30, 18, 22, 20, 22, 24, 26, 20, 24, 22, 24, 24, 26, 22, 24, 24, 26, 26, 28, 26, 28, 28, 28, 30, 32, 24, 26, 26, 26, 28, 30, 26, 28, 28, 28, 30, 32, 28, 28, 30, 30, 30, 32, 30, 32, 32, 32, 34, 36, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 24, 26, 20, 22, 22, 24, 24, 26, 24, 26, 26, 28, 28, 30, 18, 22, 20, 22, 24, 26, 20, 24, 22, 24, 26, 28, 22, 24, 24, 26, 26, 28, 26, 28, 28, 30, 30, 32, 20, 24, 22, 24, 26, 28, 22, 26, 24, 26, 26, 28, 24, 26, 26, 26, 28, 30, 28, 30, 30, 30, 32, 34, 22, 24, 24, 26, 26, 28, 24, 26, 26, 28, 28, 30, 26, 28, 28, 30, 30, 32, 28, 30, 30, 30, 32, 34, 26, 28, 28, 30, 30, 32, 28, 30, 30, 32, 32, 34, 30, 32, 32, 32, 34, 34, 32, 34, 34, 34, 36, 38, 26, 26, 26, 26, 26, 30, 26, 28, 26, 28, 28, 30, 26, 28, 28, 28, 30, 32, 28, 30, 30, 32, 32, 36, 26, 28, 28, 28, 28, 32, 26, 28, 28, 30, 30, 32, 28, 30, 30, 30, 32, 34, 30, 32, 32, 34, 34, 36, 26, 28, 28, 30, 30, 32, 28, 30, 28, 30, 30, 32, 30, 30, 32, 32, 32, 34, 32, 34, 34, 34, 36, 38, 28, 30, 30, 30, 32, 34, 30, 32, 32, 32, 34, 36, 32, 32, 34, 34, 34, 36, 34, 36, 36, 36, 38, 38, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 38, 36, 38, 38, 38, 40, 42, 4, 16, 8, 12, 18, 20, 8, 14, 10, 14, 16, 18, 12, 16, 14, 16, 18, 20, 20, 22, 22, 22, 22, 26, 8, 16, 12, 16, 18, 20, 10, 16, 12, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 24, 24, 26, 12, 18, 14, 18, 20, 22, 14, 20, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 24, 26, 28, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 24, 26, 20, 22, 22, 24, 24, 26, 24, 26, 26, 28, 28, 30, 22, 24, 24, 26, 26, 28, 24, 26, 26, 28, 28, 30, 26, 28, 28, 28, 30, 32, 28, 30, 30, 32, 32, 34, 6, 16, 10, 14, 18, 20, 10, 16, 12, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 24, 24, 26, 8, 16, 12, 16, 18, 20, 10, 16, 12, 16, 18, 20, 14, 18, 16, 18, 20, 22, 20, 22, 22, 24, 24, 26, 12, 18, 14, 18, 20, 22, 14, 20, 16, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 24, 26, 28, 16, 20, 18, 20, 22, 24, 18, 22, 20, 22, 24, 26, 20, 22, 22, 24, 24, 26, 24, 26, 26, 28, 28, 30, 22, 24, 24, 26, 26, 28, 24, 26, 26, 28, 28, 30, 26, 28, 28, 28, 30, 32, 28, 30, 30, 32, 32, 34, 10, 18, 14, 18, 20, 22, 12, 18, 14, 18, 20, 22, 16, 20, 18, 20, 22, 24, 22, 24, 24, 26, 26, 28, 12, 20, 16, 20, 22, 24, 14, 18, 16, 18, 20, 22, 18, 20, 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30, 32, 32, 34, 30, 32, 30, 32, 32, 34, 32, 34, 34, 34, 36, 36, 34, 36, 36, 36, 38, 40, 18, 24, 20, 24, 26, 28, 20, 26, 22, 24, 26, 28, 22, 26, 24, 26, 28, 30, 28, 30, 30, 30, 32, 34, 20, 26, 22, 26, 28, 30, 22, 26, 24, 26, 28, 30, 24, 26, 26, 28, 28, 30, 28, 30, 30, 32, 32, 34, 22, 28, 24, 26, 28, 30, 24, 30, 26, 28, 30, 32, 26, 28, 28, 28, 30, 32, 30, 32, 32, 32, 34, 36, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 30, 32, 28, 30, 30, 32, 32, 32, 32, 34, 34, 34, 36, 36, 30, 32, 32, 32, 34, 36, 32, 34, 32, 34, 34, 36, 34, 34, 36, 36, 36, 36, 36, 38, 38, 38, 40, 40, 22, 26, 24, 26, 28, 30, 24, 28, 26, 28, 28, 30, 26, 28, 28, 30, 30, 32, 30, 32, 32, 32, 34, 36, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 30, 32, 28, 30, 30, 32, 32, 34, 32, 34, 34, 34, 36, 38, 26, 30, 28, 30, 30, 32, 28, 32, 30, 32, 32, 34, 30, 32, 32, 32, 34, 34, 32, 34, 34, 34, 36, 38, 28, 30, 30, 32, 32, 34, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 36, 34, 36, 36, 36, 38, 40, 32, 34, 34, 34, 36, 38, 34, 36, 34, 36, 38, 38, 36, 36, 38, 38, 38, 38, 38, 40, 40, 40, 42, 42, 28, 30, 30, 32, 32, 34, 30, 32, 30, 32, 32, 34, 32, 34, 34, 34, 36, 36, 34, 36, 36, 36, 38, 40, 30, 32, 32, 34, 34, 36, 32, 34, 32, 34, 34, 36, 34, 36, 36, 36, 38, 38, 36, 38, 38, 38, 40, 42, 32, 34, 32, 34, 34, 36, 34, 36, 34, 36, 36, 38, 34, 36, 36, 36, 38, 38, 36, 38, 38, 38, 40, 42, 34, 36, 36, 36, 38, 38, 36, 38, 36, 38, 38, 40, 38, 38, 40, 40, 40, 40, 40, 40, 42, 40, 42, 44, 36, 38, 38, 38, 40, 42, 38, 40, 38, 40, 42, 42, 40, 40, 42, 42, 42, 42, 42, 44, 44, 44, 46, 46, 16, 22, 18, 22, 24, 26, 18, 24, 20, 22, 24, 26, 20, 24, 22, 24, 26, 28, 26, 28, 28, 28, 30, 32, 18, 24, 20, 24, 26, 28, 20, 24, 22, 24, 26, 28, 22, 26, 24, 26, 28, 30, 28, 30, 30, 30, 32, 34, 20, 26, 22, 24, 26, 28, 22, 28, 24, 26, 28, 30, 24, 26, 26, 26, 28, 30, 28, 30, 30, 30, 32, 34, 22, 26, 24, 26, 28, 30, 24, 28, 26, 28, 28, 30, 26, 28, 28, 30, 30, 32, 30, 32, 32, 32, 34, 36, 28, 30, 30, 30, 32, 34, 30, 32, 32, 32, 34, 36, 32, 32, 34, 34, 34, 36, 34, 36, 36, 36, 38, 40, 18, 24, 20, 24, 26, 28, 20, 26, 22, 24, 26, 28, 22, 26, 24, 26, 28, 30, 28, 30, 30, 30, 32, 34, 20, 26, 22, 26, 28, 30, 22, 26, 24, 26, 28, 30, 24, 28, 26, 28, 30, 32, 30, 32, 32, 32, 34, 36, 22, 28, 24, 26, 28, 30, 24, 28, 26, 28, 30, 32, 26, 28, 28, 28, 30, 32, 30, 32, 32, 32, 34, 36, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 30, 32, 28, 30, 30, 32, 32, 34, 32, 34, 34, 34, 36, 38, 30, 32, 32, 32, 34, 36, 32, 34, 34, 34, 36, 38, 34, 34, 36, 36, 36, 38, 36, 38, 38, 38, 40, 42, 20, 26, 22, 26, 28, 30, 22, 26, 24, 26, 28, 30, 24, 28, 26, 28, 30, 32, 30, 32, 32, 32, 34, 36, 22, 28, 24, 28, 30, 32, 24, 28, 26, 28, 30, 32, 26, 28, 28, 30, 30, 32, 30, 32, 32, 34, 34, 36, 24, 28, 26, 28, 30, 32, 26, 30, 26, 28, 30, 32, 28, 30, 28, 30, 32, 32, 32, 34, 34, 34, 36, 38, 26, 30, 28, 30, 30, 32, 28, 32, 28, 30, 32, 34, 30, 32, 32, 32, 34, 34, 32, 34, 34, 36, 36, 38, 32, 34, 34, 34, 36, 38, 34, 36, 34, 36, 36, 38, 36, 36, 38, 38, 38, 40, 38, 40, 40, 40, 42, 44, 22, 28, 24, 26, 28, 30, 24, 30, 26, 28, 30, 32, 26, 28, 28, 28, 30, 32, 30, 32, 32, 32, 34, 36, 24, 30, 26, 28, 30, 32, 26, 30, 28, 30, 32, 34, 28, 30, 30, 30, 32, 34, 32, 34, 34, 34, 36, 38, 26, 32, 28, 30, 32, 34, 28, 34, 30, 32, 34, 36, 30, 30, 32, 32, 32, 34, 34, 34, 36, 36, 36, 38, 28, 30, 30, 30, 32, 34, 30, 32, 30, 32, 32, 34, 32, 32, 34, 34, 34, 34, 34, 36, 36, 36, 38, 38, 32, 34, 34, 34, 36, 38, 34, 36, 34, 36, 36, 38, 36, 36, 38, 38, 38, 40, 38, 40, 40, 40, 42, 44, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 30, 32, 28, 30, 30, 32, 32, 34, 32, 34, 34, 34, 36, 38, 26, 30, 28, 30, 32, 34, 28, 30, 30, 32, 32, 34, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 28, 32, 30, 32, 32, 34, 30, 34, 32, 34, 34, 36, 32, 34, 34, 34, 36, 36, 34, 36, 36, 36, 38, 40, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 38, 38, 38, 36, 38, 38, 38, 40, 42, 34, 36, 36, 36, 38, 40, 36, 38, 36, 38, 38, 40, 38, 38, 40, 40, 40, 42, 40, 42, 42, 42, 44, 44, 30, 32, 32, 32, 34, 36, 32, 34, 34, 34, 36, 38, 34, 34, 36, 36, 36, 38, 36, 38, 38, 38, 40, 42, 32, 34, 34, 34, 36, 38, 34, 36, 36, 36, 38, 40, 36, 36, 38, 38, 38, 40, 38, 40, 40, 40, 42, 44, 34, 36, 36, 36, 38, 40, 36, 38, 36, 38, 38, 40, 38, 38, 38, 40, 40, 42, 40, 40, 40, 42, 42, 44, 36, 36, 38, 38, 38, 40, 38, 38, 38, 40, 40, 42, 40, 40, 42, 42, 42, 42, 40, 42, 42, 42, 44, 46, 38, 40, 40, 40, 42, 44, 40, 42, 40, 42, 42, 44, 42, 42, 44, 44, 44, 46, 44, 46, 46, 46, 48, 48, 20, 24, 22, 24, 26, 28, 22, 26, 24, 26, 28, 30, 24, 26, 26, 28, 28, 30, 28, 30, 30, 32, 32, 34, 22, 26, 24, 26, 28, 30, 24, 28, 26, 28, 30, 32, 26, 28, 28, 30, 30, 32, 30, 32, 32, 34, 34, 36, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 30, 32, 28, 30, 30, 30, 32, 34, 32, 34, 34, 34, 36, 38, 26, 28, 28, 30, 30, 32, 28, 30, 30, 32, 32, 34, 30, 32, 32, 34, 34, 36, 32, 34, 34, 34, 36, 38, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 38, 36, 38, 38, 38, 40, 42, 22, 26, 24, 26, 28, 30, 24, 28, 26, 28, 30, 32, 26, 28, 28, 30, 30, 32, 30, 32, 32, 34, 34, 36, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 32, 34, 28, 30, 30, 32, 32, 34, 32, 34, 34, 36, 36, 38, 26, 30, 28, 30, 32, 34, 28, 32, 30, 32, 32, 34, 30, 32, 32, 32, 34, 36, 34, 36, 36, 36, 38, 40, 28, 30, 30, 32, 32, 34, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 40, 32, 34, 34, 36, 36, 38, 34, 36, 36, 38, 38, 40, 36, 38, 38, 38, 40, 40, 38, 40, 40, 40, 42, 44, 24, 28, 26, 28, 30, 32, 26, 30, 28, 30, 32, 34, 28, 30, 30, 32, 32, 34, 32, 34, 34, 36, 36, 38, 26, 30, 28, 30, 32, 34, 28, 30, 30, 32, 32, 34, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 28, 32, 30, 32, 32, 34, 30, 34, 30, 32, 34, 36, 32, 34, 32, 34, 36, 36, 34, 36, 36, 38, 38, 40, 30, 32, 32, 34, 34, 36, 32, 34, 32, 34, 34, 36, 34, 36, 36, 36, 38, 38, 36, 38, 38, 38, 40, 42, 34, 36, 36, 38, 38, 40, 36, 38, 36, 38, 38, 40, 38, 40, 40, 40, 42, 42, 40, 42, 42, 42, 44, 46, 26, 30, 28, 30, 32, 34, 28, 32, 30, 32, 32, 34, 30, 32, 32, 32, 34, 36, 34, 36, 36, 36, 38, 40, 28, 32, 30, 32, 34, 36, 30, 34, 32, 34, 34, 36, 32, 34, 34, 34, 36, 38, 36, 38, 38, 38, 40, 42, 30, 34, 32, 34, 34, 36, 32, 36, 34, 36, 36, 38, 34, 34, 36, 36, 36, 38, 36, 38, 38, 38, 40, 42, 32, 34, 34, 34, 36, 38, 34, 36, 34, 36, 36, 38, 36, 36, 38, 38, 38, 38, 38, 40, 40, 40, 42, 42, 36, 38, 38, 38, 40, 40, 38, 40, 38, 40, 40, 42, 40, 40, 40, 42, 42, 42, 42, 42, 44, 44, 44, 46, 28, 30, 30, 32, 32, 34, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 40, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 38, 38, 40, 36, 38, 38, 38, 40, 42, 32, 34, 34, 36, 36, 38, 34, 36, 36, 38, 38, 40, 36, 38, 38, 38, 40, 40, 38, 38, 40, 40, 40, 42, 34, 36, 36, 38, 38, 40, 36, 38, 38, 40, 40, 42, 38, 40, 40, 42, 42, 42, 40, 42, 42, 42, 44, 46, 36, 38, 38, 38, 40, 42, 38, 40, 38, 40, 40, 42, 40, 40, 42, 42, 42, 44, 42, 44, 44, 44, 46, 48, 32, 34, 34, 36, 36, 38, 34, 36, 36, 38, 38, 40, 36, 38, 38, 38, 40, 40, 38, 40, 40, 40, 42, 44, 34, 36, 36, 38, 38, 40, 36, 38, 38, 40, 40, 42, 38, 40, 40, 40, 42, 42, 40, 42, 42, 42, 44, 46, 36, 38, 38, 40, 40, 42, 38, 40, 38, 40, 40, 42, 40, 40, 40, 42, 42, 44, 42, 42, 42, 44, 44, 46, 38, 40, 40, 40, 42, 42, 40, 42, 40, 42, 44, 44, 42, 42, 44, 44, 44, 44, 44, 44, 46, 44, 46, 48, 40, 42, 42, 42, 44, 46, 42, 44, 42, 44, 44, 46, 44, 44, 46, 46, 46, 48, 46, 48, 48, 48, 50, 52, 30, 30, 30, 30, 30, 34, 30, 32, 30, 32, 32, 34, 30, 32, 32, 32, 34, 36, 32, 34, 34, 36, 36, 40, 30, 32, 32, 32, 32, 36, 30, 32, 32, 34, 34, 36, 32, 34, 34, 34, 36, 38, 34, 36, 36, 38, 38, 40, 30, 32, 32, 34, 34, 36, 32, 34, 32, 34, 34, 36, 34, 34, 36, 36, 36, 38, 36, 38, 38, 38, 40, 42, 32, 34, 34, 34, 36, 38, 34, 36, 36, 36, 38, 40, 36, 36, 38, 38, 38, 40, 38, 40, 40, 40, 42, 42, 34, 36, 36, 38, 38, 40, 36, 38, 38, 40, 40, 42, 38, 40, 40, 40, 42, 42, 40, 42, 42, 42, 44, 46, 30, 32, 32, 32, 32, 36, 32, 34, 32, 34, 34, 36, 32, 34, 34, 34, 36, 38, 34, 36, 36, 38, 38, 42, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 40, 36, 38, 38, 40, 40, 42, 32, 34, 34, 36, 36, 38, 34, 36, 34, 36, 36, 38, 36, 36, 38, 38, 38, 40, 38, 40, 40, 40, 42, 44, 34, 36, 36, 36, 38, 40, 36, 38, 38, 38, 40, 42, 38, 38, 40, 40, 40, 42, 40, 42, 42, 42, 44, 44, 36, 38, 38, 40, 40, 42, 38, 40, 40, 42, 42, 44, 40, 42, 42, 42, 44, 44, 42, 44, 44, 44, 46, 48, 30, 32, 32, 34, 34, 36, 32, 34, 34, 36, 36, 38, 34, 36, 36, 36, 38, 40, 36, 38, 38, 40, 40, 42, 32, 34, 34, 36, 36, 38, 32, 34, 34, 36, 36, 38, 34, 36, 36, 38, 38, 40, 36, 38, 38, 40, 40, 42, 34, 36, 34, 36, 36, 38, 36, 38, 36, 38, 38, 40, 36, 38, 38, 40, 40, 42, 38, 40, 40, 42, 42, 44, 36, 38, 38, 38, 40, 42, 38, 40, 38, 40, 40, 42, 40, 40, 42, 42, 42, 44, 42, 44, 42, 44, 46, 46, 38, 40, 40, 42, 42, 44, 40, 42, 40, 42, 42, 44, 42, 44, 44, 44, 46, 46, 44, 46, 46, 46, 48, 50, 32, 34, 34, 36, 36, 38, 34, 36, 34, 36, 36, 38, 36, 36, 38, 38, 38, 40, 38, 40, 40, 40, 42, 44, 34, 36, 36, 38, 38, 40, 36, 38, 36, 38, 38, 40, 38, 38, 40, 40, 40, 42, 40, 42, 42, 42, 44, 46, 36, 38, 36, 38, 38, 40, 38, 40, 38, 40, 40, 42, 38, 40, 40, 40, 42, 42, 40, 42, 42, 42, 44, 46, 38, 38, 40, 40, 40, 42, 40, 40, 40, 42, 40, 42, 42, 42, 42, 44, 42, 44, 42, 44, 44, 44, 46, 46, 40, 42, 42, 42, 44, 44, 42, 44, 42, 44, 44, 46, 44, 44, 44, 46, 46, 46, 46, 46, 48, 48, 48, 50, 34, 36, 36, 36, 38, 40, 36, 38, 38, 38, 40, 42, 38, 38, 40, 40, 40, 42, 40, 42, 42, 42, 44, 44, 36, 38, 38, 38, 40, 42, 38, 40, 40, 40, 42, 44, 40, 40, 42, 42, 42, 44, 42, 44, 44, 44, 46, 46, 38, 40, 40, 40, 42, 44, 40, 42, 40, 42, 42, 44, 42, 42, 42, 44, 44, 46, 44, 44, 44, 46, 46, 48, 40, 40, 42, 42, 42, 44, 42, 42, 42, 44, 44, 46, 44, 44, 46, 46, 46, 46, 44, 46, 46, 46, 48, 50, 42, 44, 44, 44, 46, 46, 44, 46, 44, 46, 46, 48, 46, 46, 46, 48, 48, 48, 48, 48, 50, 48, 50, 52, 36, 38, 38, 40, 40, 42, 38, 40, 40, 42, 42, 44, 40, 42, 42, 42, 44, 44, 42, 44, 44, 44, 46, 48, 38, 40, 40, 42, 42, 44, 40, 42, 42, 44, 44, 46, 42, 44, 44, 44, 46, 46, 44, 46, 46, 46, 48, 50, 40, 42, 42, 44, 44, 46, 42, 44, 42, 44, 44, 46, 44, 44, 44, 46, 46, 48, 46, 46, 46, 48, 48, 50, 42, 44, 44, 44, 46, 46, 44, 46, 44, 46, 48, 48, 46, 46, 48, 48, 48, 48, 48, 48, 50, 48, 50, 52, 44, 46, 46, 46, 48, 50, 46, 48, 46, 48, 48, 50, 48, 48, 50, 50, 50, 52, 50, 52, 52, 52, 54, 56 };
 23 struct Node{
 24     int x, pos;
 25 };
 26 Node a[10];
 27 bool compare(Node a, Node b){
 28     return a.x < b.x;
 29 }
 30 struct BOX{
 31     int num[10];
 32     BOX(){
 33         num[0] = 0;
 34     }
 35 };
 36 struct NODE{
 37     int cnt;
 38     BOX box[10];
 39 };
 40 int b[10], n, m;
 41 bool vis[8000005];
 42 int turn(NODE s){
 43     int f = 0;
 44     for (int i = 1; i <= n; i++){
 45         for (int j = 1; j <= s.box[i].num[0]; j++){
 46             f += ten[s.box[i].num[j] - 1] * i;
 47         }
 48     }
 49     return f;
 50 }
 51 int res;
 52 int bfs(){
 53     NODE s;
 54     s.cnt = 0;
 55     for (int i = 1; i <= n; i++){
 56         s.box[i].num[0] = 1;
 57         s.box[i].num[1] = b[i];
 58     }
 59     memset(vis, 0, sizeof(vis));
 60     int f = turn(s);
 61     if (f == res){
 62         return 0;
 63     }
 64     vis[f] = true;
 65     queue<NODE> Q;
 66     Q.push(s);
 67     NODE t;
 68     while (!Q.empty()){
 69         s = Q.front();
 70         Q.pop();
 71         for (int i = 1; i <= n; i++){
 72             int m = s.box[i].num[0];
 73             if (i != n && m != 0){
 74                 if (s.box[i + 1].num[0] == 0 || (s.box[i].num[m] < s.box[i + 1].num[s.box[i + 1].num[0]])){
 75                     t = s;
 76                     t.box[i + 1].num[0]++;
 77                     t.box[i + 1].num[t.box[i + 1].num[0]] = t.box[i].num[m];
 78                     t.box[i].num[0]--;
 79                     int f = turn(t);
 80                     if (!vis[f]){
 81                         if (f == res) return t.cnt + 1;
 82                         t.cnt++;
 83                         Q.push(t);
 84                         vis[f] = true;
 85                     }
 86                 }
 87             }
 88             if (i != 1 && m != 0){
 89                 if (s.box[i - 1].num[0] == 0 || (s.box[i].num[m] < s.box[i - 1].num[s.box[i - 1].num[0]])){
 90                     t = s;
 91                     t.box[i - 1].num[0]++;
 92                     t.box[i - 1].num[t.box[i - 1].num[0]] = t.box[i].num[m];
 93                     t.box[i].num[0]--;
 94                     int f = turn(t);
 95                     if (!vis[f]){
 96                         if (f == res) return t.cnt + 1;
 97                         t.cnt++;
 98                         Q.push(t);
 99                         vis[f] = true;
100                     }
101                 }
102             }
103         }
104     }
105     return -1;
106 }
107 
108 int r[10];
109 bool mp[10];
110 int cnt = 0;
111 void solve(){
112     for (int i = 1; i <= n; i++){
113         a[i].x = r[i];
114         a[i].pos = i;
115     }
116     sort(a + 1, a + n + 1, compare);
117     for (int i = 1; i <= n; i++){
118         b[i] = a[i].pos;
119     }
120     int ans = bfs();
121     printf("%d, ", ans);
122     cnt++;
123 }
124 
125 void dfs(int x){
126     if (x > n){
127         solve();
128         return;
129     }
130     for (int i = 1; i <= n; i++){
131         if (mp[i]) continue;
132         r[x] = i;
133         mp[i] = true;
134         dfs(x + 1);
135         mp[i] = false;
136     }
137 }
138 int cantor(int s[], int n){
139     int res = 0;
140     int cnt;
141     for (int i = 1; i <= n; i++){
142         cnt = 0;
143         for (int j = i + 1; j <= n; j++){
144             if (s[j] < s[i]){
145                 cnt++;
146             }
147         }
148         res += cnt * fact[n - i];
149     }
150     return res;
151 }
152 
153 int main()
154 {
155 #ifndef ONLINE_JUDGE
156     freopen("in.txt", "r", stdin);
157     //freopen("out.txt", "w", stdout);
158 #endif // OPEN_FILE
159     int T;
160     scanf("%d", &T);
161     while (T--){
162         scanf("%d", &n);
163         res = 0;
164         for (int i = n; i >= 1; i--){
165             res = res * 10 + i;
166         }
167         for (int i = 1; i <= n; i++){
168             scanf("%d", &a[i].x);
169             a[i].pos = i;
170         }
171         sort(a + 1, a + n + 1, compare);
172         for (int i = 1; i <= n; i++){
173             b[a[i].pos] = i;
174         }
175         if (n == 6){
176             int pos = cantor(b, n);
177             printf("%d\n", u6[pos]);
178             continue;
179         }
180         if (n == 7){
181             int pos = cantor(b, n);
182             //printf("%d\n", pos);
183             //return 0;
184             printf("%d\n", u7[pos]);
185             continue;
186         }
187         int ans = bfs();
188         printf("%d\n", ans);
189     }
190 }

 

内容概要:本文档详细介绍了基于Python的在线二手电子产品回收系统的设计与实现。项目旨在通过构建一个可靠、安全、透明的平台,提高废旧电子产品的回收率,推动资源的合理再利用,提供安全可靠的交易平台,加强环保意识,促进二手市场的发展,并实现数据驱动的智能化服务。项目面临的主要挑战包括废旧电子产品的检测与评估、信息不对称与交易风险、市场需求的预测与定价、用户体验优化及平台的安全性与数据保护。解决方案涵盖智能化评估与回收定价、高效的二手产品处理流程、完善的售后保障体系、创新的市场需求分析、全程透明化与安全性保障以及定制化用户体验。系统采用微服务架构,包括用户管理、商品评估、交易管理、数据分析、支付与结算等模块。项目还涉及前端界面设计、API接口开发、数据库设计与实现、模型训练与优化、部署与应用等方面。 适合人群:具备一定编程基础,特别是对Python和Web开发有一定了解的研发人员,以及对二手电子产品回收和环保事业感兴趣的从业者。 使用场景及目标:①帮助用户方便地将闲置电子产品回收、交易或再利用,提高废旧电子产品的回收率;②通过智能化的数据分析为用户提供价格评估、市场需求分析等服务,提高回收效率;③提供安全可靠的交易平台,确保交易的公平性和安全性;④推动二手市场的健康发展,为消费者提供经济实惠的产品选择;⑤增强公众的环保意识,推动社会向绿色、低碳方向发展。 其他说明:本文档不仅提供了系统的功能模块设计、数据库表结构、API接口规范,还展示了具体代码实现和GUI界面设计,为开发者提供了全面的技术参考。此外,项目强调了数据安全和隐私保护的重要性,确保平台在运行过程中能够有效保护用户信息。项目未来改进方向包括增强模型的精准度、拓展国际市场、提供更多支付和融资选项、跨平台数据集成与分析、更加智能的回收流程以及强化社交化与社区功能。
内容概要:本文档详细介绍了基于C语言和单片机设计的固态继电器驱动空调温控系统,涵盖了从硬件电路设计、程序设计、GUI设计到代码详解的完整流程。项目旨在实现高效精准的温度控制、提升系统可靠性和寿命、灵活的参数设置和人机交互、降低能耗、模块化设计便于扩展与维护,以及促进智能家居与工业自动化发展。项目通过高精度温度采集与滤波算法、固态继电器驱动与保护电路设计、滞环控制算法、多层次软件模块化设计等创新点,确保系统的高效节能、智能化和高可靠性。; 适合人群:具备一定单片机和C语言编程基础的研发人员,尤其是从事嵌入式系统设计、智能家居和工业自动化领域的工程师。; 使用场景及目标:①实现高效精准的温度控制,确保室内温度维持在理想范围;②提升系统可靠性和寿命,减少故障率和维护成本;③支持灵活的参数设置和用户友好的人机交互界面,提升用户体验;④降低能耗,实现节能控制,推动绿色建筑和节能环保产业的发展;⑤通过模块化设计,便于后续功能升级和系统扩展,如远程监控、数据分析等智能化功能。; 其他说明:项目设计充分考虑了实际应用中的挑战,如温度采集的精度与稳定性、电气兼容性、系统响应速度与控制稳定性、软件设计的资源优化与抗干扰等,提出了针对性的解决方案。系统不仅适用于家庭智能空调,还能广泛应用于工业、商业建筑、医疗环境及农业温室等多个领域。未来改进方向包括智能温度预测与自适应控制、多传感器融合技术应用、远程监控与云平台集成、低功耗与绿色节能优化等。通过该系统,不仅能够精确控制室内温度,保障舒适环境,还能有效节能,延长设备使用寿命,具有重要的实际应用价值和推广意义。
### C++ 中使用 BFS 和 For 循环替代 DFS 的实现 在解决网格类问题时,广度优先搜索 (BFS) 可作为深度优先搜索 (DFS) 的有效替代方案。对于岛屿等问题而言,可以利用队列来管理待访问的位置,并通过 `for` 循环迭代处理这些位置。 #### 岛屿数量问题的 BFS 解决方案 下面是一个基于 BFS 来计算岛屿数量的例子: ```cpp #include <vector> #include <queue> using namespace std; class Solution { public: int numIslands(vector<vector<char>>& grid) { if (grid.empty() || grid[0].empty()) return 0; int rows = grid.size(); int cols = grid[0].size(); int islands = 0; vector<pair<int, int>> directions{{0,-1},{-1,0},{0,1},{1,0}}; for (int r = 0; r < rows; ++r){ for (int c = 0; c < cols; ++c){ if (grid[r][c] == '1'){ ++islands; queue<pair<int, int>> q; q.push({r,c}); while (!q.empty()){ auto [row, col] = q.front(); q.pop(); // 如果当前位置已经被标记,则跳过 if(grid[row][col]=='0') continue; // 将当前陆地标记为已访问 grid[row][col]='0'; // 对四个方向上的相邻节点进行探索 for(auto& dir : directions){ int newRow = row + dir.first; int newCol = col + dir.second; // 检查边界条件以及是否是未访问过的土地 if(newRow >= 0 && newRow < rows && newCol >= 0 && newCol < cols && grid[newRow][newCol] == '1') q.push({newRow,newCol}); } } } } } return islands; } }; ``` 此代码片段展示了如何使用 BFS 方法遍历整个地图并统计岛屿的数量。每当遇到一个新的岛屿部分(即值为 `'1'`),就启动一次新的 BFS 查找过程直到该岛完全被淹没为止。在此过程中,所有属于同一座岛屿的部分都会被设置成水 (`'0'`) 以防止重复计数[^1]。
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