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B. Numbers on the Chessboardtime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given a chessboard of size n×n. It is fille...

  惭愧啊 菜到DIV3 C都又T又WA得题目大意给出n和k，让你判断n能否由k个2的幂的和组成，并输出。正确思路：把n转二进制存数组，因为，所以不断从高位向低位转换并判断就好了.//#include <bits\stdc++.h>#include <iostream>#include <queue>#include <iomani...

求出区间里对3取余为0,1,2的个数，DP[ i ] [ j ]表示 到前i个数对3取余为j的方案数#include <bits\stdc++.h>#include <iostream>#include <queue>#include <iomanip>#include <cmath>#include <set&...

A.无法用言语形容...一直被大佬搞，刚才从新读了遍题，是自己沙雕了#include <bits/stdc++.h>using namespace std;typedef long long ll;typedef long double ld;typedef unsigned long long ull;//typedef __int128 bll;const ll ...