uva 10604

状态压缩  奇怪的是A与B混合 和 B与A 混合得到的热量可能不同

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <set>
#include <stack>
#include <vector>
#include <sstream>
#include <cstring>
#include <string>
#include <map>
#include <queue>
#include <algorithm>
#include <iostream>
#define FFI freopen("in.txt", "r", stdin)
#define maxn 1000100
#define INF 0x3f3f3f3f
#define inf 10000000
#define MOD 1000000007
#define ULL unsigned long long
#define LL long long
#define _setm(houge) memset(houge, INF, sizeof(houge))
#define _setf(houge) memset(houge, -1, sizeof(houge))
#define _clear(houge) memset(houge, 0, sizeof(houge))
using namespace std;

int g[10][10], r[10][10];
int dp[1500][10];
int a[20], n, k;

int main() {
	// FFI;
	int t;
	scanf("%d", &t);
	while(t --) {
		scanf("%d", &n);
		for(int i = 1; i <= n; ++ i) {
			for(int j = 1; j <= n; ++ j) {
				scanf("%d%d", &g[i][j], &r[i][j]);
			}
		}
		scanf("%d", &k);
		for(int i = 0; i < k; ++ i) {
			scanf("%d", &a[i]);
		}
		_setm(dp);
		for(int i = 0; i < k; ++ i) {
			dp[1<<i][a[i]] = 0;
		}
		int tot = (1<<k);
		for(int s = 0; s < tot; ++ s) {
			for(int i = 1; i <= n; ++ i) {
				if(dp[s][i] == INF) continue;
				for(int s2 = 0; s2 < tot; ++ s2) {
					if(s&s2) continue;
					for(int j = 1; j <= n; ++ j) {
						if(dp[s2][j] == INF) continue;
						int S = s|s2, now = g[i][j], v = r[i][j];
						int now2 = g[j][i], v2 = r[j][i];
						dp[S][now] = min(dp[S][now], dp[s][i]+dp[s2][j]+v);
						dp[S][now2] = min(dp[S][now2], dp[s][i]+dp[s2][j]+v2);
					}
				}
			}
		}
		int ans = INF;
		for(int i = 1; i <= n; ++ i) {
			ans = min(ans, dp[tot-1][i]);
		}
		printf("%d\n", ans);
		char a[2];
		scanf("%s", a);
	}
	return 0;
}

　　

转载于:https://www.cnblogs.com/avema/p/3899442.html