题目描述 Bessie and the cows were playing games in the barn, but the power was reset and the lights were all turned off. Help the cows get all the lights back on so they can resume their games. The N (1 <= N <= 35) lights conveniently numbered 1..N and…
题目描述 Bessie and the cows were playing games in the barn, but the power was reset and the lights were all turned off. Help the cows get all the lights back on so they can resume their games. The N (1 <= N <= 35) lights conveniently numbered 1..N and…
Description Bessie and the cows were playing games in the barn, but the power was reset and the lights were all turned off. Help the cows get all the lights back on so they can resume their games. The N (1 <= N <= 35) lights conveniently numbered 1.…
题目描述 Bessie and the cows were playing games in the barn, but the power was reset and the lights were all turned off. Help the cows get all the lights back on so they can resume their games. The N (1 <= N <= 35) lights conveniently numbered 1..N and…
传送门 先进行高斯消元 因为要求最少的开关次数,那么: 对于关键元,我们可以通过带入消元求出, 对于自由元,我们暴力枚举,进行dfs,因为只有开关两种状态,0或1 #include <cmath> #include <cstdio> #include <iostream> #define N 40 using namespace std; int n, m, sum, mn = ~(1 << 31); int a[N][N], ans[N]; inline…
