hdu 5823 color II 状压dp

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mem(a) memset(a, 0, sizeof(a))
const ll mod = (1LL<<32);
const int inf = 1061109567;
int vis[1<<19], dp[1<<19];
char s[20][20];
int main()
{
    int t, n;
    cin>>t;
    while(t--) {
        cin>>n;
        mem(vis);
        for(int i = 0; i < n; i++)
            scanf("%s", s[i]);
        for(int i = 1; i < (1<<n); i++) {
            for(int j = 0; j < n; j++) {
                if(i>>j&1) {
                    for(int k = 0; k < n; k++) {
                        if(i>>k&1 && s[j][k] == ‘1‘) {
                            vis[i] = 1;
                            break;
                        }
                    }
                }
                if(vis[i])
                    break;
            }
        }
        dp[0] = 0;
        for(int i = 1; i < (1<<n); i++) {
            dp[i] = inf;
            for(int j = i; j; j = (j-1)&i) {
                if(!vis[j])
                    dp[i] = min(dp[i], dp[j^i]+1);
            }
        }
        ll ans = 0, tmp = 1;
        for(int i = 1; i < (1<<n); i++) {
            tmp = tmp*233%mod;
            ans = (ans + tmp*dp[i]%mod)%mod;
        }
        cout<<ans<<endl;
    }
    return 0;
}