[HDU1693]Eat the Trees && 插头DP

#include<cstdio>
#include<algorithm>
#include<cstring>
#include<iostream>
#include<queue>
#include<map>
#define SF scanf
#define PF printf
using namespace std;
typedef long long LL;
const int MAXN = 12;
const int MAXS = 1 << MAXN;
LL d[MAXN+10][MAXN+10][MAXS+10];
int M[MAXN+10][MAXN+10], n, m, S, SS;
int main() {
	int _T, kase = 0; SF("%d", &_T); while(_T--) {
		SF("%d%d", &n, &m);
		memset(d, 0, sizeof(d));
		for(int i = 1; i <= n; i++)
			for(int j = 1; j <= m; j++)
				SF("%d", &M[i][j]);
		d[0][m][0] = 1;
		for(int i = 1; i <= n; i++) {
			for(int s = 0; s < (1<<m); s++) d[i][0][s<<1] = d[i-1][m][s];
			for(int j = 1; j <= m; j++) {
				for(int s = 0; s < (1<<m+1); s++) {
					int q = 1 << j, p = q >> 1;
					bool x = p & s, y = q & s;
					if(M[i][j]) {
						d[i][j][s] = d[i][j-1][s^p^q];
						if(x != y) d[i][j][s] += d[i][j-1][s];
					}
					else {
						if(!x && !y) d[i][j][s] = d[i][j-1][s];
						else d[i][j][s] = 0;
					}
				}
			}
		}
		PF("Case %d: There are %lld ways to eat the trees.\n", ++kase, d
[m][0]);
	}
	return 0;
}