poj 3254

状态压缩 dp

dp[i][j] 为第 i 行状态为 j 的总数

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <vector>
#include <sstream>
#include <string>
#include <cstring>
#include <algorithm>
#include <iostream>
#define maxn 2005
#define INF 0x3f3f3f3f
#define inf 10000000
#define MOD 100000000
#define ULL unsigned long long
#define LL long long

using namespace std;

int dp[15][1 << 13], mapp[1 << 13], sta[1 << 13];
int n, m, num;

void init() {
    memset(dp, 0, sizeof(dp));
    memset(mapp, 0, sizeof(mapp));
    num = 0;
    for(int i = 0; i < (1<<m); ++ i) {
        int d = i&(i << 1);
        if(d == 0) sta[num++] = i;
    }
    // printf("num : %d\n", num);
}

int main()
{
    while(scanf("%d%d", &n, &m) == 2) {
        init();
        // puts("*********************");
        // for(int i = 0; i < num; ++ i) {
        //     printf("%d ", sta[i]);
        // }
        // puts("**********************");
        for(int i = 0; i < n; ++ i) {
            for(int j = 0; j < m; ++ j) {
                int a;
                scanf("%d", &a);
                if(a == 0) mapp[i] = mapp[i]|(1 << j);
            }
        }
        for(int i = 0; i < num; ++ i) {
            if((mapp[0] & sta[i]) == 0) {
                dp[0][i] = 1;
            }
        }
        for(int i = 1; i < n; ++ i) {
            for(int j = 0; j < num; ++ j) {
                if(mapp[i-1] & sta[j]) continue;
                for(int q = 0; q < num; ++ q) {
                    if(mapp[i]&sta[q] || sta[j]&sta[q]) continue;
                    dp[i][q] += dp[i-1][j];
                    dp[i][q] %= MOD;
                }
            }
        }
        int ans = 0;
        for(int i = 0; i < num; ++ i) {
            ans += dp[n-1][i];
            ans %= MOD;
        } 
        printf("%d\n", ans);
    }
    return 0;
}