【HDOJ】3006 The Number of set

数据量这么小，果断状态压缩+dp。

 /* 3006 */
 #include <iostream>
 #include <string>
 #include <map>
 #include <queue>
 #include <set>
 #include <stack>
 #include <vector>
 #include <deque>
 #include <algorithm>
 #include <cstdio>
 #include <cmath>
 #include <ctime>
 #include <cstring>
 #include <climits>
 #include <cctype>
 #include <cassert>
 #include <functional>
 using namespace std;
 //#pragma comment(linker,"/STACK:102400000,1024000")
 
 #define mpii            map<int,int>
 #define vi                vector<int>
 #define pii                pair<int,int>
 #define vpii            vector<pair<int,int> >
 #define rep(i, a, n)     for (int i=a;i<n;++i)
 #define per(i, a, n)     for (int i=n-1;i>=a;--i)
 #define pb                 push_back
 #define mp                 make_pair
 #define fir                first
 #define sec                second
 #define all(x)             (x).begin(),(x).end()
 #define SZ(x)             ((int)(x).size())
 #define lson            l, mid, rt<<1
 #define rson            mid+1, r, rt<<1|1
 
 const int N = ;
 const int maxn = (<<)+;
 bool visit[maxn];
 int sft[];
 
 int main() {
     ios::sync_with_stdio(false);
     #ifndef ONLINE_JUDGE
         freopen("data.in", "r", stdin);
         freopen("data.out", "w", stdout);
     #endif
 
     int n, m;
     int x, nn;
     int ans, tmp;
 
     sft[] = ;
     rep(i, , )
         sft[i] = sft[i-] << ;
 
     memset(visit, false, sizeof(visit));
     while (scanf("%d %d", &n, &m)!=EOF) {
         memset(visit, false, sizeof(visit));
         visit[] = true;
         rep(i, , n) {
             scanf("%d", &nn);
             tmp = ;
             while (nn--) {
                 scanf("%d", &x);
                 tmp |= sft[x];
             }
             per(j, , maxn) {
                 if (visit[j]) {
                     visit[j|tmp] = true;
                 }
             }
         }
 
         ans = ;
         rep(j, , maxn)
             ans += visit[j];
         printf("%d\n", ans);
     }
 
     #ifndef ONLINE_JUDGE
         printf("time = %d.\n", (int)clock());
     #endif
 
     return ;
 }