数据量这么小，果断状态压缩+dp。
1 /* 3006 */ 2 #include <iostream> 3 #include <string> 4 #include <map> 5 #include <queue> 6 #include <set> 7 #include <stack> 8 #include <vector> 9 #include <deque> 10 #include <algorithm> 11 #include <cstdio> 12 #include <cmath> 13 #include <ctime> 14 #include <cstring> 15 #include <climits> 16 #include <cctype> 17 #include <cassert> 18 #include <functional> 19 using namespace std; 20 //#pragma comment(linker,"/STACK:102400000,1024000") 21 22 #define mpii map<int,int> 23 #define vi vector<int> 24 #define pii pair<int,int> 25 #define vpii vector<pair<int,int> > 26 #define rep(i, a, n) for (int i=a;i<n;++i) 27 #define per(i, a, n) for (int i=n-1;i>=a;--i) 28 #define pb push_back 29 #define mp make_pair 30 #define fir first 31 #define sec second 32 #define all(x) (x).begin(),(x).end() 33 #define SZ(x) ((int)(x).size()) 34 #define lson l, mid, rt<<1 35 #define rson mid+1, r, rt<<1|1 36 37 const int N = 105; 38 const int maxn = (2<<14)+1; 39 bool visit[maxn]; 40 int sft[15]; 41 42 int main() { 43 ios::sync_with_stdio(false); 44 #ifndef ONLINE_JUDGE 45 freopen("data.in", "r", stdin); 46 freopen("data.out", "w", stdout); 47 #endif 48 49 int n, m; 50 int x, nn; 51 int ans, tmp; 52 53 sft[1] = 1; 54 rep(i, 2, 15) 55 sft[i] = sft[i-1] << 1; 56 57 memset(visit, false, sizeof(visit)); 58 while (scanf("%d %d", &n, &m)!=EOF) { 59 memset(visit, false, sizeof(visit)); 60 visit[0] = true; 61 rep(i, 0, n) { 62 scanf("%d", &nn); 63 tmp = 0; 64 while (nn--) { 65 scanf("%d", &x); 66 tmp |= sft[x]; 67 } 68 per(j, 0, maxn) { 69 if (visit[j]) { 70 visit[j|tmp] = true; 71 } 72 } 73 } 74 75 ans = 0; 76 rep(j, 1, maxn) 77 ans += visit[j]; 78 printf("%d ", ans); 79 } 80 81 #ifndef ONLINE_JUDGE 82 printf("time = %d. ", (int)clock()); 83 #endif 84 85 return 0; 86 }