#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int H,W; int mat[10000][50]; int V[10000]; int R[50]; void solve() { int i,j,k,l,r,x,y; string s; cin>>W>>H; FOR(i,H) { cin>>x; FOR(j,x) { cin>>y; mat[i][y-1]=1; } cin>>V[i]; } FOR(i,W) { if(mat[i][i]==0) { for(j=i+1;j=H) break; FOR(k,W) swap(mat[i][k],mat[j][k]); swap(V[i],V[j]); } for(j=i+1;j