#include using namespace std; using ll = long long; int main(){ cin.tie(nullptr); ios_base::sync_with_stdio(false); int N, M; cin >> N >> M; vector A(M), ans(N, -1); vector T(N, vector(M)); for (int i=0; i> A[i]; for (int i=0; i> T[i][j]; } for (int i=0; i 0 && ans[j] == -1){ ans[j] = T[j][i]; A[T[j][i]]--; } } } for (int i=0; i