#include using namespace std; typedef long long ll; const int Nmax = 50005; ll ans = LLONG_MAX, dist[Nmax], S[Nmax]; int i, j, n, m, ap; vector start[Nmax]; vector< pair > v[30]; vector< vector > sol; int main() { // freopen("input", "r", stdin); // freopen("output", "w", stdout); cin >> n >> m; for(i=0; i> start[i][j]; v[j][i] = { start[i][j], i }; } } for(i=0; i