警示后人：函数慎用vector传参

void Update(int id,vector<vector<int>> u){
	for(int i = 1;i<=k;i++)
		c[i] += u[id][i];
}

...

if(h[r[i][top[i]].second] == k)
  Update(r[i][top[i]].second,u),ans++;

if(h[r[i][top[i]].second] == k){
  for(int l = 1;l<=k;l++)
    c[l] += u[r[i][top[i]].second][l];
  ans++;
}