RT

priority_queue<pair<int,int>, vector<int>, greater<int> > q;

q.push(make_pair(ans[v],v)); //ans[v]和v都是int类型的

报错:	[Error] no matching function for call to 'std::priority_queue<std::pair<int, int>, std::vector<int>, std::greater<int> >::push(std::pair<int, int>)'