#include <bits/stdc++.h> using namespace std; #define _for(i,a,b) for(int i = (a);i < (b);i ++) const int maxn = 50003; struct cmp { bool operator() (const int a,const int b) const { return a%10 > b%10; } }; int main() { priority_queue<int,vector<int>,cmp> pq; pq.push(38); pq.push(46); pq.push(52); pq.push(21); int a = pq.top(); pq.pop(); cout << a << endl; a = pq.top(); cout << a << endl; return 0; }