求大佬调代码

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define TRACE 1
#define tcout TRACE && cout
#define fst ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define int long long
#define float double
const int P = 998244353; 
const int Base = 3221225477;
const int INF = 0x3f3f3f3f3f3f3f3f; 
const int N = 5e3 + 10, M = 2e6 + 10;
priority_queue<int,vector<int>,greater<int>> q;
int n;
signed main()
{
	fst;
	cin>>n;
	while(n--)
	{
		int tmp;
		cin>>tmp;
		q.push(tmp);
	}
	int sum=0;
	while(q.size()>=2)
	{
		int a=q.top();
		q.pop();
		int b=q.top();
		q.pop();
		sum+=a+b;
		q.push(a+b);
	}
	cout<<sum;
	return 0;
}