题解

#include<bits/stdc++.h>
using namespace std;
const int N = 1000010;
int a[N];
int main (){
    int n;
    cin>>n;
    for (int i = 1;i<=n;i++){
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    int res = 0;
    for (int i = 1;i<=ceil(n/2.0);i++){
        res+=a[i];
    }
    cout<<res;
}