绝对AC

上代码

#include <bits/stdc++.h>
using namespace std;
int a[114514],n;
int main(){ 
	cin >> n;
    int maxn = -1;
    for(int i = 1;i <= n;i++){
        cin >> a[i];
        maxn = max(maxn,a[i]);
    }
    int maxx = -1;
    for(int i = 1;i <= maxn;i ++){
        int sum = 0;
        for(int j = 1;j <= n;j ++){
            if(i <= a[j]) sum ++;
        }
        maxx = max(maxx,sum * i);
    }
    cout << maxx << endl;
    return 0;
}