View Code of Problem 61

#include<bits/stdc++.h>
using namespace std;
int main(){
	int t;
	cin>>t;
        vector <int> a;
	while(t--){
        int n;
        cin>>n;
        a.resize(n);
        for(int i=0;i<n;i++){
            cin>>a[i];
        }
        sort(a.begin(),a.end());
        int sum=0,max=0;
        for(int i=0;i<n;i++){
            sum=a[i]*(n-i);
            if(sum>max)
                max=sum;
        }
        a.clear();
        cout<<max<<endl;
	}
	return 0;
}

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