Submission #4032411

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
int main()
{
    vector<int> store,ans;
    int N,stick,count=0;
    cin>>N;
    if(N<4||N>100000)return 0;
    for(int i=0;i<N;i++)
    {
        cin>>stick;
        store.push_back(stick);
        if(stick<1||stick>1000000000)return 0;
    }
    sort(store.begin(),store.end());
    reverse(store.begin(),store.end());
    for(int i=0;count<2&&i<N-1;i++)
    {
        if(store[i]==store[i+1])
        {
            count++;
            ans.push_back(store[i]);
            i++;
        }
    }
    if(count==2)
        cout<<(long long int)ans[0]*ans[1];
    else
        cout<<'0';
    return 0;
}

Submission Info

Judge Result