#include <iostream>

using namespace std;

int maxNum(int[], int);
int nextMaxNum(int[], int, int);
int maxNumIndex;

int main(){
    int n;
    int* array = NULL;
    cin >> n;
    array = new int [n];
    for (int i = 0; i < n; i++)
        cin >> array[i];
    cout << maxNum(array, n) << endl;
    cout << nextMaxNum(array, n, maxNumIndex) << endl;
    int a = maxNum(array, n);
    int b = nextMaxNum(array, n, maxNumIndex);
    cout << a*b << endl;
    return 0;
}

int maxNum (int array[], int size){
    int max = array[0];
    for (int i = 0; i < size; i++){
        if (array[i] > max){
            max = array[i];
            maxNumIndex = i;
        }
        else continue;
    }
    return max;
}

int nextMaxNum(int array[], int size, int comparedIndex){
    int index = 0;
    int max = array[index];
    if (index == comparedIndex)
        max = array[index+1];
    for (int i = 0; i < size; i++){
        if (array[i] > max){
            if (i != comparedIndex)
                max = array[i];
        }
        else continue;
    }
    return max;
}