#include <iostream>
#include<string>
using namespace std;

int main()
{
    int a, b;
    cin >> a >> b;
    int min;
    if(a < b) {
        min = a;
    }
    else {
        min = b;
    }
    if((min * min) % 2 == 1) {
        min -= 1;
    }
    cout << min * min << endl;
    return 0;
}
/*
 3 16
 
 I : 16
 II : 16
 III : 16
 
 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 
 **/