// G. Hagopian--Kattis Piece of Cake	

#include <iostream>
using namespace std;

double max(double n, double x) {
	if (x > n - x) return x;
	return n - x;
}

int main() {
	int n{}, h{}, v{};
	cin >> n >> h >> v;
	cout << 4 * max(n, h) * max(n, v);
}