#include <iostream>
#include <fstream>
using namespace std;
int main()
{
    std::ifstream in("in.txt");
    std::cin.rdbuf(in.rdbuf());
    std::ofstream out("out.txt");
    std::cout.rdbuf(out.rdbuf());

    int a, b, c;
    cin >> a >> b >> c;

    int result1 = a * a + (b + c) * (b + c);
    int result2 =  b * b + (a + c) * (a + c);
    int result3 = c * c + (a * b) * (a * b);

    if(result1 < result2 && result1 < result3)
        cout << result1;
    if(result2 < result1 && result2 < result3)
        cout << result1;
    if(result3 < result1 && result3 < result2)
        cout << result1;

}