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

int main() {
    ifstream in("ant.in");
    cin.rdbuf(in.rdbuf());
    ofstream out("ant.out");
    cout.rdbuf(out.rdbuf());
    long long a,b,c;
    cin >> a >> b >> c;
    long long x,y,z;
    x = (b+c)*(b+c)+a*a;
    y = (a+b)*(a+b)+c*c;
    z = (a+c)*(a+c)+b*b;
    cout << min(x,min(y,z));
    return 0;
}