#include<bits/stdc++.h>
#include<fstream>

using namespace std;
int main ()
{
    std::ifstream in("ant.in");
    std::cin.rdbuf(in.rdbuf());
    std::ofstream out("ant.out");
    std::cout.rdbuf(out.rdbuf());
int a,b,c;
cin>>a>>b>>c;
int n=min(min(((a+b)*(a+b)+c*c),((a+c)*(a+c)+b*b)),((c+b)*(c+b)+a*a));
cout<<n<<endl;


    return 0;
}