#include <iostream>
#include <cmath>
using namespace std;
int main() {
int x,y,d;
cout<<"unesi broj 1"<<endl;
cout<<"unesi broj 2"<<endl;
cin>>x>>y;
d=x*x-y*y;
if (d>0)cout<<sqrt(d)<<endl;
else if (d==0) cout<<2*x-3*y<<endl;
else cout<<pow(d,4)<<endl;
return 0;
}
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