#include<iostream>
using namespace std;
int main()
{
int a,b,c;cin>>a>>b>>c;
if(a*b == c*c || a*c == b*b || b*c == a*a) cout<<"YES";else cout<<"NO";
return 0;
}

Code:

#include<iostream>
using namespace std;
int main()
{
    int a,b,c;cin>>a>>b>>c;
    if(a*b == c*c || a*c == b*b || b*c == a*a) cout<<"YES";else cout<<"NO";
    return 0;
}