#include<bits/stdc++.h>
using namespace std;
int main()
{
int a,b,c;
cin>>a>>b>>c;
if(a+b<=c or a+c<=b or c+b<=a)
{
cout<<"no";
}
else
{
cout<<"yes"<<endl;
int p=(a+b+c)/2;
cout<<sqrt(p*(p-a)*(p-b)*(p-c))<<endl<<a+b+c;
}
}