#include<iostream> #include<algorithm> using namespace std; int main() { int a,b,c; while(cin>>a>>b>>c) { int temp; if(a>b){ temp=a; a=b; b=temp; } if(a>c){ temp=a; a=c; c=temp; } if(b>c){ temp=b; b=c; c=temp; } if(a+b<=c){ cout<<"not a trangle"<<endl; }else{ if(a*a+b*b==c*c){ cout<<"Yes"<<endl; }else{ cout<<"No"<<endl; } } } return 0; }