#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; if(a+b>c&&a+c>b&&c+b>a) {if(aa==bb+cc||bbaa+cc||c*caa+bb) {cout<<"Yes"<<endl;} else {cout<<"No"<<endl;}} else {cout<<"Not a triangle"<<endl;} return 0; }