#include<bits/stdc++.h>

using namespace std; int main() {long long int a,b,c; cin>>a>>b>>c; if(a+b>c&&a+c>b&&c+b>a) {if(aa+bbcc||aa+c*cbb||cc+bb==aa) cout<<"Yes"; else cout<<"No";} else cout<<"Not a triangle"; return 0; }