#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int a,b,c; cin >> a >> b >> c;
    int s = a+b+c;
    if(s-max({a,b,c}) > max({a,b,c})) cout << "Yes\n";
    else cout << "No\n";
}