#include <bits/stdc++.h>

using namespace std;

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    vector <int> v(3);

    cin >> v[0] >> v[1] >> v[2];

    sort(v.begin(),v.end());

    if(v[0] + v[1] > v[2]) cout << "Yes" << '\n';
    else cout << "No" << '\n';
    return 0;   
}