#include <bits/stdc++.h>
using namespace std;
int main() {
 int a,b,c;
    cin >> a >> b >> c;
    if(a + b > c)
        cout << "yes";
    else
        cout << "no";
    return 0;
}

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

int main() { int a, b, c; cin >> a >> b >> c; if (a + b > c) { cout << "yes"; } else { cout << "no"; } return 0; }