#include <cstdlib>
#include <iostream>

using namespace std;
using ll = long long;

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

  int A, B, C;
  cin >> A >> B >> C;
  cout << (abs(A - B) < C && C < A + B ? "Yes\n" : "No\n");
}