#include <bits/stdc++.h>
int main() {
  int a, b, c;
  scanf("%d %d %d", &a, &b, &c);
  if (a + b >= 2 && a + b <= 1000 && a + b >= c && c <= 1000) {
    printf("Yes\n");
  } else {
    printf("No\n");
  }
  return a, b, c;
}
