#include <bits/stdc++.h>
int main(void) {
  int a, b, c;
  scanf("%d", a);
  scanf("%d", b);
  scanf("%d", c);
  if (a >= 1 && b >= 1 && a <= 500 && b <= 500) {
    if (a + b <= c) {
      printf("Yes\n");
    } else {
      printf("No\n");
    }
  }
}
