#include <bits/stdc++.h>
int main(void) {
  int a;
  int b;
  int c;
  scanf("%d", &a);
  scanf("%d", &b);
  scanf("%d", &c);
  if ((a + b) <= c) {
    printf("No\n");
  } else {
    printf("Yes\n");
  }
  return (0);
}
