#include <bits/stdc++.h>
int main(void) {
  long data1, data2, data3;
  long sum;
  scanf("%d %d %d", &data1, &data2, &data3);
  sum = data1 + data2;
  printf("sum:%d   data3:%d", sum, data3);
  if (sum >= data3) {
    printf("Yes");
  } else {
    printf("No");
  }
}
