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