#include<stdio.h>

int main(void) {
  int a, b, c;
  int max, x, y;
  
  scanf("%d %d %d", &a, &b, &c);
  
  if(a >= b && a>= c) {
    max = a;
    x = b;
    y = c;
  }
  else if(b >= a && b>= c) {
    max = b;
    x = a;
    y = c;
  }
  else {
    max = c;
    x = a;
    y = b;
  }
  
  if(max == x + y;) {
    puts("YES");
  }
  else {
    puts("NO");
  }
  return 0;
}