a,b,c = map(int,input().split())
#print(a,b,c)

if a+b == c or b+c == a or c+a == b:
  print("YES")
else:
  print("NO")
  
#d = list(map(int,input().split()))
#print(d)

#if sum(d) - max(d) == max(d):
  #print("YES")
#else:
  #print("NO")
