import sys 
a,b,c = map(int,input().split())
X = int(input())
if a + b - c == X or a + c - b == X:
    print("Yes")
    sys.exit()
if b + a - c == X or b + c - a == X:
    print("Yes")
    sys.exit()
if c + a - b == X or c + b - a == X:
    print("Yes")
    sys.exit()
if a - b + c == X or a - c + b == X:
    print("Yes")
    sys.exit()
if b - a + c == X or b - c + a == X:
    print("Yes")
    sys.exit()
if c - a + b == X or c - b + a == X:
    print("Yes")
    sys.exit()
if a + b + c == X or a - b - c == X:
    print("Yes")
    sys.exit()
if a - b == X or b - c == X or c - a == X or b - a == X or c - b == X or a - c == X:
    print("Yes")
    sys.exit()
if a + b == X or b + c == X or c + a == X or b + a == X or c + b == X or a + c == X:
    print("Yes")
    sys.exit()
if a == X or b == X or c == X:
    print("Yes")
    sys.exit()
else:
  print("No")