def main():
    list = [int(x) for x in input().split()]


    if (list[0] == list[1] + list[2]) | (list[1] == list[0] + list[2]) | (list[2] == list[0] + list[1]):
        print("YES")
    else:
        print("NO")

if __name__ == "__main__":
    main()
