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

    sum = list[0] + list[1] + list[2]
    max = list[0]
    if max <= list[1]:
        max = list[1]
    if max <= list[2]:
        max = list[2]

    if max * 2 == sum:
        print("YES")
    else:
        print("NO")

if __name__ == "__main__":
    main()
