
url = "https://atcoder.jp//contests/abc047/tasks/abc047_a"

def main():
    t = list(map(int, input().split()))
    if sum(t[0:2]) == t[2] or sum(t[1:]) == t[0] or sum(t[::2]) == t[1]:
        print('Yes')
    else:
        print('NO')

if __name__ == '__main__':
    main()
