def func(x):
    return (x * (x + 1)) // 2

def main():
    n = int(input())
    ng = 0
    ok = 10 ** 10
    while abs(ok - ng) > 1:
        mid = (ok + ng) // 2
        if n <= func(mid):
            ok = mid
        else:
            ng = mid

    if func(ok) == n:
        print('YES')
        print(ok)
    else:
        print('NO')
    



if __name__ == "__main__":
    main()