import math


def is_square(n):
    r = round(math.sqrt(n))
    return True if r ** 2 == n else False

n = int(input())
if not is_square(8 * n + 1):
    print('NO')
else:
    print('YES')
    print(round((math.sqrt(8 * n + 1) - 1) // 2))