import sys
from math import isqrt


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    n = int(input())
    k = isqrt(8 * n + 1) // 2

    if k * (k + 1) // 2 != n:
        print('NO')
    else:
        print('YES')
        print(k)


if __name__ == '__main__':
    main()