from collections import *
from functools import *
from itertools import *
from heapq import *
import sys,math
input = sys.stdin.readline

n = int(input())


def is_ok(x):
    
    return x*(x+1)//2 >= n
    
y = 10**10
x = 0
while y-x>1:
    mid = (y+x)//2
    if is_ok(mid):
        y = mid
    else:
        x = mid
if y*(y+1)//2==n:
    print('YES')
    print(y)
else:
    print('NO')