def check(k):
    return k * (k + 1)//2 <= N

N = int(input())
yes = 1
no = 10 ** 18
while no - yes != 1:
    mid = (yes + no)//2
    if check(mid):
        yes = mid
    else:
        no = mid

if N == yes * (yes + 1)//2:
    print("YES")
    print(yes)
else:
    print("NO")