def nibuntansaku(s):

    left = 0
    right =s

    while right -left > 1:
        mid = (left + right)//2
        if mid*(mid+1)//2 >= s:
            right =mid
        else:
            left =mid
    return right

n =int(input())
a =nibuntansaku(n)
if a*(a+1)//2 ==n:
    print("YES\n{}".format(a))
else:
    print("NO\n")