n = int(input())
l, r = 0, 10 ** 18
while r - l > 1:
    m = (l + r) // 2
    if m * (m + 1) // 2 >= n:
        r = m
    else:
        l = m
if r * (r + 1) // 2 == n:
    print("YES")
    print(r)
else:
    print("NO")