N = int(input())

l = 0
r = 10**18+1
while r - l > 1:
    m = (l + r) // 2
    x = (m * (m+1)) // 2
    if x <= N:
        l = m
    else:
        r = m
        
if (l * (l+1)) // 2 == N:
    print('YES')
    print(l)
else:
    print('NO')