import sequtils,strutils,math
var
    N = stdin.readline.parseBiggestInt
    f : int64
    n : int64
N *= 2
n = floor(sqrt(N.float64)).int64
n -= 1
for k in n .. n + 2:
    if k * (k + 1) == N:
        f = k
if f > 0:
    echo "YES"
    echo f
else:
    echo "NO"