n = int(input())
ok = 0
ng = 2*10**9
while ng-ok > 1:
    mid = (ng+ok)//2
    if mid*(mid+1)//2 <= n:
        ok = mid
    else:
        ng = mid
if ok*(ok+1)//2==n:
    print("YES")
    print(ok)
else:
    print("NO")