#!/usr/bin/env python
import sys,ctypes
if sys.platform.startswith('linux'):
	libm=ctypes.cdll.LoadLibrary('libm.so.6')
elif sys.platform=='darwin':
	libm=ctypes.cdll.LoadLibrary('libSystem.dylib')
elif sys.platform=='win32':
	libm=ctypes.cdll.LoadLibrary('msvcr120.dll')
else:
	raise ImportError
sqrtl=lambda n:libm.sqrtl(ctypes.c_longdouble(n))
libm.sqrtl.restype=ctypes.c_longdouble
n=int(sys.stdin.readline())
n=sqrtl(8*n+1)
q=int(n)
print('NO' if q<n else 'YES\n%d'%(q/2))