#!/bin/env python
import sys,struct 
import sys
def hton(num):
	b1 = ((num>>24) & 0xff);
	b2 = ((num>>16) & 0xff);
	b3 = ((num>>8) & 0xff);
	b4 = (num & 0xff);
	return ((b4<<24) + (b3<<16) + (b2<<8) + b1)
		



a = sys.argv[1].split('.') 
print(a)
a1 = int(a[0])
a2 = int(a[1])
a3 = int(a[2])
a4 = int(a[3])


value = (a1<<24) + (a2<<19) + (a3<<11) + (a4)
value = hton(value)
print(value)
#print(hex(value))