#!/usr/bin/env python
# coding=utf-8
# Created Time: 2017-08-08 13:03:53
# Modified Time: 2017-08-08 13:05:38
sum = 0
n = 99
while n >0:
sum = sum + n
n = n - 2
print sum
# coding=utf-8
# Created Time: 2017-08-08 13:03:53
# Modified Time: 2017-08-08 13:05:38
sum = 0
n = 99
while n >0:
sum = sum + n
n = n - 2
print sum