Start: Nov, 12, 2017 10:00:00
2017秋Python程序设计基础培训第二次作业
End: Nov, 19, 2017 12:00:00
Time elapsed:
Time remaining:
Problem_ID: A
Result: Accepted
Time: 98ms
Memory: 24436kB
Author: zhuzhu
In contest: 1122 
n,i=100,2
s=0
while i<=n:
    s+=i  
    i+=2
else:
    print(s)