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: 83ms
Memory: 24300kB
Author: wofgoal
In contest: 1122 
c=0
s=0
while c<=100:
  s+=c
  c+=2
else:
  print (s)