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: 82ms
Memory: 24436kB
Author: wjj
In contest: 1122 
s=0
t=0

while t<100:
  t+=2
  s+=t
print (s)