Start: Apr, 17, 2017 10:00:00
Python程序设计基础培训第二次作业
End: Apr, 23, 2017 14:00:00
Time elapsed:
Time remaining:
Problem_ID: A
Result: Accepted
Time: 127ms
Memory: 21432kB
Author: 13588587080
In contest: 1086 
s=0
for i in range(51):
	s=s+i*2
print s