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: 92ms
Memory: 24436kB
Author: langley1031
In contest: 1122 
sum=0
c=2
while c<=100:
    sum +=c
    c=c+2
print (sum)