Start: Aug, 30, 2019 14:00:00
桐乡市求是实验中学八年级PYTHON教学
End: Jan, 01, 2020 18:00:00
Time elapsed:
Time remaining:

求s=2+4+6+……100 2685

Time Limit:  1 s      Memory Limit:   256 MB
Submission:310     AC:229     Score:100

Description

求s=2+4+6+……100

Output

2550

Samples

input
output
2550