Hack
Now
EN
Login
Register
HackNow
1 dan N gacha yig'indi | HackNow
Go back
Reading Mode
Problem
Submissions
1 dan N gacha yig'indi
lock
UZ only
Oson
100 points
1 s
256 MB
Input format
Output format
Constraints
Examples
1
1
Example #1
Input
5
Output
15
Solution editor
Python 3
Clear
Language
PYTHON
UTF-8
Tab
4 spaces
Ctrl
+
Enter
Submit
Submit
HackNowHackNow