Understand the task
Read CSES statements with constraints, examples, and notes in view.
A focused workspace for the CSES Problem Set
Make room for the problem.
Read the statement, work through your solution, and run the sample in one calm place.
Start practicing Start in guest mode
See how it works EDITORmain.cpp
1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5 long long n;
6 cin >> n;
7 cout << n << " ";
8 while (n != 1) {
9 n = n % 2 ? 3*n+1 : n/2;
10 cout << n << " ";
11 }
12}
Run sampleSample test
TEST BENCHSample
Input
3Expected output
3 10 5 16 8 4 2 1Illustrative demo · no code is submitted. Start with the problem statement.
One workspace, fewer context switches
From first read to accepted.
Keep the tools you need close to the problem. Your code and notes stay beside the statement while you work.
Problem set
Build your solution
Use an integrated editor, keep a draft, and try your own test cases.
Keep useful context
Save notes and return to the ideas you want to remember.
Choose what comes next
Browse topics, organize problems into lists, and follow your own path.
Your work, ready when you are
Pick up where you left off.
Track solved problems and submissions, revisit saved drafts, and sync your progress across devices when you sign in.
Explore the problem setSolvedSee what you have completedSaved
Drafts and notesKeep your working contextReady
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Start with one problem
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