1. Approximate graph matching for CLARA. github.com/mcontractor/clara/
2. Cherry. codeforces.com/problemset/problem/1554/A
3. CLuster And RepAir tool for introductory programming assignments. github.com/iradicek/clara/
4. Less or equal. codeforces.com/problemset/problem/977/C
5. Who’s opposite? codeforces.com/problemset/problem/1560/B