Codeforces: chemthan
Topcoder: chemthan
Atcoder: chemthan
Cscademy: chemthan
Codechef: chemthan
Hackerrank: chemthan
Hackerearth: chemthan
#49. CodeChef: Almost Palindromic (January Cook-Off 2020)
#40. Codeforces: Beautiful Mirrors (Codeforces Round #604)
#41. Codeforces: Beautiful Mirrors with queries (Codeforces Round #604)
#42. Codeforces: Beautiful Bracket Sequence (easy version) (Codeforces Round #604)
#43. Codeforces: Beautiful Bracket Sequence (hard version) (Codeforces Round #604)
#44. Codeforces: Beautiful League (Codeforces Round #604)
#45. Codeforces: Beautiful Fibonacci Problem (Codeforces Round #604)
#46. ICPC: Easy Query (ICPC Danang 2019)
#47. CodeChef: Stick and polygon (December Lunchtime 2019)
#48. CodeChef / VOI: Tree Query (December Lunchtime 2019 / Vietnam Informatics Round 2 2019)
#39. APIO: Bridges (APIO Russia 2019)
#38. Codechef: K-th Lexicographical Suffix (SnackDown 2019 - Onsite Final Round)
#36. Hackerearth: Medium Sum Set Problem (January Easy' 19)
#37. Hackerearth: Chip on Graph (January Easy' 19)
#29. Hackerearth: Golden rectangles (HourStorm #5)
#30. Hackerearth: Counting the number of intervals (HourStorm #5)
#31. Hackerearth: Beautiful Sequence (HourStorm #5)
#32. ICPC: Forest of Celery (Vietnam National 2018)
#33. ICPC: Keep Them Separated (Vietnam National 2018)
#34. ICPC: Fun with Fibonacci (ICPC Hanoi 2018)
#35. ICPC: Grab a Graph (ICPC Hanoi 2018)
#21. Hackerearth: Easy Sum Set Problem (July Circuits '18)
#22. Hackerearth: Special Shop (July Circuits '18)
#23. Hackerearth: Hard Sum Set Problem (July Circuits '18)
#24. Hackerearth: Partition String (July Circuits '18)
#25. Hackerearth: Modulo Fermat's Theorem (July Circuits '18)
#26. Hackerearth: Isomorphic Trees (July Circuits '18)
#27. Hackerearth: Bonus Money (July Circuits '18)
#28. Hackerearth: Rocket (July Circuits '18)
#19. Codechef: Series Sum (May Challenge 2018)
#20. Codechef: S-T Mincut (May Challenge 2018)
#18. Codechef: S Semi-palindromic (April Challenge 2018)
#15. Codechef: Maximum Tree Path (March Cook-off 2018)
#16. Hackerearth: Big Number Array (March Circuits '18)
#17. Hackerearth: Simple Polygons (March Circuits '18)
#14. Codechef: Broken Clock (February Challenge 2018)
#13. Codechef: Killing Monsters (January Challenge 2018)
#8. Codechef: Football Match (December Cook-Off 2017)
#9. Codechef: Beautiful Array (December Cook-Off 2017)
#10. Codechef: Minimum SubArray (December Cook-Off 2017)
#11. Codechef: Rotate Point (December Cook-Off 2017)
#12. Codechef: Chef and Isomorphic Array (December Cook-Off 2017)
#6. Codechef: Polynomials (November Challenge 2017)
#7. Codechef: Day Schedule (November Challenge 2017)
#2. Codechef: Buggy Calculator (October Lunchtime 2017)
#3. Codechef: Maximum Number (October Lunchtime 2017)
#4. Codechef: Weird Competition (October Lunchtime 2017)
#5. Codechef: Optimal Subset (October Lunchtime 2017)
#1. Codechef: Irrational Root (July Challenge 2017)