1 |
P1 - Covered Points |
Codeforces |
Educational Codeforces Round 50 (Rated for Div. 2) |

2 |
P2 - Nikita and Order Statistics |
Codeforces |
Codeforces Round #488 by NEAR (Div. 1) |

3 |
P3 - Fuzzy Search |
Codeforces |
Codeforces Round #296 (Div. 1) |

4 |
P4 - Thief in a Shop |
Codeforces |
Educational Codeforces Round 9 |

5 |
P5 - Sum the Fibonacci |
Codeforces |
Codecraft-18 and Codeforces Round #458 (Div. 1 + Div. 2, combined) |

6 |
P6 - Ladies' Shop |
Codeforces |
Codeforces Round #176 (Div. 1) |

7 |
P7 - Yet Another String Matching Problem |
Codeforces |
Educational Codeforces Round 40 (Rated for Div. 2) |

8 |
P8 - Lightsabers (hard) |
Codeforces |
Helvetic Coding Contest 2018 online mirror (teams allowed, unrated) |

9 |
P9 - Painting Square |
Codeforces |
Codeforces Round #181 (Div. 2) |

10 |
P10 - Rusty String |
Codeforces |
Codeforces Round #423 (Div. 1, rated, based on VK Cup Finals) |

11 |
P11 - Binary Table |
Codeforces |
CROC 2016 - Final Round [Private, For Onsite Finalists Only] |

12 |
P12 - Bandit Blues |
Codeforces |
Divide by Zero 2018 and Codeforces Round #474 (Div. 1 + Div. 2, combined) |

13 |
P13 - Dasha and cyclic table |
Codeforces |
Codeforces Round #390 (Div. 2) |

14 |
P14 - Design Tutorial: Increase the Constraints |
Codeforces |
Codeforces Round #270 |

15 |
P15 - Boolean Computer |
Codeforces |
Lyft Level 5 Challenge 2018 - Elimination Round |

16 |
P16 - Random Elections |
Codeforces |
Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) |

17 |
P17 - K Paths |
Codeforces |
Avito Code Challenge 2018 |

18 |
P18 - The Child and Binary Tree |
Codeforces |
Codeforces Round #250 (Div. 1) |

19 |
P19 - PolandBall and Many Other Balls |
Codeforces |
8VC Venture Cup 2017 - Elimination Round |

20 |
P20 - Perpetual Subtraction |
Codeforces |
VK Cup 2018 - Round 1 |

21 |
P21 - Transforming Sequence |
Codeforces |
AIM Tech Round (Div. 1) |

22 |
P22 - Kyoya and Train |
Codeforces |
Codeforces Round #309 (Div. 1) |

23 |
P23 - Cyclic Cipher |
Codeforces |
Codeforces Round #453 (Div. 1) |

24 |
P24 - Complete the Permutations |
Codeforces |
Codeforces Round #372 (Div. 1) |

25 |
P25 - Test Data Generation |
Codeforces |
VK Cup 2017 - Round 3 |

26 |
P26 - Tree |
Codeforces |
Codeforces Round #499 (Div. 1) |

27 |
P27 - Days of Floral Colours |
Codeforces |
Codeforces Round #431 (Div. 1) |

28 |
P28 - Epic Convolution |
Codeforces |
Mail.Ru Cup 2018 Round 1 |