1 |
P1 - New Year and Counting Cards |
Codeforces |
Good Bye 2017 |

2 |
P2 - The Monster |
Codeforces |
Codeforces Round #406 (Div. 2) |

3 |
P3 - Vasya and Cornfield |
Codeforces |
Technocup 2019 - Elimination Round 1 |

4 |
P4 - New Building for SIS |
Codeforces |
Codeforces Round #503 (by SIS, Div. 2) |

5 |
P5 - The Rank |
Codeforces |
Codeforces Round #502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2) |

6 |
P6 - The Bits |
Codeforces |
Codeforces Round #502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2) |

7 |
P7 - Not Afraid |
Codeforces |
Codeforces Round #406 (Div. 2) |

8 |
P8 - Shell Game |
Codeforces |
Codeforces Round #401 (Div. 2) |

9 |
P9 - Okabe and Future Gadget Laboratory |
Codeforces |
Codeforces Round #420 (Div. 2) |

10 |
P10 - Valued Keys |
Codeforces |
Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) |

11 |
P11 - Equations of Mathematical Magic |
Codeforces |
Codeforces Round #516 (Div. 2, by Moscow Team Olympiad) |

12 |
P12 - Margarite and the best present |
Codeforces |
Codeforces Round #524 (Div. 2) |

13 |
P13 - Petya and Catacombs |
Codeforces |
?????????? 2018 - ?????????? ????? 3 |

14 |
P14 - Creating the Contest |
Codeforces |
Codeforces Round #506 (Div. 3) |

15 |
P15 - Lucky Year |
Codeforces |
Educational Codeforces Round 21 |

16 |
P16 - LCM |
Codeforces |
Codeforces Round #518 (Div. 2) [Thanks, Mail.Ru!] |

17 |
P17 - Letters Rearranging |
Codeforces |
Educational Codeforces Round 56 (Rated for Div. 2) |

18 |
P18 - Pair of Toys |
Codeforces |
Codeforces Round #504 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final) |