1 |
P1 - Contest Balloons |
Codeforces |
Canada Cup 2016 |

2 |
P2 - Sorting the Coins |
Codeforces |
Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) & Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) |

3 |
P3 - Proper Nutrition |
Codeforces |
Codeforces Round #451 (Div. 2) |

4 |
P4 - Palindromic Supersequence |
Codeforces |
ICM Technex 2018 and Codeforces Round #463 (Div. 1 + Div. 2, combined) |

5 |
P5 - Mr. Kitayuta's Gift |
Codeforces |
Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) |

6 |
P6 - Peter and Snow Blower |
Codeforces |
Codeforces Round #339 (Div. 1) & Codeforces Round #339 (Div. 2) |

7 |
P7 - Fix a Tree |
Codeforces |
Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) |

8 |
P8 - Arya and Bran |
Codeforces |
Codeforces Round #428 (Div. 2) |

9 |
P9 - The Artful Expedient |
Codeforces |
Codeforces Round #439 (Div. 2) |

10 |
P10 - Image Preview |
Codeforces |
Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2) |

11 |
P11 - k-th divisor |
Codeforces |
Educational Codeforces Round 17 |

12 |
P12 - Mike and palindrome |
Codeforces |
Codeforces Round #410 (Div. 2) |

13 |
P13 - Maximum splitting |
Codeforces |
Technocup 2018 - Elimination Round 2 |

14 |
P14 - A Twisty Movement |
Codeforces |
Codeforces Round #462 (Div. 1) & Codeforces Round #462 (Div. 2) |

15 |
P15 - Maximum of Maximums of Minimums |
Codeforces |
Technocup 2018 - Elimination Round 2 |

16 |
P16 - Not Afraid |
Codeforces |
Codeforces Round #406 (Div. 2) |

17 |
P17 - Iterated Linear Function |
Codeforces |
Educational Codeforces Round 13 |

18 |
P18 - Treasure Hunt |
Codeforces |
Educational Codeforces Round 23 |

19 |
P19 - Chess For Three |
Codeforces |
Educational Codeforces Round 33 (Rated for Div. 2) |

20 |
P20 - Olympiad |
Codeforces |
Codeforces Round #467 (Div. 2) |

21 |
P21 - Karen and Coffee |
Codeforces |
Codeforces Round #419 (Div. 2) |

22 |
P22 - Vladik and Memorable Trip |
Codeforces |
Codeforces Round #416 (Div. 2) |

23 |
P23 - Leha and Function |
Codeforces |
Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2) |

24 |
P24 - Book Reading |
Codeforces |
Educational Codeforces Round 31 |

25 |
P25 - Ralph And His Magic Field |
Codeforces |
Codeforces Round #447 (Div. 2) |

26 |
P26 - The Door Problem |
Codeforces |
ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) |

27 |
P27 - Amity Assessment |
Codeforces |
CROC 2016 - Elimination Round |

28 |
P28 - Slava and tanks |
Codeforces |
Codeforces Round #442 (Div. 2) |

29 |
P29 - Robin Hood |
Codeforces |
Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) |

30 |
P30 - Fifa and Fafa |
Codeforces |
Codeforces Round #465 (Div. 2) |