1 |
P1 - Minimizing the String |
Codeforces |
Educational Codeforces Round 54 (Rated for Div. 2) |

2 |
P2 - Mike and gcd problem |
Codeforces |
Codeforces Round #410 (Div. 2) |

3 |
P3 - USB vs. PS/2 |
Codeforces |
Educational Codeforces Round 17 |

4 |
P4 - k-rounding |
Codeforces |
?????????? 2018 - ?????????? ????? 1 |

5 |
P5 - Letters Rearranging |
Codeforces |
Educational Codeforces Round 56 (Rated for Div. 2) |

6 |
P6 - Exams |
Codeforces |
Codeforces Round #377 (Div. 2) |

7 |
P7 - Mishka and the Last Exam |
Codeforces |
Educational Codeforces Round 56 (Rated for Div. 2) |

8 |
P8 - Treasure Hunt |
Codeforces |
Educational Codeforces Round 23 |

9 |
P9 - Sequence Transformation |
Codeforces |
Codeforces Round #514 (Div. 2) |

10 |
P10 - Ilya and tic-tac-toe game |
Codeforces |
Codeforces Round #390 (Div. 2) |

11 |
P11 - Ehab and subtraction |
Codeforces |
Codeforces Round #525 (Div. 2) |

12 |
P12 - Vasya and Triangle |
Codeforces |
Technocup 2019 - Elimination Round 1 |

13 |
P13 - Co-prime Array |
Codeforces |
Educational Codeforces Round 11 |

14 |
P14 - Andryusha and Colored Balloons |
Codeforces |
?????????? 2017 - ????? (?????? ??? ??????-??????????) |

15 |
P15 - Protect Sheep |
Codeforces |
Codeforces Round #470 (rated, Div. 2, based on VK Cup 2018 Round 1) |

16 |
P16 - Mouse Hunt |
Codeforces |
Educational Codeforces Round 49 (Rated for Div. 2) |

17 |
P17 - Robbers' watch |
Codeforces |
Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) |

18 |
P18 - Modulo Sum |
Codeforces |
Codeforces Round #319 (Div. 2) |

19 |
P19 - Three displays |
Codeforces |
Codeforces Round #485 (Div. 2) |