1 |
P1 - Ultra-Fast Mathematician |
Codeforces |
Codeforces Beta Round #57 (Div. 2) |

2 |
P2 - Death Note |
Codeforces |
Educational Codeforces Round 48 (Rated for Div. 2) |

3 |
P3 - Word Correction |
Codeforces |
Educational Codeforces Round 38 (Rated for Div. 2) |

4 |
P4 - Woodcutters |
Codeforces |
Codeforces Round #303 (Div. 2) |

5 |
P5 - Timofey and cubes |
Codeforces |
Codeforces Round #395 (Div. 2) |

6 |
P6 - Professor GukiZ's Robot |
Codeforces |
Educational Codeforces Round 6 |

7 |
P7 - Joysticks |
Codeforces |
Codeforces Round #345 (Div. 2) |

8 |
P8 - Almost Prime |
Codeforces |
Codeforces Beta Round #26 (Codeforces format) |

9 |
P9 - Sherlock and his girlfriend |
Codeforces |
ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) |

10 |
P10 - Vasya and Chocolate |
Codeforces |
Educational Codeforces Round 52 (Rated for Div. 2) |

11 |
P11 - Vanya and Cards |
Codeforces |
Codeforces Round #235 (Div. 2) |

12 |
P12 - Sale |
Codeforces |
Codeforces Beta Round #34 (Div. 2) |

13 |
P13 - Team |
Codeforces |
Codeforces Round #143 (Div. 2) |

14 |
P14 - Insomnia cure |
Codeforces |
Codeforces Round #105 (Div. 2) |

15 |
P15 - Stages |
Codeforces |
Codeforces Round #499 (Div. 2) |

16 |
P16 - Phone Numbers |
Codeforces |
Codeforces Round #513 by Barcelona Bootcamp (rated, Div. 1 + Div. 2) |

17 |
P17 - ACM ICPC |
Codeforces |
?????????? 2018 - ?????????? ????? 3 |

18 |
P18 - Young Physicist |
Codeforces |
Codeforces Beta Round #63 (Div. 2) |

19 |
P19 - Reconnaissance 2 |
Codeforces |
Codeforces Beta Round #34 (Div. 2) |

20 |
P20 - Petr and Book |
Codeforces |
Codeforces Beta Round #99 (Div. 2) |

21 |
P21 - Boredom |
Codeforces |
Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2) |

22 |
P22 - Different is Good |
Codeforces |
Codeforces Round #352 (Div. 2) |

23 |
P23 - Array |
Codeforces |
Codeforces Round #181 (Div. 2) |

24 |
P24 - Caisa and Pylons |
Codeforces |
Codeforces Round #264 (Div. 2) |

25 |
P25 - Soldier and Badges |
Codeforces |
Codeforces Round #304 (Div. 2) |

26 |
P26 - Arrays |
Codeforces |
Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) |

27 |
P27 - Supercentral Point |
Codeforces |
Codeforces Round #112 (Div. 2) |

28 |
P28 - Present from Lena |
Codeforces |
Codeforces Beta Round #89 (Div. 2) |

29 |
P29 - Fox and Number Game |
Codeforces |
Codeforces Round #228 (Div. 2) |

30 |
P30 - Hungry Student Problem |
Codeforces |
Educational Codeforces Round 34 (Rated for Div. 2) |