1 |
P1 - Nastya and an Array |
Codeforces |
Codeforces Round #489 (Div. 2) |

2 |
P2 - Case of the Zeros and Ones |
Codeforces |
Codeforces Round #310 (Div. 2) |

3 |
P3 - Brain's Photos |
Codeforces |
Codeforces Round #368 (Div. 2) |

4 |
P4 - Sereja and Dima |
Codeforces |
Codeforces Round #223 (Div. 2) |

5 |
P5 - Lunch Rush |
Codeforces |
Codeforces Round #169 (Div. 2) |

6 |
P6 - Three Parts of the Array |
Codeforces |
Codeforces Round #498 (Div. 3) |

7 |
P7 - Presents |
Codeforces |
Codeforces Beta Round #97 (Div. 2) |

8 |
P8 - Valera and Plates |
Codeforces |
Codeforces Round #216 (Div. 2) |

9 |
P9 - Roma and Lucky Numbers |
Codeforces |
Codeforces Round #160 (Div. 2) |

10 |
P10 - Diverse Team |
Codeforces |
Codeforces Round #486 (Div. 3) |

11 |
P11 - Cormen --- The Best Friend Of a Man |
Codeforces |
Codeforces Round #377 (Div. 2) |

12 |
P12 - Hit the Lottery |
Codeforces |
Codeforces Round #492 (Div. 2) [Thanks, uDebug!] |

13 |
P13 - New Building for SIS |
Codeforces |
Codeforces Round #503 (by SIS, Div. 2) |

14 |
P14 - Team |
Codeforces |
Codeforces Round #143 (Div. 2) |

15 |
P15 - Present from Lena |
Codeforces |
Codeforces Beta Round #89 (Div. 2) |

16 |
P16 - Kyoya and Photobooks |
Codeforces |
Codeforces Round #309 (Div. 2) |

17 |
P17 - Luxurious Houses |
Codeforces |
Codeforces Round #322 (Div. 2) |

18 |
P18 - Currency System in Geraldion |
Codeforces |
Codeforces Round #313 (Div. 2) |

19 |
P19 - Cookies |
Codeforces |
Codeforces Beta Round #94 (Div. 2 Only) |

20 |
P20 - Non-Coprime Partition |
Codeforces |
Codeforces Round #508 (Div. 2) |