1 |
P1 - Registration System |
Codeforces |
Codeforces Beta Round #4 (Div. 2 Only) |

2 |
P2 - Qualifying Contest |
Codeforces |
Codeforces Round #346 (Div. 2) |

3 |
P3 - Bear and Three Balls |
Codeforces |
IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) |

4 |
P4 - Simple Molecules |
Codeforces |
Codeforces Round #200 (Div. 2) |

5 |
P5 - Exams |
Codeforces |
Codeforces Round #274 (Div. 2) & Codeforces Round #274 (Div. 1) |

6 |
P6 - Voting |
Codeforces |
Codeforces Round #388 (Div. 2) |

7 |
P7 - Anya and Smartphone |
Codeforces |
Codeforces Round #293 (Div. 2) |

8 |
P8 - Cd and pwd commands |
Codeforces |
VK Cup 2012 Qualification Round 1 |

9 |
P9 - Escape from Stones |
Codeforces |
Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) |

10 |
P10 - Soldier and Cards |
Codeforces |
Codeforces Round #304 (Div. 2) |

11 |
P11 - Mahmoud and a Triangle |
Codeforces |
Codeforces Round #396 (Div. 2) |

12 |
P12 - Queue at the School |
Codeforces |
Codeforces Round #163 (Div. 2) |

13 |
P13 - A and B and Compilation Errors |
Codeforces |
Codeforces Round #294 (Div. 2) |

14 |
P14 - Prison Transfer |
Codeforces |
Codeforces Round #244 (Div. 2) |

15 |
P15 - z-sort |
Codeforces |
Educational Codeforces Round 10 |

16 |
P16 - Div. 64 |
Codeforces |
Codeforces Round #444 (Div. 2) |

17 |
P17 - Elections |
Codeforces |
Codeforces Round #316 (Div. 2) |

18 |
P18 - Amusing Joke |
Codeforces |
Codeforces Round #101 (Div. 2) |

19 |
P19 - Word |
Codeforces |
Codeforces Beta Round #55 (Div. 2) |

20 |
P20 - Grasshopper And the String |
Codeforces |
Codeforces Round #378 (Div. 2) |