1 |
P1 - Distance in Tree |
Codeforces |
VK Cup 2012 Round 1 |

2 |
P2 - Choosing Capital for Treeland |
Codeforces |
Codeforces Round #135 (Div. 2) |

3 |
P3 - Restoring Password |
Codeforces |
Codeforces Beta Round #76 (Div. 2 Only) |

4 |
P4 - Palindromic Times |
Codeforces |
Codeforces Beta Round #83 (Div. 2 Only) |

5 |
P5 - Palindromic Times |
Codeforces |
Codeforces Beta Round #83 (Div. 2 Only) |

6 |
P6 - Dima and Staircase |
Codeforces |
Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) |

7 |
P7 - Unlucky Ticket |
Codeforces |
Codeforces Round #111 (Div. 2) |

8 |
P8 - Young Table |
Codeforces |
Codeforces Round #147 (Div. 2) |

9 |
P9 - Division into Teams |
Codeforces |
Codeforces Round #106 (Div. 2) |

10 |
P10 - Little Elephant and Problem |
Codeforces |
Codeforces Round #136 (Div. 1) & Codeforces Round #136 (Div. 2) |

11 |
P11 - New Year Contest |
Codeforces |
Codeforces Round #100 |

12 |
P12 - After Training |
Codeforces |
Codeforces Round #123 (Div. 2) |

13 |
P13 - New Year Snowmen |
Codeforces |
Codeforces Round #100 |

14 |
P14 - Series of Crimes |
Codeforces |
Croc Champ 2012 - Round 2 (Unofficial Div. 2 Edition) |

15 |
P15 - Lucky Array |
Codeforces |
Codeforces Beta Round #91 (Div. 1 Only) |

16 |
P16 - Maximum Questions |
Codeforces |
Codeforces Round #450 (Div. 2) |

17 |
P17 - Area of a Star |
Codeforces |
Experimental Educational Round: VolBIT Formulas Blitz |

18 |
P18 - Alyona and Triangles |
Codeforces |
Codeforces Round #358 (Div. 2) |

19 |
P19 - Finding lines |
Codeforces |
Codeforces Round #407 (Div. 1) |

20 |
P20 - Tree or not Tree |
Codeforces |
Codeforces Beta Round #88 |