1 |
P1 - Queue at the School |
Codeforces |
Codeforces Round #163 (Div. 2) |

2 |
P2 - NP-Hard Problem |
Codeforces |
Codeforces Round #360 (Div. 1) & Codeforces Round #360 (Div. 2) |

3 |
P3 - Maze |
Codeforces |
Codeforces Round #222 (Div. 1) & Codeforces Round #222 (Div. 2) |

4 |
P4 - Even Odds |
Codeforces |
Codeforces Round #188 (Div. 2) |

5 |
P5 - Kefa and Park |
Codeforces |
Codeforces Round #321 (Div. 2) |