1 |
P1 - Kyoya and Colored Balls |
Codeforces |
Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) |

2 |
P2 - Mashmokh and ACM |
Codeforces |
Codeforces Round #240 (Div. 1) & Codeforces Round #240 (Div. 2) |

3 |
P3 - Modulo Sum |
Codeforces |
Codeforces Round #319 (Div. 2) |

4 |
P4 - Selection of Personnel |
Codeforces |
Experimental Educational Round: VolBIT Formulas Blitz |

5 |
P5 - Points on Line |
Codeforces |
Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) |

6 |
P6 - Chocolate |
Codeforces |
Codeforces Round #340 (Div. 2) |

7 |
P7 - Polo the Penguin and Houses |
Codeforces |
Codeforces Round #177 (Div. 1) |

8 |
P8 - Magic Five |
Codeforces |
Codeforces Round #191 (Div. 2) |

9 |
P9 - Dima and Two Sequences |
Codeforces |
Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) |

10 |
P10 - Shaass and Lights |
Codeforces |
Codeforces Round #178 (Div. 2) |