1 |
P1 - Petya and Java |
Codeforces |
Codeforces Beta Round #61 (Div. 2) |

2 |
P2 - Vasya and Public Transport |
Codeforces |
Codeforces Round #206 (Div. 2) |

3 |
P3 - Ice Cave |
Codeforces |
Codeforces Round #301 (Div. 2) |

4 |
P4 - Code For 1 |
Codeforces |
Divide by Zero 2017 and Codeforces Round #399 (Div. 1 + Div. 2, combined) |

5 |
P5 - Robbers' watch |
Codeforces |
Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) |

6 |
P6 - Chilly Willy |
Codeforces |
Codeforces Round #152 (Div. 2) |

7 |
P7 - Okabe and Boxes |
Codeforces |
Codeforces Round #420 (Div. 2) |

8 |
P8 - Spotlights |
Codeforces |
Technocup 2017 - Elimination Round 2 |

9 |
P9 - Replace To Make Regular Bracket Sequence |
Codeforces |
Educational Codeforces Round 4 |

10 |
P10 - Cards with Numbers |
Codeforces |
Codeforces Round #155 (Div. 2) |