【Codeforces】[1A]Theatre Square

【Codeforces】[1B]Spreadsheets

【Codeforces】[25A]IQ test

【Codeforces】[274A]k-Multiple Free Set

【Codeforces】[300A]Array

【Codeforces】[348A]Mafia

【Codeforces】[366A]Dima and Guards

【Codeforces】[371C]Hamburgers

【Codeforces】[546A]Soldier and Bananas

【Codeforces】[597A]Divisibility

【Codeforces】[598A]Tricky Sum

【Codeforces】[606A]Magic Spheres

【Codeforces】[610A]Pasha and Stick

【Codeforces】[610B]Vika and Squares

【Codeforces】[612C]Replace To Make Regular Bracket Sequence

【Codeforces】[614A]Link/Cut Tree

【Codeforces】[617A]Elephant

【Codeforces】[621A]Wet Shark and Odd and Even

【Codeforces】[621B]Wet Shark and Bishops

【Codeforces】[624A]Save Luke

【Codeforces】[630A]Again Twenty Five!

【Codeforces】[630C]Lucky Numbers

【Codeforces】[638A]Home Numbers

【Codeforces】[651A]Joysticks

【Codeforces】[651B]Beautiful Paintings

【Codeforces】[651C]Watchmen

【Codeforces】[652A]Gabriel and Caterpillar

【Codeforces】[653A]Bear and Three Balls

【Codeforces】[656A]Da Vinci Powers

【Codeforces】[658A]Bear and Reverse Radewoosh

【Codeforces】[659A]Round House

【Codeforces】[659C]Tanya and Toys

【Codeforces】[667A]Pouring Rain

【Codeforces】[669A]Little Artem and Presents

【Codeforces】[66A]Petya and Java

【Codeforces】[66B]Petya and Countryside

【Codeforces】[670D2]D2. Magic Powder - 2

【Codeforces】[673A]Bear and Game

【Codeforces】[673B]Problems for Round

【Codeforces】[675A]Infinite Sequence

【Codeforces】[675B]Restoring Painting

【Codeforces】[75A]Life Without Zeros