【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