练习2 题目列表 Watermelon Way Too Long Words Team Theatre Square Next Round Bit++ Domino piling Beautiful Matrix Petya and Strings Helpful Maths Word Capitalization Boy or Girl String Task Stones on the Table Bear and Big Brother Elephant Soldier and Bananas Word Young Physicist Wrong Subtraction Football Nearly Lucky Number Anton and Danik Translation Tram Vanya and Fence Queue at the School Beautiful Year Chat room Lucky Division