题目描述One day, Ahmed_Hossam went to Hemose and said "Let's solve a gym contest!". Hemose didn't want to do that, as he was playing Valorant, so he came up with a problem and told it to Ahmed to distr...
题目描述You are given an integer $n$ . In $1$ move, you can do one of the following actions:erase any digit of the number (it's acceptable that the number before the operation has exactly one digit and...
题目描述Polycarp doesn't like integers that are divisible by $3$ or end with the digit $3$ in their decimal representation. Integers that meet both conditions are disliked by Polycarp, too.Polycarp sta...
题目描述Young Bytensson loves to hang out in the port tavern, where he often listens to the sea dogs telling their tales of seafaring.Initially, he believed them all, however incredible they sounded.Ov...
题目描述There is a chessboard of size $n$ by $n$ . The square in the $i$ -th row from top and $j$ -th column from the left is labelled $(i,j)$ .Currently, Gregor has some pawns in the $n$ -th row. Ther...