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https://codeforces.com/contest/2043/problem/BEducational Codeforces Round 173(Div.2) - B. Digits문제 유형: 수학, 정수론시간 제한: 1초메모리 제한: 256MB 문제Artem wrote the digit d">d on the board exactly n!">n! times in a row. So, he got the number dddddd…ddd">dddddd…ddd (exactly n!">n!digits).Now he is curious about which odd digits from 1">1to 9">9 divide the number written on the board. Artem은 정수 d를 정확히 n!..

https://codeforces.com/contest/2033/problem/ACodeforces Round 981(DIv.3) - A. Sakurako and Kosuke문제 유형: 수학, 구현시간 제한: 1초메모리 제한: 256MB 문제Sakurako and Kosuke decided to play some games with a dot on a coordinate line. The dot is currently located in position x=0">x=0. They will be taking turns, and Sakurako will be the one to start.On the i">i-th move, the current player will move the dot in some d..