Educational Codeforces Round 147 (Rated for Div. 2)
文章目录一、A-Matching二、B-SorttheSubarray三、C-TearItApart四、D-BlackCells一、A-Matching思路:有几个问号就是10的几次方,除了第一个字符是问号,如果第一个字符是问号,就是*9,因为没有前导零代码:#include#include#include#include#definefifirst#definesesecondusingname