난이도: Medium문제 설명You are given a 0-indexed string pattern of length n consisting of the characters 'I' meaning increasing and 'D' meaning decreasing. A 0-indexed string num of length n + 1 is created using the following conditions:num consists of the digits '1' to '9', where each digit is used at most once.If pattern[i] == 'I', then num[i] .If pattern[i] == 'D', then num[i] > num[i + 1].Return th..