[HackerEarth] You are given 2 strings A and B of the same length N. A contains '0', '1', and '?'; B contains only '0' and '1'. Your task is to find minimum cost of transforming A into B by performing - 题解

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题目信息
题号 P17722
标题 [HackerEarth] You are given 2 strings A and B of the same length N. A contains '0', '1', and '?'; B contains only '0' and '1'. Your task is to find minimum cost of transforming A into B by performing
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