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/**
 * Java TestCase Generator + Answer Comparator for ProblemSolving
 * @author sinam7 (muwon777@naver.com)
 * <p>
 * To use this generator, You need two java file first:
 *  1. Code you wrote -> default: in class Main
 *  2. AC Code -> default: in class Solution
 *  (!) the code must use stdio (System.in, System.out)
 * <p>
 * Then, make your code's System.in to our custom InputStreamReader.