杭电ACM OJ 1022 Train Problem I 回溯法求出栈遍历序列 很强大

Train Problem I Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 40163    Accepted Submission(s): 15058 Problem Description As the new term come
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