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big faint,三天的煎熬,无数个的失眠,2^N个的WA换来1个的AC操,做了三天终于把这道题搞定了,妈的,题目理解错误了,还以为是要求全部的,结果是只要能推出多少显示多少,只有全部不能推出来才显示“none”,妈的,英语还是不行啊,要恶补English啊 Followed by:
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