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想问问这题怎么做？如果步数上线是2^31且要很多步才可达的，有非暴力方法吗？举个例子：

Posted by BloodElf at 2010-02-27 20:23:01 on Problem 2198 
例子：
2147483633 WWWWWBWBWWWWWBWBWBWBWBWBWBWWWBWBWWWWWWWWWWWWWBWWWBWWWWWWWWWWWWWBWBWWWBWBWBWBWBWBWBWWWWWBWBWWWWW
END OF INPUT

我拿标程跑了好几分钟。。。
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