摘要：
样例输出 解题思路： 由于第一个按钮是否按下会影响后面所有的按钮，因此枚举第一个按钮对应的两种情况。另外，如果按钮按下后和目标状态不相同，之前的情况已经枚举完毕，只需要按下下一个按钮即可。 代码： 阅读全文
摘要：
总时间限制: 5000ms 内存限制: 65536kB 描述 There is a square wall which is made of n*n small square bricks. Some bricks are white while some bricks are yellow. Bo 阅读全文
摘要：
There are nine clocks in a 3*3 array (figure 1). The goal is to return all the dials to 12 o'clock with as few moves as possible. There are nine diffe 阅读全文