312. Burst Balloons 继续趟pytho的坑……

这次被坑的是初始化二维数组……

[[0] * size] * size != [[0] * size for i in range(size)] == [[0 for i in range(size)] for i in range(size)]

然后读了读 http://ars.me/programming/2014/06/14/py-listmul/ 妥了……