「hdu - 4035」Maze
设 $dp_x$ 为从 $x$ 走出去的期望步数,可以写出转移 $\displaystyle dp_x = k_x \cdot dp_1 + e_x \cdot 0 + (1 - k_x - e...
In mathematics you don't understand things, you just get used to them.
In mathematics you don't understand things, you just get used to them.