There is a fence with n posts, each post can be painted with one of the k colors.
You have to paint all the posts such that no more than two adjacent fence posts have the same color. Return the total number of ways you can paint the fence.Notice
n and k are non-negative integers.
Example
Given n=3, k=2 return 6post 1, post 2, post 3
way1 0 0 1 way2 0 1 0 way3 0 1 1 way4 1 0 0 way5 1 0 1 way6 1 1 0LeetCode上的原题，请参见我之前的博客。
class Solution {public: /** * @param n non-negative integer, n posts * @param k non-negative integer, k colors * @return an integer, the total number of ways */ int numWays(int n, int k) { int same = 0, diff = k; for (int i = 2; i <= n; ++i) { int t = diff; diff = (same + diff) * (k - 1); same = t; } return same + diff; }}; 本文转自博客园Grandyang的博客，原文链接：，如需转载请自行联系原博主。