Paint Fence
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这道题可以算是真正dp的经典入门题,自己一定得好好多多看看想想。
给出一种思路,还有其他的,
参看点击打开链接
参看点击打开链接
public class Solution { public int numWays(int n, int k) { int[] dp = {0, k, k*k, 0}; if (n <= 2) { return dp[n]; } for (int i = 2; i < n; i++) { dp[3] = (k-1)*dp[1] + (k-1)*dp[2]; dp[1] = dp[2]; dp[2] = dp[3]; } return dp[3]; }}
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