Paint House

Java

public class Solution {
    /**
     * @param costs: n x 3 cost matrix
     * @return: An integer, the minimum cost to paint all houses
     */
		public int minCost(int[][] costs) {
			
			
			dp[0][0] = costs[0][0];
			dp[0][1] = costs[0][1];
			dp[0][2] = costs[0][2];
			for (int i = 1; i < costs.length; i++) {
				for (int j = 0; j < costs[0].length; i++) {
					dp[i][j] = Math.min(costs[i - 1][(j + 1) % 3], costs[i - 1][(j + 2) % 3]) + costs[i][j]
				}
			}
		}
}