java-basics/java-programs/DynamicProgramming/maxPath.java at master · Sethu1910/java-basics · GitHub

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package DynamicProgramming;

import java.util.Arrays;

public class maxPath {

public static int maxPathSum(int[][] matrix, int i, int j, int n, int[][] dp) {

if (dp[i][j] == 0) {

if (i == n - 1) {

return matrix[i][j];

}

int num1 = 0;

int num2 = 0;

int num3 = 0;

if (i + 1 < n) {

num1 = maxPathSum(matrix, i + 1, j, n, dp);

}

if (i + 1 < n && j - 1 > -1) {

num2 = maxPathSum(matrix, i + 1, j - 1, n, dp);

}

if (i + 1 < n && j + 1 < n) {

num3 = maxPathSum(matrix, i + 1, j + 1, n, dp);

}

dp[i][j] = matrix[i][j] + Math.max(num1, Math.max(num2, num3));

}

return dp[i][j];

}

public static void print(int[][] dp) {

for(int i = 0; i < dp.length; i++) {

System.out.println(Arrays.toString(dp[i]));

}

public static void main(String[] args) {

// TODO Auto-generated method stub

int[][] matrix = { {2} };

int[][] dp = new int[matrix.length][matrix.length];

int ans = Integer.MIN_VALUE;

for (int i = 0; i < matrix.length; i++) {

ans = Math.max(ans, maxPathSum(matrix, 0, i, matrix.length, dp));

}

print(dp);

}

java-basics/java-programs/DynamicProgramming/maxPath.java at master · Sethu1910/java-basics · GitHub

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