LeetCode-Questions/72.edit-distance.java at main · sai-Ga/LeetCode-Questions · GitHub

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/*
 * @lc app=leetcode id=72 lang=java
 *
 * [72] Edit Distance
 */

// @lc code=start
class Solution {
    public int minDistance(String word1, String word2) {
        int m = word1.length();
        int n = word2.length();

        //Creating a 2D array
        int[][] dp = new int [m+1][n+1];

        //Initializing dp[i][o]

        for (int i = 0; i <=m; i++) {
            dp[i][0]=i;
        }

        for (int j = 0; j <=n; j++) {
            dp[0][j]=j;
        }

        //Filling the dp array
        for (int i = 1; i <=m; i++) {
            for (int j = 1; j <=n; j++) {

                if(word1.charAt(i-1)==word2.charAt(j-1)){
                    dp[i][j]=dp[i-1][j-1];
                } else{
                    dp[i][j] = Math.min(Math.min(dp[i-1][j]+1, dp[i][j-1]+1),dp[i-1][j-1]+1);
                }
            }

        }
        return dp[m][n];
    }
}
// @lc code=end