Create EditDistance.java

Author: harshithasudhakar

Dynamic Programming/2D/Strings/EditDistance.java

@@ -0,0 +1,30 @@
+class EditDistance {
+    public int minDistance(String word1, String word2) {
+        int n = word1.length();
+        int m = word2.length();
+
+        int[][] dp = new int[n+1][m+1];
+
+        for(int i = 0; i<n+1; i++){
+            for(int j = 0; j<m+1; j++){
+                if(i == 0){
+                    dp[0][j] = j;
+                    continue;
+                }
+                if(j == 0){
+                    dp[i][0] = i;
+                    continue;
+                }
+
+                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(1+dp[i-1][j-1], 1+dp[i-1][j]), 1+dp[i][j-1]);
+                }
+            }
+        }
+
+        return dp[n][m];
+    }
+}