Create 31 - Edit Distance.cpp

Author: sudhir5595

31 - Edit Distance.cpp

@@ -0,0 +1,28 @@
+class Solution {
+public:
+    int minDistance(string word1, string word2) {
+        
+        vector < vector <int> > dp(word1.size()+1, vector <int> (word2.size()+1, 0));
+        
+        for(int i = 1; i<=word1.size(); i++){
+            dp[i][0] = dp[i-1][0] + 1;
+        }
+
+        for(int i = 1; i<=word2.size(); i++){
+            dp[0][i] = dp[0][i-1] + 1;
+        }
+        
+        for(int i = 1; i<=word1.size(); i++){
+            for(int j = 1; j<=word2.size(); j++){
+                if(word1[i-1] != word2[j-1]){
+                    dp[i][j] = min(dp[i-1][j-1], min(dp[i-1][j], dp[i][j-1])) + 1;
+                }
+                else{
+                    dp[i][j] = dp[i-1][j-1];
+                }
+            }
+        }
+        
+        return dp[word1.size()][word2.size()];
+    }
+};