added-edit_distance-solution (#100)

Author: PraneshASP

cpp/_72.cpp

@@ -0,0 +1,26 @@
+
+//Problem Link : https://leetcode.com/problems/edit-distance/ 
+//Method : DP
+
+class Solution {
+public:
+    int minDistance(string word1, string word2) {
+        int n=word1.length();
+        int m=word2.length();
+        int dp[n+1][m+1];
+        for(int i=0;i<=n;i++){
+            for(int j=0;j<=m;j++){
+                if(i==0)
+                    dp[i][j]=j;
+                else if(j==0)
+                    dp[i][j]=i;
+                else if(word1[i-1]==word2[j-1])
+                    dp[i][j]=dp[i-1][j-1];
+                else
+                    dp[i][j]=1+min(dp[i-1][j],min(dp[i][j-1],dp[i-1][j-1]));
+                    
+            }
+        }
+        return dp[n][m];
+    }
+};