String Operations Count Program (#179)

Co-authored-by: Hemant Suthar <hemantsuthar20@gmail.com>

Author: Priyanka94suthaar

Java/June-LeetCoding-Challenge/StringOperationsCount.java

@@ -0,0 +1,54 @@
+public class StringOperationsCount {
+    public static void main(String[] args) {
+        // NOTE: The following input values will be used for testing your solution.
+        // Should return true if inserting a single char, deleting it or replacing it.
+        System.out.println(isOneAway("abcde", "abcd"));  // should return true
+        System.out.println(isOneAway("abde", "abcde"));  // should return true
+        System.out.println(isOneAway("a", "a"));  // should return
+        System.out.println(isOneAway("a", "b"));  // should return true
+        System.out.println(isOneAway("abcdef", "abqdef"));  // should return true
+        System.out.println(isOneAway("abcdef", "abccef"));  // should return true
+        System.out.println(isOneAway("abcdef", "abcde"));  // should return true
+        System.out.println(isOneAway("aaa", "abc"));  // should return false beacuse its two character replace
+        System.out.println(isOneAway("abcde", "abc"));  // should return false
+        System.out.println(isOneAway("abc", "abcde"));  // should return false
+        System.out.println(isOneAway("abc", "bcc"));  // should return false
+    }
+
+    // Implement your solution below.
+    public static Boolean isOneAway(String s1, String s2) {
+        boolean bool = false;
+        int s1Length = s1.length();
+        int s2Length = s2.length();
+        int editDistance = getEditDistance(s1, s2,s1Length,s2Length);
+        if(editDistance>1)
+                return false;
+            else
+                return true;
+    }
+
+    private static int getEditDistance(String s1, String s2,int s1Length, int s2Length) {
+
+        if(s1Length==0){
+            return s2Length;
+        }
+        if(s2Length==0){
+            return s1Length;
+        }
+        if(s1.charAt(s1Length-1)== s2.charAt(s2Length-1))
+            return getEditDistance(s1,s2,s1Length-1,s2Length-1);
+
+        return 1+ min(getEditDistance(s1,s2,s1Length,s2Length-1)
+                ,getEditDistance(s1,s2,s1Length-1,s2Length),
+                getEditDistance(s1,s2,s1Length-1,s2Length-1));
+    }
+
+    private static int min(int x, int y, int z) {
+        if (x <= y && x <= z)
+            return x;
+        if (y <= x && y <= z)
+            return y;
+        else
+            return z;
+    }
+}