update

Author: genkimaru

src/main/java/com/leetcode/matrix/MatrixQuiz.java renamed to src/main/java/com/leetcode/matrix/MatrixOne.java

@@ -2,7 +2,7 @@
 
 import java.util.ArrayList;
 
-public class MatrixQuiz {
+public class MatrixOne {
 
     public void setZeroes(int[][] matrix) {
 
@@ -54,7 +54,7 @@ public static void main(String[] args) {
         //int[][] matrix = {{1,1,1},{1,0,1},{1,1,1}};
         // int[][] matrix = {{0,1,2,0},{3,4,5,2},{1,3,1,5}};
         int[][] matrix = {{1, 0}};
-        new MatrixQuiz().setZeroes(matrix);
+        new MatrixOne().setZeroes(matrix);
         for (int[] row : matrix) {
             System.out.print("[ ");
             for (int element : row) {

src/main/java/com/leetcode/recursion/RecursionOneS.java

@@ -0,0 +1,29 @@
+package com.leetcode.recursion;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class RecursionOneS {
+
+
+    public static void main(String[] args) {
+        String s = "abc";
+        RecursionOneS recursionOneS = new RecursionOneS();
+        List<String> result = new ArrayList<>();
+        recursionOneS.permutate(s, "", result);
+        for (String ele : result) {
+            System.out.println(ele);
+        }
+    }
+
+    private void permutate(String s, String prefix, List<String> result) {
+
+        if (s.isEmpty()) {
+            result.add(prefix);
+        }
+        for (int i = 0; i < s.length(); i++) {
+            permutate(s.substring(0, i) + s.substring(i + 1), prefix + String.valueOf(s.charAt(i)), result);
+        }
+
+    }
+}