Add Two More Programs in the BackTracking Concept.

backtracking/Backtracking1.java

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+public class Backtracking1 {
+
+    public static void changeArray(int arr[], int i, int val){
+
+        if(i==arr.length){
+            printArray(arr);
+            return;
+        }
+
+        arr[i] = val;
+        changeArray(arr, i+1, val+1);
+        arr[i] = arr[i]-2;
+
+    }
+
+    public static void printArray(int arr[]){
+        for(int i=0;i<arr.length;i++){
+            System.out.print(arr[i]+" ");
+        }
+        System.out.println();
+    }
+
+    public static void main(String[] args) {
+        int arr[] = new int[5];
+        changeArray(arr, 0, 1);
+        printArray(arr);
+    }
+}

backtracking/Backtracking2.java

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+public class Backtracking2 {
+    public static void main(String[] args) {
+
+    }
+}