Added solution for shuffle the array. (#385)

Author: Xtha-Sunil

C++/shuffle-the-array.cpp

@@ -0,0 +1,25 @@
+class Solution {
+public:
+    vector<int> shuffle(vector<int>& nums, int n) {
+       for(int i=0;i<n;i++){
+        nums[i]=nums[i]<<10;
+        nums[i]=nums[i]|nums[i+n];
+       }
+       int ptr=2*n-1;
+ 
+      for(int i=n-1;i>=0;i--){
+         int y =nums[i]&((1<<10)-1);
+         int x =nums[i]>>10;
+         nums[ptr]=y;
+         nums[ptr-1]=x;
+         ptr-=2;
+       }
+       return nums;
+    }
+};
+auto init=[](){
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+    cout.tie(nullptr);
+    return 'c';
+}();