Added 1840A - Cipher Shifer.cpp

Author: vikashpatel24

1840A - Cipher Shifer.cpp

@@ -0,0 +1,33 @@
+//                                 ॐ नमः शिवाय
+#include<bits/stdc++.h>
+using namespace std;
+#define ll long long
+ 
+// Code Written By: Vikash Patel
+// Codeforces Profile: https://codeforces.com/profile/vikashpatel
+ 
+int main()
+{
+    int t;
+    cin>>t;
+    while(t--)
+    {
+        int n;
+        cin>>n;
+        string s;
+        cin>>s;
+        string ans;
+        char temp = s[0];
+        for(int i=1; i<n; i++)
+        {
+            if(temp == s[i])
+            {
+                ans += s[i];
+                temp = s[i+1];
+                i++;
+            }
+        }
+        cout<<ans<<endl;
+    }
+    return 0;
+}