Create 36_codechef_Encoding_message.cpp

Author: Prince-1501

36_codechef_Encoding_message.cpp

@@ -0,0 +1,69 @@
+//
+//  main.cpp
+//  Lecture 36
+//
+//  Created by Prince  Kumar on 17/04/19.
+//  Copyright © 2019 Prince  Kumar. All rights reserved.
+//
+//                      CODE-CHEF
+
+//       --- **    Problems on Encoding Message   ** ---       //
+
+
+#include <iostream>
+using namespace std;
+int main()
+{
+    int T; cin>>T;
+    while(T--)
+    {
+        int n; cin>>n; // lenght of string
+        string s; cin>>s;
+        
+        // 1st step of encoding
+        if(n%2==0)
+        {
+            // even
+            for(int i=0;i<n;i=i+2)  // len= 6 ; index -> 0 to 5
+            {
+                char z = s[i+1];  // z='h'
+                s[i+1] = s[i] ;  //
+                s[i]=z;
+            }
+        }
+        else
+        {
+            // odd
+            for(int i=0;i<n-1;i=i+2)
+            {
+                char z = s[i+1];  // z='h'
+                s[i+1] = s[i] ;  //
+                s[i]=z;
+            }
+        }
+        
+        // 2nd stage of encoding
+        
+        for(int i=0;i<n;i++)
+        {
+            char c = s[i];   // recent character  // b --> 98
+            //int index  =  s[i]-97;
+            int index  =  c-97;   // 1
+            int req = 25-index;   // 24
+            
+            //  range 97 to 122
+            req = req + 97;
+            char y = (char)req;  // real ASCII code
+            cout<<y;
+            
+        }
+        cout<<endl;
+        
+        
+        
+    }
+}
+
+
+
+