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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using namespace std;
  5.  
  6. string decode_message(int n, string msg) {
  7.     if (msg.empty() || msg == "NULL") {
  8.         return "NULL";
  9.     }
  10.  
  11.     string decoded_message = "";
  12.     bool dot_encountered = false;
  13.     for (int i = 0; i < msg.length(); ++i) {
  14.         if (msg[i] == '-') {
  15.             decoded_message += ' ';
  16.         } else if (msg[i] == '#' && i + 1 < msg.length() && isdigit(msg[i + 1])) {
  17.             decoded_message += static_cast<char>(msg[i + 1] - '0' + 64);
  18.             ++i; // Skip the number character
  19.         } else if (msg[i] == '.') {
  20.             decoded_message += '.';
  21.             dot_encountered = true;
  22.         } else if (msg[i] == '_') {
  23.             decoded_message += ' ';
  24.         } else if (isdigit(msg[i])) {
  25.             if (dot_encountered) {
  26.                 decoded_message += msg[i];
  27.             } else {
  28.                 decoded_message += static_cast<char>(msg[i] - '0' + 64);
  29.             }
  30.         }
  31.     }
  32.  
  33.     for (char& c : decoded_message) {
  34.         c = toupper(c);
  35.     }
  36.  
  37.     return decoded_message;
  38. }
  39.  
  40. int main() {
  41.     int n;
  42.     string msg;
  43.  
  44.     cin >> n;
  45.     cin.ignore(); // Ignore newline character after reading integer
  46.     getline(cin, msg);
  47.  
  48.     cout << decode_message(n, msg) << endl;
  49.  
  50.     return 0;
  51. }
  52.  
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin 
24
2 1 4 _ 3 1 2 0 _ @ # 459
stdout 
BAD CAB@ DEI
https://ideone.com/G9bRmU
language:
C++ (gcc 8.3)
created:
15 days ago
visibility:
public

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