4.22 LAB Countdown until matching digits.txt

#include <iostream>
using namespace std;

int main() {

   int userNum;
   int validNum;
   
   cin >> userNum;
   
   if((userNum < 11) || (userNum > 100)){
      cout << "Input must be 11-100" << endl;
      exit(0);
   }
  
   for(int i = userNum; userNum >= 11; i--){
      cout << i << " ";
      if (i % 11 == 0){
         cout << endl;
         break;
      }
   }


   return 0;
}