Language: C++

                                                                       
#include <iostream>                                                                                                                      
#include <vector>                                                                                                                        
#include <algorithm>                                                                                                                     
using namespace std;                                                                                                                     
                                                                                                                                         
int main() {                                                                                                                             
  long long X, K, D;                                                                                                                     
  cin >> X >> K >> D;                                                                                                                    
                                                                                                                                         
  long long tmp = abs(X) - K*D;                                                                                                          
  long long check = 0;                                                                                                                   
  long long min = 0;                                                                                                                     
                                                                                                                                         
  if (tmp >= 0) min = abs(X) - K*D;                                                                                                      
  else {                                                                                                                                 
    for (int i = 1; i <= K; i++) {                                                                                                       
      tmp = abs(X) - i*D;                                                                                                                
      if (tmp < 0) {check = i; break;}                                                                                                   
    }                                                                                                                                    
    //cout << "check:" << check << endl;                                                                                                 
    if (abs(aFile Edit Options Buffers Tools Complete In/Out Signals Help                                                                             
#include <iostream>                                                                                                                      
#include <vector>                                                                                                                        
#include <algorithm>                                                                                                                     
using namespace std;                                                                                                                     
                                                                                                                                         
int main() {                                                                                                                             
  long long X, K, D;                                                                                                                     
  cin >> X >> K >> D;                                                                                                                    
                                                                                                                                         
  long long tmp = abs(X) - K*D;                                                                                                          
  long long check = 0;                                                                                                                   
  long long min = 0;                                                                                                                     
                                                                                                                                         
  if (tmp >= 0) min = abs(X) - K*D;                                                                                                      
  else {                                                                                                                                 
    for (int i = 1; i <= K; i++) {                                                                                                       
      tmp = abs(X) - i*D;                                                                                                                
      if (tmp < 0) {check = i; break;}                                                                                                   
    }                                                                                                                                    
    //cout << "check:" << check << endl;                                                                                                 
    if (abs(abs(X) - check*D) < abs(abs(X) - (check-1)*D)) min = abs(X) - check*D;                                                       
    else min = abs(X) - (check-1)*D;                                                                                                     
  }                                                                                                                                      
                                                                                                                                         
                                                                                                                                         
  cout << abs(min) << endl;                                                                                                              
                                                                                                                                         
  return 0;                                                                                                                              
}    bs(X) - check*D) < abs(abs(X) - (check-1)*D)) min = abs(X) - check*D;                                                       
    else min = abs(X) - (check-1)*D;                                                                                                     
  }                                                                                                                                      
                                                                                                                                         
                                                                                                                                         
  cout << abs(min) << endl;                                                                                                              
                                                                                                                                         
  return 0;                                                                                                                              
}    

Compiler output:
a.cc: In function 'int main()':
a.cc:22:13: error: 'aFile' was not declared in this scope
   22 |     if (abs(aFile Edit Options Buffers Tools Complete In/Out Signals Help
      |             ^~~~~
a.cc:26:20: error: expected ')' before ';' token
   26 | using namespace std;
      |                    ^
      |                    )
a.cc:22:8: note: to match this '('
   22 |     if (abs(aFile Edit Options Buffers Tools Complete In/Out Signals Help
      |        ^
a.cc:28:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   28 | int main() {
      |         ^~
a.cc:28:9: note: remove parentheses to default-initialize a variable
   28 | int main() {
      |         ^~
      |         --
a.cc:28:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:28:12: error: a function-definition is not allowed here before '{' token
   28 | int main() {
      |            ^
a.cc:51:6: error: 'bs' was not declared in this scope; did you mean 'abs'?
   51 | }    bs(X) - check*D) < abs(abs(X) - (check-1)*D)) min = abs(X) - check*D;
      |      ^~
      |      abs
a.cc:52:5: error: 'else' without a previous 'if'
   52 |     else min = abs(X) - (check-1)*D;
      |     ^~~~