Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
　　long int n,a,b;
　　cin >> n >> a >> b;
　　if (n%(a+b)==0){
　　    int count1 = n/(a+b);
　　    cout << count1*a << endl;
　　}
　　else{
　　    int ans = 0;
　　    int count2 = n/(a+b);
　　    ans += count2*a;
　　    if (n-count2*(a+b) <= a){
　　        ans += n-count2*(a+b);
　　    }
　　    else{
　　        ans += a;
　　    }
　　    cout << ans << endl;
　　}
}

Compiler output:
a.cc:5:1: error: extended character 　 is not valid in an identifier
    5 | 　　long int n,a,b;
      | ^
a.cc:5:1: error: extended character 　 is not valid in an identifier
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　　cin >> n >> a >> b;
      | ^
a.cc:6:1: error: extended character 　 is not valid in an identifier
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　　if (n%(a+b)==0){
      | ^
a.cc:7:1: error: extended character 　 is not valid in an identifier
a.cc:8:1: error: extended character 　 is not valid in an identifier
    8 | 　　    int count1 = n/(a+b);
      | ^
a.cc:8:1: error: extended character 　 is not valid in an identifier
a.cc:9:1: error: extended character 　 is not valid in an identifier
    9 | 　　    cout << count1*a << endl;
      | ^
a.cc:9:1: error: extended character 　 is not valid in an identifier
a.cc:10:1: error: extended character 　 is not valid in an identifier
   10 | 　　}
      | ^
a.cc:10:1: error: extended character 　 is not valid in an identifier
a.cc:11:1: error: extended character 　 is not valid in an identifier
   11 | 　　else{
      | ^
a.cc:11:1: error: extended character 　 is not valid in an identifier
a.cc:12:1: error: extended character 　 is not valid in an identifier
   12 | 　　    int ans = 0;
      | ^
a.cc:12:1: error: extended character 　 is not valid in an identifier
a.cc:13:1: error: extended character 　 is not valid in an identifier
   13 | 　　    int count2 = n/(a+b);
      | ^
a.cc:13:1: error: extended character 　 is not valid in an identifier
a.cc:14:1: error: extended character 　 is not valid in an identifier
   14 | 　　    ans += count2*a;
      | ^
a.cc:14:1: error: extended character 　 is not valid in an identifier
a.cc:15:1: error: extended character 　 is not valid in an identifier
   15 | 　　    if (n-count2*(a+b) <= a){
      | ^
a.cc:15:1: error: extended character 　 is not valid in an identifier
a.cc:16:1: error: extended character 　 is not valid in an identifier
   16 | 　　        ans += n-count2*(a+b);
      | ^
a.cc:16:1: error: extended character 　 is not valid in an identifier
a.cc:17:1: error: extended character 　 is not valid in an identifier
   17 | 　　    }
      | ^
a.cc:17:1: error: extended character 　 is not valid in an identifier
a.cc:18:1: error: extended character 　 is not valid in an identifier
   18 | 　　    else{
      | ^
a.cc:18:1: error: extended character 　 is not valid in an identifier
a.cc:19:1: error: extended character 　 is not valid in an identifier
   19 | 　　        ans += a;
      | ^
a.cc:19:1: error: extended character 　 is not valid in an identifier
a.cc:20:1: error: extended character 　 is not valid in an identifier
   20 | 　　    }
      | ^
a.cc:20:1: error: extended character 　 is not valid in an identifier
a.cc:21:1: error: extended character 　 is not valid in an identifier
   21 | 　　    cout << ans << endl;
      | ^
a.cc:21:1: error: extended character 　 is not valid in an identifier
a.cc:22:1: error: extended character 　 is not valid in an identifier
   22 | 　　}
      | ^
a.cc:22:1: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:5:1: error: '\U00003000\U00003000long' was not declared in this scope
    5 | 　　long int n,a,b;
      | ^~~~~~~~
a.cc:6:1: error: '\U00003000\U00003000cin' was not declared in this scope
    6 | 　　cin >> n >> a >> b;
      | ^~~~~~~
a.cc:6:12: error: 'n' was not declared in this scope; did you mean 'yn'?
    6 | 　　cin >> n >> a >> b;
      |            ^
      |            yn
a.cc:6:17: error: 'a' was not declared in this scope
    6 | 　　cin >> n >> a >> b;
      |                 ^
a.cc:6:22: error: 'b' was not declared in this scope
    6 | 　　cin >> n >> a >> b;
      |                      ^
a.cc:7:1: error: '\U00003000\U00003000if' was not declared in this scope
    7 | 　　if (n%(a+b)==0){
      | ^~~~~~
a.cc:11:1: error: '\U00003000\U00003000else' was not declared in this scope
   11 | 　　else{
      | ^~~~~~~~