Language: C++

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

int main() {
	int m,n,a,sum=0,sim=0;
	cin>>n;
	m=n;
	int i=0;
	while(n!=0){
		a=9;
	 　　while(1){
	 　　	if(n<a){
	 　　	
	 　　		n-=a/9;
	 　　		sum+=;
	 　　		break;
	 　　	}
	 　　	
	 　　}
	}
	while(m!=0){
		a=6;
	 　　while(1){
	 　　	if(m<a){
	 　　	
	 　　		n-=a/6;
	 　　		sim+=;
	 　　		break;
	 　　	}
	 　　	
	 　　}
	}
	cout<<min(sim,sum)<<endl;
	return 0;
}

Compiler output:
a.cc:12:10: error: extended character 　 is not valid in an identifier
   12 |          　　while(1){
      |          ^
a.cc:12:10: error: extended character 　 is not valid in an identifier
a.cc:13:10: error: extended character 　 is not valid in an identifier
   13 |          　　   if(n<a){
      |          ^
a.cc:13:10: error: extended character 　 is not valid in an identifier
a.cc:14:10: error: extended character 　 is not valid in an identifier
   14 |          　　
      |          ^
a.cc:14:10: error: extended character 　 is not valid in an identifier
a.cc:15:10: error: extended character 　 is not valid in an identifier
   15 |          　　           n-=a/9;
      |          ^
a.cc:15:10: error: extended character 　 is not valid in an identifier
a.cc:16:10: error: extended character 　 is not valid in an identifier
   16 |          　　           sum+=;
      |          ^
a.cc:16:10: error: extended character 　 is not valid in an identifier
a.cc:17:10: error: extended character 　 is not valid in an identifier
   17 |          　　           break;
      |          ^
a.cc:17:10: error: extended character 　 is not valid in an identifier
a.cc:18:10: error: extended character 　 is not valid in an identifier
   18 |          　　   }
      |          ^
a.cc:18:10: error: extended character 　 is not valid in an identifier
a.cc:19:10: error: extended character 　 is not valid in an identifier
   19 |          　　
      |          ^
a.cc:19:10: error: extended character 　 is not valid in an identifier
a.cc:20:10: error: extended character 　 is not valid in an identifier
   20 |          　　}
      |          ^
a.cc:20:10: error: extended character 　 is not valid in an identifier
a.cc:24:10: error: extended character 　 is not valid in an identifier
   24 |          　　while(1){
      |          ^
a.cc:24:10: error: extended character 　 is not valid in an identifier
a.cc:25:10: error: extended character 　 is not valid in an identifier
   25 |          　　   if(m<a){
      |          ^
a.cc:25:10: error: extended character 　 is not valid in an identifier
a.cc:26:10: error: extended character 　 is not valid in an identifier
   26 |          　　
      |          ^
a.cc:26:10: error: extended character 　 is not valid in an identifier
a.cc:27:10: error: extended character 　 is not valid in an identifier
   27 |          　　           n-=a/6;
      |          ^
a.cc:27:10: error: extended character 　 is not valid in an identifier
a.cc:28:10: error: extended character 　 is not valid in an identifier
   28 |          　　           sim+=;
      |          ^
a.cc:28:10: error: extended character 　 is not valid in an identifier
a.cc:29:10: error: extended character 　 is not valid in an identifier
   29 |          　　           break;
      |          ^
a.cc:29:10: error: extended character 　 is not valid in an identifier
a.cc:30:10: error: extended character 　 is not valid in an identifier
   30 |          　　   }
      |          ^
a.cc:30:10: error: extended character 　 is not valid in an identifier
a.cc:31:10: error: extended character 　 is not valid in an identifier
   31 |          　　
      |          ^
a.cc:31:10: error: extended character 　 is not valid in an identifier
a.cc:32:10: error: extended character 　 is not valid in an identifier
   32 |          　　}
      |          ^
a.cc:32:10: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:12:10: error: '\U00003000\U00003000while' was not declared in this scope
   12 |          　　while(1){
      |          ^~~~~~~~~
a.cc:24:10: error: '\U00003000\U00003000while' was not declared in this scope
   24 |          　　while(1){
      |          ^~~~~~~~~