Language: C++

#include<bits/stdc++.h>

using names#include<bits/stdc++.h>
using namespace std;
long long n,m;
int main(){
	scanf("%lld%lld",&n,&m);
	if(n*2>m){
		printf("%lld\n",m/2);
		exit(0);
	}
	else{
		long long ans=n;
		m-=n*2;
		ans+=m/4;
		printf("%lld\n",ans);
	}
    return 0;
}pace std;
int main()
{
    long long s,c,n=0;
    scanf("%lld %lld",&s,&c);
    for(;;)
    if(s<0) {s++,c++,c++,n--; break;}
    else if(c<0) {c++,c++,n--; cout<<n<<endl; return 0;}
    else s--,c--,c--,n++;
    cout<<s+c/4+n<<endl;
    return 0;
}#include<bits/stdc++.h>
using namespace std;
long long n,m;
int main(){
	scanf("%lld%lld",&n,&m);
	if(n*2>m){
		printf("%lld\n",m/2);
		exit(0);
	}
	else{
		long long ans=n;
		m-=n*2;
		ans+=m/4;
		printf("%lld\n",ans);
	}
    return 0;
}

Compiler output:
a.cc:3:12: error: stray '#' in program
    3 | using names#include<bits/stdc++.h>
      |            ^
a.cc:30:2: error: stray '#' in program
   30 | }#include<bits/stdc++.h>
      |  ^
a.cc:3:7: error: expected nested-name-specifier before 'names'
    3 | using names#include<bits/stdc++.h>
      |       ^~~~~
a.cc:19:2: error: 'pace' does not name a type
   19 | }pace std;
      |  ^~~~
a.cc:20:5: error: redefinition of 'int main()'
   20 | int main()
      |     ^~~~
a.cc:6:5: note: 'int main()' previously defined here
    6 | int main(){
      |     ^~~~
a.cc: In function 'int main()':
a.cc:26:32: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   26 |     else if(c<0) {c++,c++,n--; cout<<n<<endl; return 0;}
      |                                ^~~~
      |                                std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:26:41: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   26 |     else if(c<0) {c++,c++,n--; cout<<n<<endl; return 0;}
      |                                         ^~~~
      |                                         std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:28:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   28 |     cout<<s+c/4+n<<endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:28:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   28 |     cout<<s+c/4+n<<endl;
      |                    ^~~~
      |                    std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc: At global scope:
a.cc:30:3: error: 'include' does not name a type
   30 | }#include<bits/stdc++.h>
      |   ^~~~~~~
a.cc:32:11: error: redefinition of 'long long int n'
   32 | long long n,m;
      |           ^
a.cc:5:11: note: 'long long int n' previously declared here
    5 | long long n,m;
      |           ^
a.cc:32:13: error: redefinition of 'long long int m'
   32 | long long n,m;
      |             ^
a.cc:5:13: note: 'long long int m' previously declared here
    5 | long long n,m;
      |             ^
a.cc:33:5: error: redefinition of 'int main()'
   33 | int main(){
      |     ^~~~
a.cc:6:5: note: 'int main()' previously defined here
    6 | int main(){
      |     ^~~~