criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  int N,D;
  cin  >> N >> D;
  cout << (N + (2 * D) / (2 * D + 1) << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:38: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    7 |   cout << (N + (2 * D) / (2 * D + 1) << endl;
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
a.cc:7:45: error: expected ')' before ';' token
    7 |   cout << (N + (2 * D) / (2 * D + 1) << endl;
      |           ~                                 ^
      |                                             )
Language: C++

#include <iostream>
using namespace std;

int main() {
    int n, d;
    cin >> x;
    int x = 2 * d + 1;

    cout << (n + x - 1) / x;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: 'x' was not declared in this scope
    6 |     cin >> x;
      |            ^
Language: C++

int main(){
  int x, d;
  std::cin >> x >> d;
  int ans=  x/(2*d+1) + (int)((x%(2*d+1))?1:0);

  std::cout << ans << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:8: error: 'cin' is not a member of 'std'
    3 |   std::cin >> x >> d;
      |        ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | int main(){
a.cc:6:8: error: 'cout' is not a member of 'std'
    6 |   std::cout << ans << std::endl;
      |        ^~~~
a.cc:6:8: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:6:28: error: 'endl' is not a member of 'std'
    6 |   std::cout << ans << std::endl;
      |                            ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | int main(){
Language: C++

#include<iostream>
 
int main(){
  int x, d;
  std::cin >> x >> d;
  std::cout << x/(2*d+1) + (x%(2*d+1))?1:0 << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:44: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    6 |   std::cout << x/(2*d+1) + (x%(2*d+1))?1:0 << std::endl;
      |                                          ~~^~~~~~~~~~~~
Language: C++

#include<iostream>
 
int main(){
  int x, d;
  std::cin >> x >> d;
  std::cout << x/(2*d+1) + x%(2*d+1)?1:0 << std::endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:42: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    6 |   std::cout << x/(2*d+1) + x%(2*d+1)?1:0 << std::endl;
      |                                        ~~^~~~~~~~~~~~
Language: C++

#include<iostream>

int main(){
  int x, d;
  std::cin >> s >> d;
  cout << x/(2*d+1) + x%(2*d+1)?1:0 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:15: error: 's' was not declared in this scope
    5 |   std::cin >> s >> d;
      |               ^
a.cc:6:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   cout << x/(2*d+1) + x%(2*d+1)?1:0 << endl;
      |   ^~~~
      |   std::cout
In file included 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:6:40: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    6 |   cout << x/(2*d+1) + x%(2*d+1)?1:0 << endl;
      |                                        ^~~~
      |                                        std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C

#include <stdio.h>
int main(void){
	int n,d;
	scanf("%d%d",&n,&d);
	printf("%d",n/(2*d+1)+(n%(2*d+1)==0?0:1)));
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:50: error: expected ';' before ')' token
    5 |         printf("%d",n/(2*d+1)+(n%(2*d+1)==0?0:1)));
      |                                                  ^
      |                                                  ;
main.c:5:50: error: expected statement before ')' token
Language: C

#include <stdio.h>
int main(void){
	int n,d;
	scanf("%d%d",&n,&d);
	printf("%d",n/(2*d+(n%(2*d+1)==0?0:1));
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:47: error: expected ')' before ';' token
    5 |         printf("%d",n/(2*d+(n%(2*d+1)==0?0:1));
      |               ~                               ^
      |                                               )
main.c:6:18: error: expected ';' before '}' token
    6 |         return 0;
      |                  ^
      |                  ;
    7 | }
      | ~
Language: C++

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    
    int a , b; 
    cin >> a >> b;
    cout << int((a + 2 * b  / (2* b + 1));
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: expected primary-expression before 'int'
    9 |     cout << int((a + 2 * b  / (2* b + 1));
      |             ^~~
Language: C++

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    
    int a , b; 
    cin >> a >> b;
    cout << int((a + 2 * b  / (2* b + 1))<< endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:42: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    9 |     cout << int((a + 2 * b  / (2* b + 1))<< endl;
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = s; i < (int)(n); i++)
typedef long long ll;

int main() {
  int n,d;
  cin >> n >> d;
  cout << (2d+n)/2d+1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:12: error: unable to find numeric literal operator 'operator""d'
   10 |   cout << (2d+n)/2d+1 << endl;
      |            ^~
a.cc:10:18: error: unable to find numeric literal operator 'operator""d'
   10 |   cout << (2d+n)/2d+1 << endl;
      |                  ^~
Language: C++

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

int main(){
  int N,D;
  cin>>N>>d;
  cout<<(N-1)/(2*D+1)+1<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: 'd' was not declared in this scope
    6 |   cin>>N>>d;
      |           ^
Language: C++

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

int main () {
  int n,d;
  cin >>n>>d;
  int w =d*2 +1;
  int ans =(n+(w-1))w;

  cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:21: error: expected ',' or ';' before 'w'
    8 |   int ans =(n+(w-1))w;
      |                     ^
Language: C++

#include <iostream>
using namespace std;

int main(){
	int N, D;
    cin >> N >> D;
    
  	int range, i, count;
  	for (i=1; i< 10000000; i++){
        range = i*D + 1;
      	if (range > N){
          count = i;
          break
        }
    }
  	
  	cout << count;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:16: error: expected ';' before '}' token
   13 |           break
      |                ^
      |                ;
   14 |         }
      |         ~
Language: C++

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

 int main() {
   int N, D;
   cin >> N, D;

   cout << N/(1 + 2D) << '\n';
 }


Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: unable to find numeric literal operator 'operator""D'
    8 |    cout << N/(1 + 2D) << '\n';
      |                   ^~
Language: C++

#include<bits/stdc++.h>using namespace std;int main(void){int n,d;cin >> n >> d;cout << (n+2*d)/(2*d+1);}


Compiler output:
a.cc:1:30: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h>using namespace std;int main(void){int n,d;cin >> n >> d;cout << (n+2*d)/(2*d+1);}
      |                              ^~~~~~~~~
a.cc:1:9: fatal error: bits/stdc++.h>usin: No such file or directory
    1 | #include<bits/stdc++.h>using namespace std;int main(void){int n,d;cin >> n >> d;cout << (n+2*d)/(2*d+1);}
      |         ^~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C

/*
Golden Apple問題
N本の木があって、一人の監視員はi-D〜i+Dの2D+1本を監視することができる。
何人の監視員が必要か？？
*/
​
#include <stdio.h>
​
//プロトタイプ宣言
int main(void);
int need_number(int N, int D);
​
//定義
int need_number(int N,int D){
​
  int rem;
  int H; //必要な人数
​
  if ( N <= 2*D+1 ){ //一人で監視できる場合
    H = 1;
  }else{             //一人では監視できない場合
    rem = N % (2*D + 1);
    H = (N - rem)/(2*D + 1) + 1;
  }
​
  return H;
}
​
//本文
int main(void){
​
  int N,D;
  printf("何本のりんごの木がありますか？：");
  scanf("%d", &N);
  printf("\n");
​
  printf("監視員はi-Dからi+D番目の木を監視することができます。\n");
  printf("Dの値を入力してください：");
  scanf("%d", &D);
  printf("\n");
​
  printf("必要な監視員の数は%d人です。\n", need_number(N, D));
​
  return 0;
​
}

Compiler output:
main.c:6:1: error: expected ';' before 'typedef'
    6 | ​
      | ^
      | ;
main.c:8:1: error: expected ';' before 'int'
    8 | ​
      | ^
      | ;
    9 | //プロトタイプ宣言
   10 | int main(void);
      | ~~~
main.c:12:1: error: expected ';' before 'int'
   12 | ​
      | ^
      | ;
   13 | //定義
   14 | int need_number(int N,int D){
      | ~~~
main.c: In function 'need_number':
main.c:15:1: error: '\U0000200b' undeclared (first use in this function)
   15 | ​
      |  
main.c:15:1: note: each undeclared identifier is reported only once for each function it appears in
main.c:15:1: error: expected ';' before 'int'
   15 | ​
      | ^
      | ;
   16 |   int rem;
      |   ~~~
main.c:18:1: error: expected ';' before 'if'
   18 | ​
      | ^
      | ;
   19 |   if ( N <= 2*D+1 ){ //一人で監視できる場合
      |   ~~
main.c: At top level:
main.c:28:1: error: expected ';' before 'int'
   28 | ​
      | ^
      | ;
   29 | //本文
   30 | int main(void){
      | ~~~
main.c: In function 'main':
main.c:31:1: error: '\U0000200b' undeclared (first use in this function)
   31 | ​
      |  
main.c:31:1: error: expected ';' before 'int'
   31 | ​
      | ^
      | ;
   32 |   int N,D;
      |   ~~~
main.c:34:16: error: 'N' undeclared (first use in this function)
   34 |   scanf("%d", &N);
      |                ^
main.c:36:1: error: expected ';' before 'printf'
   36 | ​
      | ^
      | ;
   37 |   printf("監視員はi-Dからi+D番目の木を監視することができます。\n");
      |   ~~~~~~
main.c:39:16: error: 'D' undeclared (first use in this function)
   39 |   scanf("%d", &D);
      |                ^
main.c:41:1: error: expected ';' before 'printf'
   41 | ​
      | ^
      | ;
   42 |   printf("必要な監視員の数は%d人です。\n", need_number(N, D));
      |   ~~~~~~
main.c:43:1: error: expected ';' before 'return'
   43 | ​
      | ^
      | ;
   44 |   return 0;
      |   ~~~~~~
main.c:45:1: error: expected ';' before '}' token
   45 | ​
      | ^
      | ;
   46 | }
      | ~
Language: C++

n,d = map(int,input().split())
ans = 0
dis = 2*d +1

if (n % dis) == 0:
	ans = int(n / dis)
else:
	ans = int((n // dis)+1)

print(ans)


Compiler output:
a.cc:1:1: error: 'n' does not name a type
    1 | n,d = map(int,input().split())
      | ^
Language: C++


int main()
{
    int n,d,c=0;
    cin>>n>>d;
    for(int i=1;i<=n;i++){
        if(i-d>=1 && i+d<=n){
           
            c++;
        }
    }
    c==2?cout<<2:cout<<c/d;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope
    5 |     cin>>n>>d;
      |     ^~~
a.cc:12:10: error: 'cout' was not declared in this scope
   12 |     c==2?cout<<2:cout<<c/d;
      |          ^~~~
Language: C++

#include<iostream>
using nmaespace std;
int main()
{
  int n,d;
  cin>>n>>d;
  d=2*d+1;
  if(n%d==0) cout<<n/d;
  else cout<<(n/d)+1;
}


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'nmaespace'
    2 | using nmaespace std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin>>n>>d;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:14: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   if(n%d==0) cout<<n/d;
      |              ^~~~
      |              std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |   else cout<<(n/d)+1;
      |        ^~~~
      |        std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

using namespace std;

#define _GLIBCXX_DEBUG
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define chinko long long

using namespace std;


int main(){
	int n,d;
	cin>>n>>d;
	int ans=0;
	if(n<d){
			ans=1;
			return 0;
		}
	while(n>=0){
		n-=(d+1)*2;
		++ans;
	}
	cout<<ans<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:9: error: 'cin' was not declared in this scope
   12 |         cin>>n>>d;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:22:9: error: 'cout' was not declared in this scope
   22 |         cout<<ans<<endl;
      |         ^~~~
a.cc:22:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:22:20: error: 'endl' was not declared in this scope
   22 |         cout<<ans<<endl;
      |                    ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    int N,D,ans=0;
    cin >> N >> D;
    while(N){
        N = N-(D*2+1);
        ans++
    } 
    cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: expected ';' before '}' token
    8 |         ans++
      |              ^
      |              ;
    9 |     }
      |     ~
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
using namespace std;
int main(void){
  int N;
  int D;
  cin >> N;
  cin >> D;
  int k;
  k = 2*D+1;
  if(N%D == 0) cout << N/D << endl；
  if(N%D != 0) cout << N/D + 1 << endl;
return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:12:31: error: 'endl\U0000ff1b' was not declared in this scope
   12 |   if(N%D == 0) cout << N/D << endl；
      |                               ^~~~~~
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
using namespace std;
int main(void){
  int N;
  int D;
  cin >> N;
  cin >> D;
  int k;
  k = 2*D;1;
  if(N%D == 0) cout << N/D << endl；
  if(N%D != 0) cout << N/D + 1 << endl;
return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:12:31: error: 'endl\U0000ff1b' was not declared in this scope
   12 |   if(N%D == 0) cout << N/D << endl；
      |                               ^~~~~~
Language: C++

#include<iostream>main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}


Compiler output:
a.cc:1:23: warning: extra tokens at end of #include directive
    1 | #include<iostream>main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}
      |                       ^
a.cc:1:34: error: extended character 　 is not valid in an identifier
    1 | #include<iostream>main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}
      |                                  ^
a.cc:1:9: fatal error: iostream>mai: No such file or directory
    1 | #include<iostream>main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}
      |         ^~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}


Compiler output:
a.cc:2:16: error: extended character 　 is not valid in an identifier
    2 | main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}
      |                ^
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}
      | ^~~~
a.cc: In function 'int main()':
a.cc:2:16: error: '\U00003000std' has not been declared
    2 | main(){int a,b;　std::cin>> a >> b; b*=2; b += 1;std::cout << a/b+(a%b!=0) << std::endl;}
      |                ^~~~~
Language: C++

#include<iostream>
main(){
int a,b;　std::cin>> a >> b; b*=2; b += 1;
  std::cout << a/b+(a%b!=0) << std::endl;
}

Compiler output:
a.cc:3:9: error: extended character 　 is not valid in an identifier
    3 | int a,b;　std::cin>> a >> b; b*=2; b += 1;
      |         ^
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:3:9: error: '\U00003000std' has not been declared
    3 | int a,b;　std::cin>> a >> b; b*=2; b += 1;
      |         ^~~~~
Language: C

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

int main(void){
    int n = 0; 
    int d = 0;

    scanf("%d%d", &n, &d);

    if(n % (2 * d + 1) == 0){
        printf("%d\n", n / (2 * d + 1));
    }else{
        printf("%d\n", n / (2 * d + 1) + 1);
    }
    return 0;

} 


Compiler output:
main.c:2:10: fatal error: iostream: No such file or directory
    2 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

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

int main(void){
    int n = 0; 
    int d = 0;

    scanf("%d%d", &n, &d);

    if(n % (2 * d + 1) == 0){
        printf("%d\n", n / (2 * d + 1));
    }else{
        printf("%d\n", n / (2 * d + 1) + 1);
    }
    return 0;

} 

Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
using namespace std;

#define repr(i,a,b) for(int i=a; i<b; i++)

int main(void) {
  int N,D;
  cin >> N >> D;

  cout << (N+(2*D−1))/(2*D) << endl;
  return 0;
}

Compiler output:
a.cc:10:17: error: extended character − is not valid in an identifier
   10 |   cout << (N+(2*D−1))/(2*D) << endl;
      |                 ^
a.cc: In function 'int main()':
a.cc:10:17: error: 'D\U000022121' was not declared in this scope
   10 |   cout << (N+(2*D−1))/(2*D) << endl;
      |                 ^~~
Language: C++

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

int main() {
    int N, D;
    cin >> N >> D;
    int range = 2 * D + 1
    if(N % range == 0;){
    int number = N / range;
    } else {
        int number =  N / range + 1;
    }
    cout << number << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected ',' or ';' before 'if'
    8 |     if(N % range == 0;){
      |     ^~
a.cc:8:23: error: expected primary-expression before ')' token
    8 |     if(N % range == 0;){
      |                       ^
a.cc:10:7: error: 'else' without a previous 'if'
   10 |     } else {
      |       ^~~~
a.cc:13:13: error: 'number' was not declared in this scope
   13 |     cout << number << endl;
      |             ^~~~~~
Language: C++

#include <bits/stdc++.h>
#include <iostream>
#include <string>
#include <vector>

using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
typedef long long ll;

int main(){
  int n,d;
  cin >> n >> d;
  int ans = (n+2d)/2d+1;
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:16: error: unable to find numeric literal operator 'operator""d'
   13 |   int ans = (n+2d)/2d+1;
      |                ^~
a.cc:13:20: error: unable to find numeric literal operator 'operator""d'
   13 |   int ans = (n+2d)/2d+1;
      |                    ^~
Language: C++

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

int main(){
int N,D;
cin >> N >> D;
int a = 2*D + 1;
int b = N/a;
int c = N%a;

if(c == 0){
	cout << b << endl;
}
else{
	cout << b+1 << emdl;
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:24: error: 'emdl' was not declared in this scope
   15 |         cout << b+1 << emdl;
      |                        ^~~~
Language: C++

#include <stdio.h>
int main(){
	scanf("%d%d",&n,&m);
	m=(m*2)+1;
	if(n%m==0){
		printf("%d",&n/m)
	}
	if(n%m!=0){
		printf("%d",&(n/m)+1;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:23: error: 'n' was not declared in this scope
    3 |         scanf("%d%d",&n,&m);
      |                       ^
a.cc:3:26: error: 'm' was not declared in this scope
    3 |         scanf("%d%d",&n,&m);
      |                          ^
Language: C++

#include<iostream>
main(D){int N;std::cin>>N>>D;int c=0;while(N>0){N-=2*D+1;c++;}printf("%d\n",c);}


Compiler output:
a.cc:2:5: error: expected constructor, destructor, or type conversion before '(' token
    2 | main(D){int N;std::cin>>N>>D;int c=0;while(N>0){N-=2*D+1;c++;}printf("%d\n",c);}
      |     ^
Language: C

#include <bits/stdc++.h>

#define REP(i, n) for(size_t i = 0; i < n; ++i)

using namespace std;

int main() {
    int N, D;
    cin >> N >> D;
    int count = 0;
    while(N > 0) {
        N -= 2 * D + 1;
        count++;
    }
    cout << count << endl;
}


Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
    int N,D;
    cin >> N >> D;
    int ans;
    ans=N/(2*D+1));
    if (N%(2*D+1!=0)
    ans++;
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: expected ';' before ')' token
    8 |     ans=N/(2*D+1));
      |                  ^
      |                  ;
a.cc:9:21: error: expected ';' before 'ans'
    9 |     if (N%(2*D+1!=0)
      |                     ^
      |                     ;
   10 |     ans++;
      |     ~~~              
a.cc:11:24: error: expected ')' before ';' token
   11 |     cout << ans << endl;
      |                        ^
      |                        )
a.cc:9:8: note: to match this '('
    9 |     if (N%(2*D+1!=0)
      |        ^
Language: C++

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

int main() {
    int N,D;
    cin >> N >> D;
    int ans;
    ans=N/(2*D+1));
    if (N%(2*D+1!=0))
    ans++;
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: expected ';' before ')' token
    8 |     ans=N/(2*D+1));
      |                  ^
      |                  ;
Language: C++

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

int main() {
    int N,D;
    cin >> N >> D;
    int ans;
    ans=N/(2D+1));
    if (N%(2D+1!=0))
    ans++;
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: unable to find numeric literal operator 'operator""D'
    8 |     ans=N/(2D+1));
      |            ^~
a.cc:9:12: error: unable to find numeric literal operator 'operator""D'
    9 |     if (N%(2D+1!=0))
      |            ^~
Language: C++

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

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  
  int n, d;
  cin >> n >> d;
  if(n % (d * 2 + 1) == 0) {
    cout << n / (d * 2 + 1) << endl;
  }else {
    cout << (n / (d * 2 + 1)) + 1 << endl;
  }
}

Compiler output:
a.cc:1:10: fatal error: bits/stdc**.h: No such file or directory
    1 | #include <bits/stdc**.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    int N, D;
    cin >> N >> D;
    int ans = (N+2*D+)/(2*D+1);
    cout << ans;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:22: error: expected primary-expression before ')' token
    6 |     int ans = (N+2*D+)/(2*D+1);
      |                      ^
Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;

void solve() {
  int n, d;
  cin >> n >> d;
  int num = 1 ~ 2 * n;
  int ans = 0;
  while (d > 0) {
  	ans++;
    d -= num;
  }
  
  cout << ans << endl;
}

int main() {
  solve();
  return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:8:15: error: expected ',' or ';' before '~' token
    8 |   int num = 1 ~ 2 * n;
      |               ^
Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;

void solve() {
  int n, d;
  cin >> n >> d;
  int num = 1 ~ 2 * n;
  in ans = 0;
  while (d > 0) {
  	ans++;
    d -= num;
  }
  
  cout << ans << endl;
}

int main() {
  solve();
  return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:8:15: error: expected ',' or ';' before '~' token
    8 |   int num = 1 ~ 2 * n;
      |               ^
a.cc:9:3: error: 'in' was not declared in this scope; did you mean 'n'?
    9 |   in ans = 0;
      |   ^~
      |   n
a.cc:11:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   11 |         ans++;
      |         ^~~
      |         abs
a.cc:15:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   15 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

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

int main(){
  int n,d;
  cin >> n >> d;
  if(n%(2d+1)==0){
    cout << n/(2d+1);
  }else{
    cout << n/(2d+1)+1;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: unable to find numeric literal operator 'operator""d'
    7 |   if(n%(2d+1)==0){
      |         ^~
a.cc:8:16: error: unable to find numeric literal operator 'operator""d'
    8 |     cout << n/(2d+1);
      |                ^~
a.cc:10:16: error: unable to find numeric literal operator 'operator""d'
   10 |     cout << n/(2d+1)+1;
      |                ^~
Language: C++

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

int main(){
  int n,e;
  cin >> n >> e;
  if(n%(2e+1)==0){
    cout << n/(2e+1);
  }else{
    cout << n/(2e+1)+1;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'int' and 'double' to binary 'operator%'
    7 |   if(n%(2e+1)==0){
      |      ~^~~~~~~
      |      |  |
      |      |  double
      |      int
Language: C++

#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0; i < n; i++)
#define REPR(i, n) for(int i = n; i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)
#define INF 2e9
#define ALL(v) v.begin(), v.end()
using namespace std;
typedef long long ll;
int main()
{
  int N,D;
  cin >> N >> D;
  cout << N/(2D+1) + 1 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: unable to find numeric literal operator 'operator""D'
   13 |   cout << N/(2D+1) + 1 << endl;
      |              ^~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0;i < (n);++i)
#define all(x) (x).begin(),(x).end()
using namespace std;
typedef long long ll;

int main() {
  int n,d;
  cin >> n >> d;
  int m = 1;
  while(2dm+1 < n)m++;
  cout << m << endl;
    return 0;    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: unable to find numeric literal operator 'operator""dm'
   11 |   while(2dm+1 < n)m++;
      |         ^~~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0;i < (n);++i)
#define all(x) (x).begin(),(x).end()
using namespace std;
typedef long long ll;

int main() {
  int n,d;
  cin >> n >> d;
  int m = 0;
  while(2dm+1 < n)m++;
  cout << m << endl;
    return 0;    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: unable to find numeric literal operator 'operator""dm'
   11 |   while(2dm+1 < n)m++;
      |         ^~~
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <cstring>
#include <string>
#include <utility>


using namespace std;

class restaurant{
public:
	string city;
	int satis;
	int flag;

	restaurant(){ city = " "; satis = 0; flag = 0; }
	restaurant(const char *str, int num, int f){city = str; satis = -(num); flag = f;}
};

bool operator<(const restaurant &a, const restaurant &b){
	return a.city < b.city;
}

bool operator<(const restaurant &a, const restaurant &b){
	return a.satis < b.satis;
}

int main(){
	int n;
	cin >> n;
	restaurant ob1[100];
	for(int i = 0; i < n; i++){
		cin >> ob1[i].city;
		cin >> ob1[i].satis;
		ob1[i].flag = i+1;
	}

	sort(ob1,ob1+n);

	cout << endl;
	for(int i = 0; i< n; i++){
		cout << ob1[i].flag << endl;
	}
}


Compiler output:
a.cc:25:6: error: redefinition of 'bool operator<(const restaurant&, const restaurant&)'
   25 | bool operator<(const restaurant &a, const restaurant &b){
      |      ^~~~~~~~
a.cc:21:6: note: 'bool operator<(const restaurant&, const restaurant&)' previously defined here
   21 | bool operator<(const restaurant &a, const restaurant &b){
      |      ^~~~~~~~
Language: C++

#include <iostream>

using namespace std;

int main()
{
    long int N,D,k=9.v;
    cin>>N>>D;
    if(N%k) v=N/k+1;
    else v=N/k;
    cout<<v;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: unable to find numeric literal operator 'operator""v'
    7 |     long int N,D,k=9.v;
      |                    ^~~
a.cc:9:13: error: 'v' was not declared in this scope
    9 |     if(N%k) v=N/k+1;
      |             ^
a.cc:10:10: error: 'v' was not declared in this scope
   10 |     else v=N/k;
      |          ^
a.cc:11:11: error: 'v' was not declared in this scope
   11 |     cout<<v;
      |           ^
Language: Java

import java.util.Scanner;
public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = 0;
    for(i = 1;;i++){
      c += 2 * a + 1;
      if(a <= c){
        System.out.println(i);
        break;
      }
    }
  }
}

Compiler output:
Main.java:8: error: cannot find symbol
    for(i = 1;;i++){
        ^
  symbol:   variable i
  location: class Main
Main.java:8: error: cannot find symbol
    for(i = 1;;i++){
               ^
  symbol:   variable i
  location: class Main
Main.java:11: error: cannot find symbol
        System.out.println(i);
                           ^
  symbol:   variable i
  location: class Main
3 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  int S;
  cin >> N;
  cin >> D;
  if(N / ((D * 2) + 1) <= 1){
    cout << 1 << endl;
  }
  else if(N % ((D * 2) + 1) == 0){
    cout << N / ((D * 2) + 1) << endl;
  }
  else{
    cout << N / ((D * 2) + 1) + 1 << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: 'D' was not declared in this scope
    8 |   cin >> D;
      |          ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
main()
{
  float n,d;
  cin>>n>>d;
  float k=2*d+1;
  cout<<ceil(n/k):
}

Compiler output:
a.cc:3:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    3 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:8:18: error: expected ';' before ':' token
    8 |   cout<<ceil(n/k):
      |                  ^
      |                  ;
Language: C++

#include <iostream>

#define CDIV(X,Y) (((X)+(Y)-1)/(Y))

int main(void){
  int n,d;
  cin >> n >> d;
  cout << CDIV(n,2*d+1) << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin >> n >> d;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout << CDIV(n,2*d+1) << 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:8:28: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   cout << CDIV(n,2*d+1) << endl;
      |                            ^~~~
      |                            std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>

#define CDIV(X,Y) ((X)+(Y-1)/(Y))

int main(void){
  int n,d;
  cin >> n >> d;
  cout << CDIV(n,2*d+1) << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin >> n >> d;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout << CDIV(n,2*d+1) << 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:8:28: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   cout << CDIV(n,2*d+1) << endl;
      |                            ^~~~
      |                            std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a,b,n,d;
  cin>>n>>d;
  b=2*d+1
  cout<<n+d-1/d;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: expected ';' before 'cout'
    7 |   b=2*d+1
      |          ^
      |          ;
    8 |   cout<<n+d-1/d;
      |   ~~~~
Language: Java


import java.util.Scanner;

public class CP {
    
	public static void main(String[] args) {
		
        Scanner s = new Scanner (System.in);
        double n = s.nextInt();
        double d = s.nextInt();
        
        System.out.println((int) Math.ceil(n / (2 * d + 1)));
	}
}

Compiler output:
Main.java:4: error: class CP is public, should be declared in a file named CP.java
public class CP {
       ^
1 error
Language: C++

#include <iostream>
using namespace std ;

int main(){
  int N,D,ans;
  cin >> N >> D ;
  
  if(N % (2D+1)==0){
    ans = N/(2D+1) ;
  }else{
    ans = N/(2D+1)+1 ;
  }
  
  cout << ans ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: unable to find numeric literal operator 'operator""D'
    8 |   if(N % (2D+1)==0){
      |           ^~
a.cc:9:14: error: unable to find numeric literal operator 'operator""D'
    9 |     ans = N/(2D+1) ;
      |              ^~
a.cc:11:14: error: unable to find numeric literal operator 'operator""D'
   11 |     ans = N/(2D+1)+1 ;
      |              ^~
Language: C++

#include <iostream>
using namespace std ;

int main(){
  int N,D,ans;
  cin >> N >> D ;
  
  if(N%(2D+1)==0){
    ans = N/(2D+1) ;
  }else{
    ans = N/(2D+1)+1 ;
  }
  
  cout << ans ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: unable to find numeric literal operator 'operator""D'
    8 |   if(N%(2D+1)==0){
      |         ^~
a.cc:9:14: error: unable to find numeric literal operator 'operator""D'
    9 |     ans = N/(2D+1) ;
      |              ^~
a.cc:11:14: error: unable to find numeric literal operator 'operator""D'
   11 |     ans = N/(2D+1)+1 ;
      |              ^~
Language: C

#include <stdio.h>

int main()
{
  int n,d;
  scanf("%d %d",&n,&d);
  double x;
  
  x=n/(D*2+1)+0.99;
  int Ans;
  Ans=x;
  printf("%d",Ans);
}

Compiler output:
main.c: In function 'main':
main.c:9:8: error: 'D' undeclared (first use in this function)
    9 |   x=n/(D*2+1)+0.99;
      |        ^
main.c:9:8: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <stdio.h>

int main()
{
  int n,d;
  scanf("%d %d",&n,&d);
  double x;
  
  x=n/(D*2+1)+0.99;
  int Ans;
  Ans=x;
  printf("%d",Ans);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: 'D' was not declared in this scope
    9 |   x=n/(D*2+1)+0.99;
      |        ^
Language: C++

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

int main(){
    int n, d;
    cin >> n >> d;

    int ans = 0;
    int count = 0;
    for(int i = 0; i < 20; i++){
        ans += 2 * d + 1;
        count++
        if(ans >= n){
            break;
        }
    }

    cout << count << endl;
}

Compiler output:
a.cc:1:9: fatal error: bits/std++.h: No such file or directory
    1 | #include<bits/std++.h>
      |         ^~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include "pch.h"
#include <iostream>
#include <string>

using namespace std;

int main()
{
	int n;
	cin >> n;
	int d;
	cin >> d;

	int coverArea = 2 * d + 1;
	int answer = 0;

	if (n % coverArea == 0)
		answer = (n / coverArea);
	else
		answer = (n / coverArea) + 1;

	cout << answer;

	return 0;
}


Compiler output:
a.cc:1:10: fatal error: pch.h: No such file or directory
    1 | #include "pch.h"
      |          ^~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n,d;
  cin >> n >> d;
  
  cout << (n+2d) / (2d+1) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: unable to find numeric literal operator 'operator""d'
    8 |   cout << (n+2d) / (2d+1) << endl;
      |              ^~
a.cc:8:21: error: unable to find numeric literal operator 'operator""d'
    8 |   cout << (n+2d) / (2d+1) << endl;
      |                     ^~
Language: C++

#include <iostream>
using namespace std;
int main(){
  int N,D;cin>>N>>D;
  int ans=N/(2D+1)+1;
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:14: error: unable to find numeric literal operator 'operator""D'
    5 |   int ans=N/(2D+1)+1;
      |              ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
 
int main() {
　int n,d;
  cin>>n>>d;
  if(n%(2*d+1)==0){
    cout<<n/(2*d+1)<<endl;
  }
  else{
    cout<<n/(2*d+1)+1<<endl;
  }
}


Compiler output:
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　int n,d;
      | ^
a.cc: In function 'int main()':
a.cc:7:1: error: '\U00003000int' was not declared in this scope
    7 | 　int n,d;
      | ^~~~~
a.cc:8:8: error: 'n' was not declared in this scope; did you mean 'yn'?
    8 |   cin>>n>>d;
      |        ^
      |        yn
a.cc:8:11: error: 'd' was not declared in this scope
    8 |   cin>>n>>d;
      |           ^
Language: C

#include<iostream>
#include<string>
#include<cstring>
#include<cstdlib>
#include<cmath>
using namespace std;
 
int main() {
    int N, D;
    double X;
    cin >> N >> D;
    X = (double)N/(2*D+1) ;
    cout << ceil(X) << endl;
}

Compiler output:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#include<iostream>
#include<string>
#include<cstring>
#include<cstdlib>
using namespace std;
 
int main() {
    int N, D;
    double X;
    cin >> N >> D;
    X = (double)N/(2*D+1) ;
    cout << ceil(X) << endl;
}

Compiler output:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<string>
#include<cstring>
#include<cstdlib>
using namespace std;

int main() {
    int N, D;
    double X;
    cin >> N >> D;
    X = (double)N/(2*D+1) ;
    cout << ceil(X) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: 'ceil' was not declared in this scope
   12 |     cout << ceil(X) << endl;
      |             ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std; 
//typedef long long int ll; 

int main() {
  		int N, D;
  		cin>> N >> D;
  		int r =0; 
  		if( N % (2*D+1) != 0)  r=1  
        cout<< 1+ (N/(2*D+1)) <<endl;  
            }

Compiler output:
a.cc: In function 'int main()':
a.cc:9:43: error: expected ';' before 'cout'
    9 |                 if( N % (2*D+1) != 0)  r=1
      |                                           ^
      |                                           ;
   10 |         cout<< 1+ (N/(2*D+1)) <<endl;
      |         ~~~~
Language: C++

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

int main () {
  int n, d, ans; cin >> n >> d;
    ans = n / (2d+1);
  if (n % (2d+1) != 0)
    ans++;
  cout << ans;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:16: error: unable to find numeric literal operator 'operator""d'
    6 |     ans = n / (2d+1);
      |                ^~
a.cc:7:12: error: unable to find numeric literal operator 'operator""d'
    7 |   if (n % (2d+1) != 0)
      |            ^~
Language: C++

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

int main(int argc, char const *argv[])
{
    int n, d;
    cin >> n >> d;
    cout << ceil((n / float(2 * d + 1)) << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:8:41: error: invalid operands of types 'float' and '<unresolved overloaded function type>' to binary 'operator<<'
    8 |     cout << ceil((n / float(2 * d + 1)) << endl;
      |                  ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
Language: C

int main(void)
{
  int n,d;
  scanf("%d %d",&n,&d);
  d=d*2+1;
  printf("%d",(n-1)/d+1);
  return 0
}

Compiler output:
main.c: In function 'main':
main.c:4:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    4 |   scanf("%d %d",&n,&d);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main(void)
main.c:4:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    4 |   scanf("%d %d",&n,&d);
      |   ^~~~~
main.c:4:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:6:3: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    6 |   printf("%d",(n-1)/d+1);
      |   ^~~~~~
main.c:6:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:6:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:6:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:11: error: expected ';' before '}' token
    7 |   return 0
      |           ^
      |           ;
    8 | }
      | ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
  int N;
  int D;
  cin >> N >> D;
  
  int s = N/2*D;
  
  if (N >2*D) {
    cout << s+1;
  }
  
  if else (N==2*D) {
    cout << s;
  }
  
  else {
    cout << 1;
  }
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:6: error: expected '(' before 'else'
   15 |   if else (N==2*D) {
      |      ^~~~
      |      (
a.cc:19:3: error: 'else' without a previous 'if'
   19 |   else {
      |   ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
  int N;
  int D;
  cin >> N >> D;
  
  int s = N/2D;
  
  if (N >2D) {
    cout << s+1;
  }
  
  if else (N==2D) {
    cout << s;
  }
  
  else {
    cout << 1;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: unable to find numeric literal operator 'operator""D'
    9 |   int s = N/2D;
      |             ^~
a.cc:11:10: error: unable to find numeric literal operator 'operator""D'
   11 |   if (N >2D) {
      |          ^~
a.cc:15:6: error: expected '(' before 'else'
   15 |   if else (N==2D) {
      |      ^~~~
      |      (
a.cc:19:3: error: 'else' without a previous 'if'
   19 |   else {
      |   ^~~~
Language: C++

#include <stdio.h>
int main(void)
{
	int N, D, P;

	scanf("%d %d", &N, &D);

	P = N / (1 + D * 2);

	if (N % (1 + D * 2) == 0)
	{
		printf("%d", P);
	}
	else
	{
		print("%d", P + 1);
	}

	return 0;



Compiler output:
a.cc: In function 'int main()':
a.cc:16:17: error: 'print' was not declared in this scope; did you mean 'printf'?
   16 |                 print("%d", P + 1);
      |                 ^~~~~
      |                 printf
a.cc:19:18: error: expected '}' at end of input
   19 |         return 0;
      |                  ^
a.cc:3:1: note: to match this '{'
    3 | {
      | ^
Language: C++

#include<stdio.h>
int main(void)
{
	int N, D, P;
	scanf("%d %d", &N, &D);
	P = N / (1 + D * 2);
	if (N % (1 + D * 2) == 0)
	{
		printf("%d", P);
	}
	else
	{
		print("%d", P+1);
	}

	return 0;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:17: error: 'print' was not declared in this scope; did you mean 'printf'?
   13 |                 print("%d", P+1);
      |                 ^~~~~
      |                 printf
Language: C++

#include<stdio.h>
int main(void)
{
	int N, D;
	int K;
	int P = 1;
	scanf("%d %d", &N, &D);
	while (K >= N) {
		K = 1 + D * 2;
		P++;
	}
	printf("%d", P);

	return 0;



Compiler output:
a.cc: In function 'int main()':
a.cc:14:18: error: expected '}' at end of input
   14 |         return 0;
      |                  ^
a.cc:3:1: note: to match this '{'
    3 | {
      | ^
Language: C++

#include<stdio.h>
int main(void)
{
	int N, D;
	int K;
	int P == 1;
	scanf("%d %d", &N, &D);
	while (K>=N) {
		K = 1 + D * 2;
		P++;
	}
	printf("%d", P);
	
	return 0;
	

}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: expected initializer before '==' token
    6 |         int P == 1;
      |               ^~
a.cc:10:17: error: 'P' was not declared in this scope
   10 |                 P++;
      |                 ^
a.cc:12:22: error: 'P' was not declared in this scope
   12 |         printf("%d", P);
      |                      ^
Language: C++

#include <iostream>

using namespace std;

int main()
{
    int n,d;
    cin>>n>>d;
    int i=d+1,count=0;
    while((i-d)<=n
    {
        count++;
        i+= 2*d + 1;
    }
    cout<<count<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: expected ')' before '{' token
   10 |     while((i-d)<=n
      |          ~        ^
      |                   )
   11 |     {
      |     ~
Language: C++

#include <iostream>

int main(int argc, char** argv)
{
    int N, D;
    std::cin >> N >> D;

    std::cout << (N / (2 * d + 1) + 1) << std::endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:8:28: error: 'd' was not declared in this scope
    8 |     std::cout << (N / (2 * d + 1) + 1) << std::endl;
      |                            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n,d,s;
  cin >> n >> d;
  
  d = d * 2 + 1;
  n = n / d;
  s = 0;
  if (d%n>1){
   s = 1;
  }
  if (n >= d){
    cout << 1;
  }else if {
  cout << n + s;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:12: error: expected '(' before '{' token
   16 |   }else if {
      |            ^
      |            (
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n,d,s;
  cin >> n >> d;
  
  d = d * 2 + 1;
  int n = n / d;
  s = 0;
  if (d%n>1){
   s = 1;
  }
  cout << n + s;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: redeclaration of 'int n'
    9 |   int n = n / d;
      |       ^
a.cc:5:7: note: 'int n' previously declared here
    5 |   int n,d,s;
      |       ^