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

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


    cout << ceil((float)n/(2*d)) << endl;



    return 0;
    




}


Compiler output:
a.cc: In function 'int main()':
a.cc:2:17: error: 'cin' was not declared in this scope
    2 |         int n,d;cin >> n >>d;
      |                 ^~~
a.cc:5:5: error: 'cout' was not declared in this scope
    5 |     cout << ceil((float)n/(2*d)) << endl;
      |     ^~~~
a.cc:5:13: error: 'ceil' was not declared in this scope
    5 |     cout << ceil((float)n/(2*d)) << endl;
      |             ^~~~
a.cc:5:37: error: 'endl' was not declared in this scope
    5 |     cout << ceil((float)n/(2*d)) << endl;
      |                                     ^~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:27: error: expected ')' before 'if'
    7 |   cout << (n / (2*d+1) + 1 if (n%d>0)) << endl;
      |           ~               ^~~
      |                           )
Language: C++

#include <iostream>

using namespace std;

int main()
{
  int N, D;
  
  cin >> N >> D;
  
  cout << N / (D*2) + (N%(D*2))?1:0 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:37: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   11 |   cout << N / (D*2) + (N%(D*2))?1:0 << endl;
      |                                   ~~^~~~~~~
Language: C

#include<stdio.h>

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

Compiler output:
main.c: In function 'main':
main.c:6:23: error: invalid suffix "d" on integer constant
    6 |   printf("%d", (n-1)/(2d+1)+1);
      |                       ^~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: unable to find numeric literal operator 'operator""D'
    7 |   cout << (2D+N)/(2D+1) << endl;
      |            ^~
a.cc:7:19: error: unable to find numeric literal operator 'operator""D'
    7 |   cout << (2D+N)/(2D+1) << endl;
      |                   ^~
Language: C

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int N,D;

int main(int argc, char *argv[]) {
	int i;
	int ret;

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

	printf("%d\n", (int)ceil((double)N/(2*D+1)));

}


Compiler output:
main.c: In function 'main':
main.c:11:9: error: 'sr' undeclared (first use in this function)
   11 |         sr=scanf("%d %d", &N, &D);
      |         ^~
main.c:11:9: note: each undeclared identifier is reported only once for each function it appears in
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int d = sc.nextInt();
      double x = Math.ceil(n/(2*d+1));
      int y = (int) x
      System.out.println(y);
    }
}


Compiler output:
Main.java:8: error: ';' expected
      int y = (int) x
                     ^
1 error
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int d = sc.nextInt();
      int x = Math.ceil(n/(2*d+1));
      System.out.println(x);
    }
}


Compiler output:
Main.java:7: error: incompatible types: possible lossy conversion from double to int
      int x = Math.ceil(n/(2*d+1));
                       ^
1 error
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int d = sc.nextInt();
      int num = (int) n/(2*d+1)
      if(n/(2*d+1) == (int)n/(2*d+1))
      System.out.println(num);
      else
      System.out.println(num+1);
    }
}


Compiler output:
Main.java:7: error: ';' expected
      int num = (int) n/(2*d+1)
                               ^
1 error
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:8: error: unable to find numeric literal operator 'operator""d'
    7 |   if(n%2d==0) cout<<n/2d<<endl;
      |        ^~
a.cc:7:23: error: unable to find numeric literal operator 'operator""d'
    7 |   if(n%2d==0) cout<<n/2d<<endl;
      |                       ^~
a.cc:8:16: error: unable to find numeric literal operator 'operator""d'
    8 |   else cout<<n/2d+1<<endl;
      |                ^~
Language: C++

#include <iostream>
#include <cmath>
int main(int argc, char *argv[]){
  unsigned int N,D;
  std::cin >> N >> D;
  unsigned int W = 2*D+1
  std::cout << std::ceil(N/W) << std::endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:7:3: error: expected ',' or ';' before 'std'
    7 |   std::cout << std::ceil(N/W) << std::endl;
      |   ^~~
Language: C++

import math
s=input().split()
n=math.ceil(int(s[0])/(2*int(s[1])+1))
print(n)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include<bits/stdc++.h>
using namespace std;
#defing ll long long 
int main(){
  ll n,d;
  cin>>n>>d;
  ll ans = (ll)ceil((double)n/d/2));
  cout<<ans<<"\n";
  return 0;
}

Compiler output:
a.cc:3:2: error: invalid preprocessing directive #defing; did you mean #define?
    3 | #defing ll long long
      |  ^~~~~~
      |  define
a.cc: In function 'int main()':
a.cc:5:3: error: 'll' was not declared in this scope
    5 |   ll n,d;
      |   ^~
a.cc:6:8: error: 'n' was not declared in this scope; did you mean 'yn'?
    6 |   cin>>n>>d;
      |        ^
      |        yn
a.cc:6:11: error: 'd' was not declared in this scope
    6 |   cin>>n>>d;
      |           ^
a.cc:7:5: error: expected ';' before 'ans'
    7 |   ll ans = (ll)ceil((double)n/d/2));
      |     ^~~~
      |     ;
a.cc:8:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
    8 |   cout<<ans<<"\n";
      |         ^~~
      |         abs
Language: C++

//   __________________
//  | ________________ |
//  ||          ____  ||
//  ||   /\    |      ||
//  ||  /__\   |      ||
//  || /    \  |____  ||
//  ||________________||
//  |__________________|
//  \\#################\\
//   \\#################\\
//    \        ____       \
//     \_______\___\_______\
// An AC a day keeps the doctor away.

#pragma GCC optimize("Ofast")
#pragma loop_opt(on)
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define debug(x) 0//(cerr<<#x<<" = "<<(x)<<'\n')
#define all(v) begin(v),end(v)
#define siz(v) (ll(v.size()))
#define get_pos(v,x) (lower_bound(all(v),x)-begin(v))
#define pb emplace_back
#define ff first
#define ss second
#define mid (l+(r-l>>1))
#define rep(i,n) for(int i = 0; i < (n); i++)
#define REP(i,n) for(int i = 1; i <= (n); i++)

using namespace std;
using namespace __gnu_pbds;
typedef int64_t ll;
typedef uint64_t ull;
typedef long double ld;
typedef pair<ll,ll> pll;
template <typename T> using rkt = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
constexpr ld PI = acos(-1), eps = 1e-8;
constexpr ll N = 502525, INF = 1e18, MOD = 998244353, K = 2;
constexpr inline ll cdiv(ll x, ll m) { return (x+m-1)/m; } // ceiling divide, x/m for flooring divide
template <typename T> void M(T &x, ll m = MOD){x%=m; if(x<0) x+=m;}

ll n,v[N],k;
signed main(){
    ios_base::sync_with_stdio(0), cin.tie(0);
  	cin >> n >> k;
  	cout << cdiv(n,d*2-1) << '\n';
}


Compiler output:
a.cc: In function 'int main()':
a.cc:47:24: error: 'd' was not declared in this scope
   47 |         cout << cdiv(n,d*2-1) << '\n';
      |                        ^
Language: C++

#include <stdio.h>

int main(){
  int N,D,k;
  scanf("%d%d",&N,&D);
  k = 1 + 2 * D;
  if(D%k==0){
    printf("%d"D/k);
  }else{
    printf("%d",D/k + 1);
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: unable to find string literal operator 'operator""D' with 'const char [3]', 'long unsigned int' arguments
    8 |     printf("%d"D/k);
      |            ^~~~~
Language: Java

mport java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int D = sc.nextInt();
        sc.close();

        if ((N % (2*D+1)) != 0)
            System.out.println((N / (2*D+1))+1);
        else
            System.out.println((N / (2*D+1));
    }
}

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
mport java.util.*;
^
Main.java:14: error: ')' or ',' expected
            System.out.println((N / (2*D+1));
                                            ^
2 errors
Language: Java

import java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int D = sc.nextInt();

        if ((N % (2*D+1) != 0)
            System.out.println((N / (2*D+1))+1);
        else
            System.out.println((N / (2*D+1));
    }
}

Compiler output:
Main.java:10: error: ')' expected
        if ((N % (2*D+1) != 0)
                              ^
Main.java:13: error: ')' or ',' expected
            System.out.println((N / (2*D+1));
                                            ^
2 errors
Language: C

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


Compiler output:
main.c: In function 'main':
main.c:6:3: error: expected ',' or ';' before 'printf'
    6 |   printf("%d",ans);
      |   ^~~~~~
Language: C

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

Compiler output:
main.c: In function 'main':
main.c:6:3: error: expected ',' or ';' before 'printf'
    6 |   printf("%d",ans);
      |   ^~~~~~
Language: C++

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

int N, D;

int main() {
    cin >> N >> D;
    cout << N/(2D+1) + !!(N%(2D+1));
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: unable to find numeric literal operator 'operator""D'
    8 |     cout << N/(2D+1) + !!(N%(2D+1));
      |                ^~
a.cc:8:30: error: unable to find numeric literal operator 'operator""D'
    8 |     cout << N/(2D+1) + !!(N%(2D+1));
      |                              ^~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:8:28: error: invalid operands of types 'long long int' and 'const char [2]' to binary 'operator<<'
    8 |   cout << ceil(a / (1+2*b) << "\n";
      |                ~~~~~~~~~~~ ^~ ~~~~
      |                  |            |
      |                  |            const char [2]
      |                  long long int
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:8:28: error: invalid operands of types 'long long int' and 'const char [2]' to binary 'operator<<'
    8 |   cout << cell(a / (1+2*b) << "\n";
      |                ~~~~~~~~~~~ ^~ ~~~~
      |                  |            |
      |                  |            const char [2]
      |                  long long int
Language: C++

#include <iostream>
using namespace std;

int main(){
  long lomg int a,b,sum = 0,num = 0;
  cin >> a >> b;
  while(a > sum){
    sum = 1+2*b;
    num++;
  }
  cout << num << "\n";
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: error: expected initializer before 'int'
    5 |   long lomg int a,b,sum = 0,num = 0;
      |             ^~~
a.cc:6:10: error: 'a' was not declared in this scope
    6 |   cin >> a >> b;
      |          ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |   cin >> a >> b;
      |               ^
a.cc:7:13: error: 'sum' was not declared in this scope
    7 |   while(a > sum){
      |             ^~~
a.cc:9:5: error: 'num' was not declared in this scope; did you mean 'enum'?
    9 |     num++;
      |     ^~~
      |     enum
a.cc:11:11: error: 'num' was not declared in this scope; did you mean 'enum'?
   11 |   cout << num << "\n";
      |           ^~~
      |           enum
Language: Java

import java.util.*;
public class ABC134B{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);	
		
		int N=sc.nextInt();
		int D=sc.nextInt();
		
		int[] kns=new int[N];
		for(int i=0;i<N;i++){
			kns[i]=0;
		}
		int j=0;
		int sum=0;
		while(sum<N){
			sum+=1+2*D;
			j++;
		}
		System.out.println(j);
	}

}	


Compiler output:
Main.java:2: error: class ABC134B is public, should be declared in a file named ABC134B.java
public class ABC134B{
       ^
1 error
Language: C++

#include<iostream>

int main()
{
    int N,D,man,remainder;
    cin>>N;
    cin>>D;
    man = N / (2*D + 1);
    remainder=N%(2*D+1);
    if(!remainder)
        cout<<man<<endl;
    else
        cout<<man+1<<endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |     cin>>N;
      |     ^~~
      |     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:11:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 |         cout<<man<<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:11:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 |         cout<<man<<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)
      |     ^~~~
a.cc:13:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   13 |         cout<<man+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:13:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   13 |         cout<<man+1<<endl;
      |                      ^~~~
      |                      std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>
using namespace std;

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

	int sight = 1 + 2 * D;
	bool break_flg = false;

	for (int i = 1; i < N + 1; ++i) {
		int count = i;
		if (N <= sight * i) {
			break_flg = true;
		}

		if(break_flg) break;
	}

	cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:17: error: 'count' was not declared in this scope
   20 |         cout << count << endl;
      |                 ^~~~~
Language: C++


#include <vector>
#include <algorithm>

using namespace std;
typedef long long ll;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'scanf' was not declared in this scope
   10 |     scanf("%d%d",&n,&d);
      |     ^~~~~
a.cc:12:5: error: 'printf' was not declared in this scope
   12 |     printf("%d\n",ans);
      |     ^~~~~~
a.cc:4:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
    3 | #include <algorithm>
  +++ |+#include <cstdio>
    4 |
Language: C++

#include <iostream>
#include<math.h>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: lvalue required as left operand of assignment
   11 |     if(N%(2*D + 1) = 0)
      |        ~^~~~~~~~~~
Language: C

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);++i)
#define repone(i,n) for(int i=1;i<(int)(n);++i)

#define Rep(j,n) for(int j=0;j<(int)(n);++j)

#define int long long

using namespace std;

signed main()
{
int x=0,y=0,z=0,w=0,i=0,j=0,n=0,L=0,W=0;
std::cin >> x>>y;
string xyz ="";
std::cout  <<((x%(y*2+1)==0)?x/(y*2+1):x/(y*2+1)+1)<< '\n';

}


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>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void _main()
{
    int N, D;
    cin >> N >> D;
    const int 2D = D * 2;
    cout << (N + 2D - 1) / 2D << endl;
}


Compiler output:
a.cc: In function 'void _main()':
a.cc:17:15: error: expected unqualified-id before numeric constant
   17 |     const int 2D = D * 2;
      |               ^~
a.cc:18:18: error: unable to find numeric literal operator 'operator""D'
   18 |     cout << (N + 2D - 1) / 2D << endl;
      |                  ^~
a.cc:18:28: error: unable to find numeric literal operator 'operator""D'
   18 |     cout << (N + 2D - 1) / 2D << endl;
      |                            ^~
Language: C++

void goldenApple(){
    int n, d;
    cin >> n >> d;
    cout << (n / (2 * d + 1));
}

int main() {
    goldenApple();
}

Compiler output:
a.cc: In function 'void goldenApple()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> n >> d;
      |     ^~~
a.cc:4:5: error: 'cout' was not declared in this scope
    4 |     cout << (n / (2 * d + 1));
      |     ^~~~
Language: Java

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int d = sc.nextInt();
		
		int a = 0;
		
		do {
			a++;
            n--
		} while (a * 2 * d < n);
		
		System.out.println(a);
		
		sc.close();
		
	}

}

Compiler output:
Main.java:15: error: ';' expected
            n--
               ^
1 error
Language: Java

import java.util.Scanner;

public class abc134b {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int d = sc.nextInt();
		
		int a = 0;
		
		do {
			a++;
            n--;
		} while (a * 2 * d < n);
		
		System.out.println(a);
		
		sc.close();
		
	}

}

Compiler output:
Main.java:3: error: class abc134b is public, should be declared in a file named abc134b.java
public class abc134b {
       ^
1 error
Language: C++

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

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'nameespace'
    2 | using nameespace std;
      |       ^~~~~~~~~~
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |     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:18:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   18 |     cout << insp << 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:18:21: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   18 |     cout << insp << 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>
typedef long long ll;
#define mod 1000000007
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vll vector <ll>
#define vii vector <int>
#define vpii vector <pii>
#define vpll vector <pll>
#define ff first
#define ss second
#define matrix vector <vll>
#define all(v) v.begin(),v.end()
#define PQ priority_queue
using namespace std;
ll pow(ll a, ll b){
	ll res = 1;
	while(b > 0){
		if(b&1) res*=a;
		b/=2;
		a*=a;
	}
	return res;
}
int main()
{
	//ios::sync_with_stdio(0);
	//cin.tie(0);
	int n, d;
  	cin >> n >> d;
  	int cnt = 0;
  	int p = 0;
  	while(p < n){
    	p+=(2*d+1)
      	cnt++;
    }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:19: error: expected ';' before 'cnt'
   36 |         p+=(2*d+1)
      |                   ^
      |                   ;
   37 |         cnt++;
      |         ~~~
Language: C++

#include<bit/stdc++.h>
using namespace std;
 
int main(void){
  int N, D;
  cin >> N >> D;
  
  int x;
  int range = 2 * D + 1;
  x = (N-1)/range + 1;
  cout << x << endl;
  
  return 0;
}

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

#include<bit/stdc++>
using namespace std;

int main(void){
  int N, D;
  cin >> N >> D;
  
  int x;
  int range = 2 * D + 1;
  x = (N-1)/range + 1;
  cout << x << endl;
  
  return 0;
}
  

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

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:26: error: expected primary-expression before ')' token
    8 |         cout << (N/(2*D+!))+1 << endl;
      |                          ^
Language: C++

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

int main() {
    int n, d;
    cin >> n >> d;
    cout << (n/(2d+1)+0.99)/1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: unable to find numeric literal operator 'operator""d'
    7 |     cout << (n/(2d+1)+0.99)/1 << endl;
      |                 ^~
Language: C++

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

int main() {
    int n, d;
    cin >> n >> d;
    cout << (n/(2n+1)+0.99)/1 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: unable to find numeric literal operator 'operator""n'
    7 |     cout << (n/(2n+1)+0.99)/1 << endl;
      |                 ^~
Language: C++

#include<iostream>
#include<cmath>
#include<numeric>
#include<functional>
#include<string>
#include<algorithm>
#include<vector>
#include<map>
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<n;i++)
#define ll long long
#define modbig (10*10*10*10*10*10*10*10*10+7)
using namespace std;

int main(){
  int n; double d;
  cin>>n>>d;
  cout<<ceiling(n/(2*d+1));
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: 'ceiling' was not declared in this scope
   18 |   cout<<ceiling(n/(2*d+1));
      |         ^~~~~~~
Language: C++

#include <iostream>    

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:21: error: unable to find numeric literal operator 'operator""D'
    8 |       int ans = N / 2D;
      |                     ^~
a.cc:9:15: error: unable to find numeric literal operator 'operator""D'
    9 |       if (N % 2D != 0) {
      |               ^~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:4:8: error: 'cin' is not a member of 'std'
    4 |   std::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 | int main(void)
a.cc:6:17: error: unable to find numeric literal operator 'operator""D'
    6 |   int ans = N / 2D;
      |                 ^~
a.cc:7:11: error: unable to find numeric literal operator 'operator""D'
    7 |   if (N % 2D != 0) {
      |           ^~
a.cc:11:8: error: 'cout' is not a member of 'std'
   11 |   std::cout << ans << std::endl;
      |        ^~~~
a.cc:11:8: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:11:28: error: 'endl' is not a member of 'std'
   11 |   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(void)
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:15:12: error: expected '}' at end of input
   15 |   return 0;
      |            ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:15:12: error: expected '}' at end of input
   15 |   return 0;
      |            ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

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

Compiler output:
a.cc:6:2: error: extended character 　 is not valid in an identifier
    6 |  　if(n%(2*d+1)!=0)cout<<(n/2*d+1)+1<<endl;
      |  ^
a.cc: In function 'int main()':
a.cc:6:2: error: '\U00003000if' was not declared in this scope
    6 |  　if(n%(2*d+1)!=0)cout<<(n/2*d+1)+1<<endl;
      |  ^~~~
a.cc:7:3: error: 'else' without a previous 'if'
    7 |   else cout<<n/2*d+1<<endl;
      |   ^~~~
Language: C++

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

Compiler output:
a.cc:6:2: error: extended character 　 is not valid in an identifier
    6 |  　if(n%2*d+1!=0)cout<<(n/2*d+1)+1<<endl;
      |  ^
a.cc: In function 'int main()':
a.cc:6:2: error: '\U00003000if' was not declared in this scope
    6 |  　if(n%2*d+1!=0)cout<<(n/2*d+1)+1<<endl;
      |  ^~~~
a.cc:7:3: error: 'else' without a previous 'if'
    7 |   else cout<<n/2*d+1<<endl;
      |   ^~~~
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();
		int D = sc.nextInt();
		int A = N - D;
		int ans;
		
		for(int i = 0; i > A; i ++ ){
		
		ans = (i+1)/2;
		
		}

		System.out.print(ans);
	
	}
}


Compiler output:
Main.java:17: error: variable ans might not have been initialized
		System.out.print(ans);
		                 ^
1 error
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();
		int D = sc.nextInt();
		int A = N - D;
		int ans;
		
		for(int i = 0; i > A; i ++ ){
		
		ans = i;
		
		}

		System.out.print(ans/2);
	
	}
}


Compiler output:
Main.java:17: error: variable ans might not have been initialized
		System.out.print(ans/2);
		                 ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef unsigned long long ULL;
#define rep(i,j,k) for(int i=j;i<k;i++)
#define BIG_NUM 2000000000
#define MOD 1000000007
#define EPS 0.000000001
int main(){
  int a,b;
  cin >> a >> b;
  cout << (a %(2*d+1) > 0 ? (a/(2*d+1) + 1):a/(2*d+1));
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:18: error: 'd' was not declared in this scope
   12 |   cout << (a %(2*d+1) > 0 ? (a/(2*d+1) + 1):a/(2*d+1));
      |                  ^
Language: C++

//AtCoderのテンプレートファイル、コンソール入出力だけで大丈夫
#include<iostream>
using namespace std;
int main() {
	int N,D;
	cin >> N >> D;
 
  int ans,x1,x2;
  x1=-D+sqrt(N+D*D);
  x2=-D-sqrt(N+D*D);
  x1<x2?ans=x1:ans=x2;
	cout << ans << endl;
	//return 0;
};

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'sqrt' was not declared in this scope
    9 |   x1=-D+sqrt(N+D*D);
      |         ^~~~
Language: C++

//AtCoderのテンプレートファイル、コンソール入出力だけで大丈夫
#include<iostream>
using namespace std;
int main() {
	int N,D;
	cin >> N >> D;
 
  int ans,x1,x2;
  x1=-D+sqrt(N+pow(D,2));
  x2=-D-sqrt(N+pow(D,2));
  x1<x2?ans=x1:ans=x2;
	cout << ans << endl;
	//return 0;
};

Compiler output:
a.cc: In function 'int main()':
a.cc:9:16: error: 'pow' was not declared in this scope
    9 |   x1=-D+sqrt(N+pow(D,2));
      |                ^~~
a.cc:9:9: error: 'sqrt' was not declared in this scope
    9 |   x1=-D+sqrt(N+pow(D,2));
      |         ^~~~
Language: C++

//AtCoderのテンプレートファイル、コンソール入出力だけで大丈夫
#include<iostream>
using namespace std;
int main() {
	int N,D;
	cin >> N;
  	cin >> D;

  int ans,x1,x2;
  x1=-D+sqrt(N+pow(D,2));
  x2=-D-sqrt(N+pow(D,2));
  x1<x2?ans=x1:ans=x2;
	cout << x << endl;
	//return 0;
};

Compiler output:
a.cc: In function 'int main()':
a.cc:10:16: error: 'pow' was not declared in this scope
   10 |   x1=-D+sqrt(N+pow(D,2));
      |                ^~~
a.cc:10:9: error: 'sqrt' was not declared in this scope
   10 |   x1=-D+sqrt(N+pow(D,2));
      |         ^~~~
a.cc:13:17: error: 'x' was not declared in this scope; did you mean 'x2'?
   13 |         cout << x << endl;
      |                 ^
      |                 x2
Language: C++

#include <cstdio>
#include <cstdlib>
using namespace std;
int n,d;
int main ()
{
	scanf("%d%d",&n,&d);
	printf("%d",(n/(2*(d+1)));
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:34: error: expected ')' before ';' token
    8 |         printf("%d",(n/(2*(d+1)));
      |               ~                  ^
      |                                  )
Language: Java

import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String point = sc.nextLine();

        String[] points = point.split(" ");
        int n = Integer.parseInt(points[0]);
        int d = Integer.parseInt(points[1]);

        int d2 = d * 2.0 + 1;

        //きりあげ
        double kiriage = Math.ceil(n / d2);

        System.out.println((int)kiriage);
    }
}

Compiler output:
Main.java:12: error: incompatible types: possible lossy conversion from double to int
        int d2 = d * 2.0 + 1;
                         ^
1 error
Language: Java

public class Main {
 
    public static void main(String[] args) throws Exception {
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        int maxOrMin = Integer.parseInt(scn.nextLine());
 
        int hatena = 0;
        int x = 0;
        int y = 0;
 
        for (int i = 0; i < str.length(); i++) {
            switch(str.charAt(i)) {
            case 'L':
                x -= 1;
                break;
 
            case 'R':
                x += 1;
                break;
 
            case 'U':
                y -= 1;
                break;
 
            case 'D':
                y += 1;
                break;
            case '?':
                hatena += 1;
                break;
            }
 
        }
 
        int ans = Math.abs(x) + Math.abs(y);
        if(maxOrMin == 1){
            ans += hatena;
        }else if((ans - hatena) > 0){
            ans -= hatena;
        }else {
            if((hatena + ans) % 2 == 0) ans = 0;
            else ans = 1;
        }
 
        System.out.println(ans);
    }
}

Compiler output:
Main.java:4: error: cannot find symbol
        Scanner scn = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
        Scanner scn = new Scanner(System.in);
                          ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: Java

import java.util.*;
 
class Main
{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while (in.hasNextLine()) {
			String line = in.nextLine();
			lines.add(line);
		}
		int intN = Integer.parseInt(lines.get(0));
		int intD = Integer.parseInt(lines.get(1));
		
        System.out.println(intN / (intD*2+1));
    }
}

Compiler output:
Main.java:7: error: cannot find symbol
        while (in.hasNextLine()) {
               ^
  symbol:   variable in
  location: class Main
Main.java:8: error: cannot find symbol
			String line = in.nextLine();
			              ^
  symbol:   variable in
  location: class Main
Main.java:9: error: cannot find symbol
			lines.add(line);
			^
  symbol:   variable lines
  location: class Main
Main.java:11: error: cannot find symbol
		int intN = Integer.parseInt(lines.get(0));
		                            ^
  symbol:   variable lines
  location: class Main
Main.java:12: error: cannot find symbol
		int intD = Integer.parseInt(lines.get(1));
		                            ^
  symbol:   variable lines
  location: class Main
5 errors
Language: C++

#include<iostream>

using namespace std;

int main(){
	long long N,D;
  	cin>>N>>D;
  	cout<<N/(2D+1)+1<<endl;
  	return 0;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: unable to find numeric literal operator 'operator""D'
    8 |         cout<<N/(2D+1)+1<<endl;
      |                  ^~
Language: C++

#include<stdio.h>

int main() 

{

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

	int a=d*2+1;

	double ans=(double)n / (double)a ;

	int b =ceil(ans);

	printf("%d\n",b);

	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:16: error: 'ceil' was not declared in this scope
   13 |         int b =ceil(ans);
      |                ^~~~
Language: C

#include <stdio.h>

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


Compiler output:
main.c: In function 'main':
main.c:7:10: error: expected ';' before 'printf'
    7 |   b=2*D+1
      |          ^
      |          ;
    8 |   printf("%d",(N+b-1)/b);
      |   ~~~~~~
Language: C++

//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

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

    cout << people << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:77:5: error: expected ',' or ';' before 'cout'
   77 |     cout << people << endl;
      |     ^~~~
Language: C

#inclide <stdio.h>
int main()
{
  int n,d;
  scanf("%d%d",&n,&d);
  printf("%d",((n-2-2*d)/(1+2*d))+3);
}

Compiler output:
main.c:1:2: error: invalid preprocessing directive #inclide; did you mean #include?
    1 | #inclide <stdio.h>
      |  ^~~~~~~
      |  include
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf("%d%d",&n,&d);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #inclide <stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf("%d%d",&n,&d);
      |   ^~~~~
main.c:5:3: 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-2-2*d)/(1+2*d))+3);
      |   ^~~~~~
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'
Language: C

#inclide <stdio.h>
int main()
{
  int n,d;
  scanf("%d%d",n,d);
  printf("%d",((n-2-2*d)/(1+2*d))+3);
}

Compiler output:
main.c:1:2: error: invalid preprocessing directive #inclide; did you mean #include?
    1 | #inclide <stdio.h>
      |  ^~~~~~~
      |  include
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf("%d%d",n,d);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #inclide <stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf("%d%d",n,d);
      |   ^~~~~
main.c:5:3: 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-2-2*d)/(1+2*d))+3);
      |   ^~~~~~
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'
Language: C

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

Compiler output:
main.c: In function 'main':
main.c:7:31: error: expected ';' before ')' token
    7 |     printf("%d\n",n/((d*2)+1)));
      |                               ^
      |                               ;
main.c:7:31: error: expected statement before ')' token
Language: C

#nclude<stdio.h>
 
int main(void)
{
    int n,d;
    scanf("%d%d",&n ,&d);
    printf("%d\n",n/(d*2));
	return 0; 
}

Compiler output:
main.c:1:2: error: invalid preprocessing directive #nclude; did you mean #include?
    1 | #nclude<stdio.h>
      |  ^~~~~~
      |  include
main.c: In function 'main':
main.c:6:5: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    6 |     scanf("%d%d",&n ,&d);
      |     ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #nclude<stdio.h>
main.c:6:5: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    6 |     scanf("%d%d",&n ,&d);
      |     ^~~~~
main.c:6:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:7:5: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    7 |     printf("%d\n",n/(d*2));
      |     ^~~~~~
main.c:7:5: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:5: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:7:5: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C++

#include <bits/stdc++.h>

using namespace std;

int ans(int n, int d)
{
     return (n + 2*d) / ( 2*d +1 );
}

int main(void)
{
  int n,d;
  
  cin >> n >> d;
  
  count << ans(n,d) << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:9: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator<<'
   16 |   count << ans(n,d) << endl;
      |   ~~~~~~^~~~~~~~~~~
Language: Java

package com.example.mytimer;

import java.util.Scanner;

public class ABC {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int D = scanner.nextInt();

        int range = 2*D+1;
        int result;
        if (N%range == 0){
            result = N / range;
        }else{
            result = N / range + 1;
        }

        System.out.println(result);
    }
}


Compiler output:
Main.java:5: error: class ABC is public, should be declared in a file named ABC.java
public class ABC {
       ^
1 error
Language: C++

#include<bits/stdc++.h>
int main()
{
int N,D,a,s;
  cin>>N>>D;
  s=2*D+1;
  a=N/s;
  if(N%s>1)
    a++;
  cout<<a<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin>>N>>D;
      |   ^~~
      |   std::cin
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:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:10:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |   cout<<a<<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:10:12: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |   cout<<a<<endl;
      |            ^~~~
      |            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)
      |     ^~~~
Language: C++


#include <iostream>

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

	int num = (int)std::ceil((double)n / (2 * d));
    std::cout << num;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:29: error: 'ceil' is not a member of 'std'
    9 |         int num = (int)std::ceil((double)n / (2 * d));
      |                             ^~~~
Language: C

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

Compiler output:
main.c: In function 'main':
main.c:8:9: error: invalid operands to binary % (have 'double' and 'int')
    8 |   if(ans%1!=0){
      |         ^
Language: C

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

Compiler output:
main.c: In function 'main':
main.c:8:9: error: invalid operands to binary % (have 'double' and 'int')
    8 |   if(ans%1!=0){
      |         ^
Language: C++

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

int main() {
  int n,d;
  cin >> n >> d;
  
  int ans =0;
  
  for (int i=0; i<n;;){
    i = i+d+1;
    ans++;
    i += d;
  }
  
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:21: error: expected primary-expression before ';' token
   10 |   for (int i=0; i<n;;){
      |                     ^
a.cc:10:21: error: expected ')' before ';' token
   10 |   for (int i=0; i<n;;){
      |       ~             ^
      |                     )
a.cc:10:22: error: expected primary-expression before ')' token
   10 |   for (int i=0; i<n;;){
      |                      ^
Language: C++

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

int main() {
  int n,d;
  cin >> n >> d;
  
  int ans =0;
  
  for (int i=0; i<n; ; ){
    i = i+d+1;
    ans++;
    i += d;
  }
  
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:22: error: expected primary-expression before ';' token
   10 |   for (int i=0; i<n; ; ){
      |                      ^
a.cc:10:21: error: expected ')' before ';' token
   10 |   for (int i=0; i<n; ; ){
      |       ~             ^~
      |                     )
a.cc:10:24: error: expected primary-expression before ')' token
   10 |   for (int i=0; i<n; ; ){
      |                        ^
Language: C

#include<stdio.h>

int main(){
  int N,D,can=0;
  int ans=1;
  scanf("%d %d",&N,&D);
  while(N>can){
    can=(D*2+1)*ans
    ans++;
  }
  printf("%d",ans-1);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:20: error: expected ';' before 'ans'
    8 |     can=(D*2+1)*ans
      |                    ^
      |                    ;
    9 |     ans++;
      |     ~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:12:11: error: 'i' was not declared in this scope
   12 |   cout >> i >> endl;
      |           ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:10:8: error: expected ';' before ':' token
   10 |     i++:
      |        ^
      |        ;
a.cc:12:11: error: 'i' was not declared in this scope
   12 |   cout >> i >> endl;
      |           ^