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

#include <bits/stdc++.h>
using ll = long long;
using namespace std;
#define rep(i, n) for (int i = 0; i < n; i++)
#define reprev(i, n) for (int i = n - 1; i >= 0; i--)

int main(){
  double R, answer;
  cin >> R;
  answer = 2 * R * 3.141;
  cout << answer << 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<cstdio>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<map> 
using namespace std;
typedef long long ll;
const double pi=acos(-1.0);


int main()
{
	double a;
	scanf("%lf",&a);
	printf("%.20f",a*2*pi);
	
}



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

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

signed main()
{
	int r;
	cin>>r;
	double ans=1.0*r*2*3.14159265358979323846;
	
	cout<<fixed<<setprecision(20)<<ans<< endl;
	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 <stdio.h>
using namespace std;

int main(){
  int R; cin >> R;
  double en;
  en = 2.00 * 3.1415 * R;
  cout << en << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:10: error: 'cin' was not declared in this scope
    5 |   int R; cin >> R;
      |          ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:8:3: error: 'cout' was not declared in this scope
    8 |   cout << en << endl;
      |   ^~~~
a.cc:8:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:8:17: error: 'endl' was not declared in this scope
    8 |   cout << en << endl;
      |                 ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include <stdio.h>
  +++ |+#include <ostream>
    2 | using namespace std;
Language: C

//g++ -std=gnu++14 a.cpp
//#include <bits/stdc++.h>

//#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <iostream>
#include <istream>
#include <iterator>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
#include <tuple>
#include <iomanip>
#include <random>
#include <math.h>


using namespace std;

#define ll long long
#define rep(i, n) for(ll i = 0; i < (n); i++)
ll MOD = 1e9 + 7;
int INF = 1 << 30;
ll INFL = 1LL << 60;

int main(){
  int N,M;
  cin >> N >> M;
  vector<int> h(M);
  rep(i,M) cin >> h.at(i);
  int sum = 0;
  rep(i,M){
    sum += h[i];
  }
  if(sum <= N){
    cout << N-sum << endl;
  }else{
    cout << -1 << endl;
  }
}


Compiler output:
main.c:5:10: fatal error: bitset: No such file or directory
    5 | #include <bitset>
      |          ^~~~~~~~
compilation terminated.
Language: C

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

int main(){
    double n;
    cin >> n;
    cout << 2 * n * M_PI << setprecision(10) << 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<iostream>
using namespace std;
int main(){
	double r;
	cin >> r;
	double ans = r *2.0000000* 3.1415926;
	cout << ans << endl;
}

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

#include <iostream>
using namespace std;

int main(){
	double pi = 3.141592;
	int n;
	cin >> n;

	cout << 2 * pi*n << endl;
}


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

///بِسْمِ الّٰلهِ الرَّحْمٰنِ الرَحِيْمِ7
#include<bits/stdc++.h>
#define ll long long
#define pi acos(-1.0)
int main()
{

    float r;
     scanf("%f",&r);
     float sd=2*pi*r;
     printf("%.5f",sd);
     return EXIT_SUCCESS;
}



Compiler output:
main.c:2:9: fatal error: bits/stdc++.h: No such file or directory
    2 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pp pair<int,int>
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define ld long double
#define al(a) (a).begin(),(a).end()
#define mk make_pair
#define check cout<<"?"<<endl;

ll MOD=1000000007;
ll mod=998244353;
int inf=1000001000;
ll INF=1e18+5;

int main() {
    cout<<fixed<<
    int r; cin>>r;
    cout<<3.14159*2*r<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:5: error: expected primary-expression before 'int'
   19 |     int r; cin>>r;
      |     ^~~
a.cc:19:17: error: 'r' was not declared in this scope
   19 |     int r; cin>>r;
      |                 ^
Language: C

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;
 
int main(){
    double n;
    const double PI = (acos(-1));
    cin >> n;
    cout << fixed << setprecision(10) << 2*n*PI << endl;
    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 <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int, int>;

int main() {
  int r;
  cin >> r;
  
  cout << fixed << setprecision(10) << 3.141592 * r * 2 << 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 R;
  cin >> R;
  cout << 6,28 * R << 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;

typedef long long ll;
typedef pair<int, int> pii;

const int N = 1e5 + 11;
const int M = 1e6 + 11;
const int MOD = 1e9 + 7;
const double PI = acos(-1.0);

int main(int argc, char **args){
    freopen("in.txt", "r", stdin);
    double r; cin >>r;
    cout << 2 * PI * r<<"\n";
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 <bits/stdc++.h>
using namespace std;

int main(){
    double R;
    cin >> R;
    cout << 2.0*R*M_PI << 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(void){
double R;
  double PI = 3.14159265;
cin >> R;
cout << PI * R * 2:
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: expected ';' before ':' token
    8 | cout << PI * R * 2:
      |                   ^
      |                   ;
Language: C

#include<bits/stdc++.h>

using namespace std;

void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define ANTHRO(x...) cerr << "[" << #x << "] = [", _print(x)
#else
#define ANTHRO(x...)
#endif


#define ll long long
#define MOD 1000000007
#define INF (ll)1e18
#define EPS 1e-9
/*
	XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    No, nothing good starts in a getaway car
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
*/

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    long double pi=3.1416;
    long double r; cin>>r;
    cout<<setprecision(5)<<(long double)(2*pi*r)<<endl;
    return 0;
}


Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: Java

public class Main {
	public static void main(String[] args) {
		
			
		Scanner sc = new Scanner(System.in);
		int r = sc.nextInt();
		
		System.out.println(r*Math.PI);
	}

}

Compiler output:
Main.java:5: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		                 ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C

#include <bits/stdc++.h>
using namespace std;
#define PI 3.14159265359
using ll = long long;

int main(){
    int r;
    double ans;
    cin >> r;
    ans = 2 * r * PI;
    cout << ans << 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 <iostream>
#define pi= 3.14159265359
using namespace std;
int main()
{
	int r;
    cin >> r;
    double c = 2*pi*r;
    cout << c << endl;
}

Compiler output:
a.cc:2:9: warning: ISO C++11 requires whitespace after the macro name
    2 | #define pi= 3.14159265359
      |         ^~
a.cc: In function 'int main()':
a.cc:2:11: error: expected primary-expression before '=' token
    2 | #define pi= 3.14159265359
      |           ^
a.cc:8:18: note: in expansion of macro 'pi'
    8 |     double c = 2*pi*r;
      |                  ^~
Language: Java

import java.util.Scanner;

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

    int r = sc.nextInt();
    System.out.println(2 * r * 3.14159265);
  }
}


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

import java.util.*;
public class Main{
  public static void main(String[] args){
    Scannner sc = new Scanner(System.in);
    int r = sc.nextInt();
    System.out.println(2*Math.PI*r);
  }
}

Compiler output:
Main.java:4: error: cannot find symbol
    Scannner sc = new Scanner(System.in);
    ^
  symbol:   class Scannner
  location: class Main
1 error
Language: C

#include<iostream>
#include<stdio.h>
#include<string>
#include<cmath>
#include<math.h>
#include<vector>
#include<algorithm>
#include<map>
#pragma warning(disable: 4996)
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
using ll = long long;


int main() {
	const double PI = 3.14159265358979323846;
	double R,a;
	cin >> R;

	a = R*2 * PI;

	cout << a << endl;

	return 0;
}

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

	#include<bits/stdc++.h>
	using namespace std;
	#define fo(i,n) for(int i=0;i<n;i++)
	#define pb push_back
	#define mp map<int,int>
	#define ump unordered_map<int,int>
	#define vi vector<int>
	#define M INT_MAX
	#define MI INT_MIN
	#define ll long long int
	#define pii pair<int,int>
	#define F first
	#define S second
	#define fall(i,a,b) for(int i=a;i<b;i++)
	#define pi 3.1415926535
	void solve()
	{
			int r;
			cin>>r;
			cout<<(2*pi*r)<<endl;
	}
	int main()
	{
		ios_base::sync_with_stdio(false);
	    cin.tie(NULL);
		solve();
	}

Compiler output:
main.c:1:17: fatal error: bits/stdc++.h: No such file or directory
    1 |         #include<bits/stdc++.h>
      |                 ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

import math
print(math.pi*input()*2)

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'print'
    2 | print(math.pi*input()*2)
      | ^~~~~
Language: C++

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

int main () {
  double N;
  cin >> N;
  cout << fixed << setpresicion(5);
  cout << 2*N*3.14159 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: 'setpresicion' was not declared in this scope
    7 |   cout << fixed << setpresicion(5);
      |                    ^~~~~~~~~~~~
Language: C

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

int main(){
  int a,b;
  cin >> a;
  cout << a*2*3.14159265358979323846 << 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

#define _USE_MATH_DEFINES
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>

typedef long long ll;

using namespace std;



int main() {
    double r;
    cin >> r;

    cout << r * 2 * M_PI;
   

    return 0;
}

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

#include<iostream>
#define rep(i,a) for(int i=0;i<a;i++)
using namespace std;
using ll = long long;
int main(void){
    int r;
    cin>>r;
    cout<<2*r*3.1415<<endl;
}


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

import math
def round(x):
    return 2* math.pi * x
R = int(input())
ans = round(R)
print(ans)


Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'def'
    2 | def round(x):
      | ^~~
main.c:2:1: error: unknown type name 'def'
Language: C

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define loop(n)      for(int i=0;i<(n);i++)
#define lp(x,s,e)    for(int x=(s);x<(e);x++)
#define lpe(x,s,e)    for(int x=(s);x<=(e);x++)
#define endl '\n'
using namespace std;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
   double n;
   cin>>n;
   double pi=6.28318530717958623200;
   double ans =pi*n;
   cout<<fixed<<setprecision(20)<<ans;
}



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;
using Graph = vector<vector<int>>;
#define ll long long
#define _GLIBCXX_DEBUG
const ll MOD = 1000000007;
const int MAX = 510000;

int main() {
  double R;
  cin >> R;
  double pi = 3.14159265358979;
  cout << setprecision(20) << fixed;
  cout << 2*pi*R << 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 <iostream>
#define PI 3.141592
using namespace std;

int main(){
  int n = 0;
  cin >> n;
  cout << 2*n*PI << endl;
}

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

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define mp make_pair
#define pb push_back
#define pll pair<ll,ll>


int main()

{
	long double r;
	cin>>r;
	long double k = 3.141592653589;
	k = 2*r*k;
	cout<<k<<endl;
	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<bits/stdc++.h>

using namespace std;

double pi=acos(-1);

int main()
{
    double R;
    cin >> R;
    cout << fixed << setprecision(2) << 2.0*pi*R << endl;
    return 0;
}


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

R = int(input())

print(R * (3.1415*2))

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | R = int(input())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'R' [-Wimplicit-int]
main.c:1:5: error: expected expression before 'int'
    1 | R = int(input())
      |     ^~~
Language: C

R = float(input())

print(float(2*3.1415926535*R))


Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | R = float(input())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'R' [-Wimplicit-int]
main.c:1:5: error: expected expression before 'float'
    1 | R = float(input())
      |     ^~~~~
Language: C

#include <bits/stdc++.h>
#define rep(i,a,b) for(int i=a; i< (int)(b); ++i)
#define ALL(x) (x).begin(),(x).end()
#define rALL(x) (x).rbegin(),(x).rend()
typedef long double ld;
using ll=long long;
using namespace std;
const auto mod=1e9+7;
const ld pi = (acos(-1));


int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(20);
  
  ld r; cin >> r;
  cout << 2*r*pi << 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>

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

int main( void )
{
	ll r;

	cin >> r;

	cout << (2 * r *3.1415926535) << endl;

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

int main(){
	int R;
    cin >> R;

    cout << R*M_PI << 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

///mAAria...
#include<bits/stdc++.h>
 
using namespace std;
 
#define int long long
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define ld long double
#define ff first
#define ss second
#define pb push_back
#define pii pair<int,int>
#define pi 3.1415926535897932384626433832
#define mod 1000000000
//#define mod 998244353
#define inf 1000000000
#define pr1(a) cout << a << "\n"
#define pr2(a,b)cout << a <<  " " <<b<< "\n"
#define pr3(a,b,c) cout << a <<" " << b << " " << c << "\n"

const long double PI = acos(-1);

int powm(int a, int b) {
    int res=1;
    while(b) {
        if(b&1)
            res=(res*a)%mod;
        a=(a*a)%mod;
        b>>=1;
    }
    return res;
}

int gcd(int a, int b){
    if(b==0)return a;
    return gcd(b,a%b);
}
const int maxn = 2*1e5 + 10;


void solve(){
    int r;
    cin >> r;

    double ans = 2.0*pi*(double)r;

    cout << fixed << setprecision(20) << ans << endl;
    

} 

signed main() 
{   
    IOS;
    int t = 1;
    // cin >> t;

    for(int i = 1;i<=t;i++){
        solve();
    }
    return 0;
} 

 

Compiler output:
main.c:2:9: fatal error: bits/stdc++.h: No such file or directory
    2 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C



import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) {
        FastReader s = new FastReader();
        int T = s.nextInt();
        double pi = 2 * Math.acos(0.0);
        System.out.println(2*pi*T);
    }

    private static boolean isPrime(int n) {
        if (n == 2)
            return true;
        else if ((n % 2 == 0 && n > 2) || n < 2)
            return false;
        else {
            for (int i = 3; i <= (int) Math.sqrt(n); i += 2) {
                if (n % i == 0)
                    return false;
            }
            return true;
        }


    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }

}

Compiler output:
main.c:3:1: error: unknown type name 'import'
    3 | import java.io.BufferedReader;
      | ^~~~~~
main.c:3:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    3 | import java.io.BufferedReader;
      |            ^
main.c:4:1: error: unknown type name 'import'
    4 | import java.io.IOException;
      | ^~~~~~
main.c:4:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    4 | import java.io.IOException;
      |            ^
main.c:5:1: error: unknown type name 'import'
    5 | import java.io.InputStreamReader;
      | ^~~~~~
main.c:5:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    5 | import java.io.InputStreamReader;
      |            ^
main.c:6:1: error: unknown type name 'import'
    6 | import java.util.StringTokenizer;
      | ^~~~~~
main.c:6:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    6 | import java.util.StringTokenizer;
      |            ^
main.c:8:1: error: unknown type name 'public'
    8 | public class Main {
      | ^~~~~~
main.c:8:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    8 | public class Main {
      |              ^~~~
Language: C

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

int main(){
	int r;
	scanf("%d", &r)
	double n=2*r*M_PI;
	printf("%lf", n);
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:24: error: expected ';' before 'double'
    6 |         scanf("%d", &r)
      |                        ^
      |                        ;
    7 |         double n=2*r*M_PI;
      |         ~~~~~~          
main.c:8:23: error: 'n' undeclared (first use in this function)
    8 |         printf("%lf", n);
      |                       ^
main.c:8:23: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include "bits/stdc++.h"
using namespace std;
#define pb push_back
#define fi first
#define se second
#define all(container) container.begin(),container.end()
#define fast ios::sync_with_stdio(0); cin.tie(0)
#ifndef ONLINE_JUDGE
#include "debug.cpp"
#endif
#define int long long
const int mod = 1e9+7;  
int power(int a,int b) { if(b==0) return 1; int res = power(a,b/2); if(b&1) return res * res * a; else return res * res; }


int32_t main(){
    
  fast;
  long double r; cin >> r;
  long double pi = 3.1415926535;
  long double ans = 2*pi*r;
  cout << fixed << set_precision(12) << ans << '\n';

  

  return 0;
}

Compiler output:
a.cc:9:10: fatal error: debug.cpp: No such file or directory
    9 | #include "debug.cpp"
      |          ^~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>
using namespace std;
double pi = 3.14159
int main(void){
  double r;
  cin >> r;
  cout << setprecision(20) <<  2*r*pi;
  cout << 
  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<stdio.h>
//#pragma GCC optimize("Ofast","no-stack-protector","unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx")
//#include<bits/extc++.h>
//using namespace __gnu_pbds;
using namespace std;
#define F(i,L,R) for(int i=L;i<R;++i)
#define FE(i,L,R) for(int i=L;i<=R;++i)
#define getI(a) scanf("%lf", &a)
#define getII(a,b) scanf("%d%d", &a, &b)
#define getIII(a,b,c) scanf("%d%d%d", &a, &b, &c)
#define VgetI(n) int (n); scanf("%d",&(n))
#define VgetII(n,m) int (n),(m); scanf("%d %d",&(n),&(m))
#define VgetIII(n,m,k) int (n),(m),(k); scanf("%d %d %d",&(n),&(m),&(k))
#define debug(x) cout<<(#x)<<"="<<x<<"\n";
#define qq cout<<"QQ\n";
#define pb push_back
#define pii pair<int,int>
#define mp make_pair
#define f first
#define s second
#define ll long long
#define INF 2000000000
#define pi 3.14159265359
int main(){
	double r;
	while(~getI(r)){
		printf("%.6lf\n",pi*2*r);
	}
}


Compiler output:
main.c:6:1: error: unknown type name 'using'
    6 | using namespace std;
      | ^~~~~
main.c:6:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    6 | using namespace std;
      |                 ^~~
Language: C

#include "bits/stdc++.h"
using namespace std;
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
  enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (auto it = d.b; it != d.e; ++it)
    *this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

using ll = long long;

const int INF = 1e9 + 5;

int main()
 {
	int t;
	cin >> t;
	cout<<2*3.14*t;
	
	
}


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 <stdio.h>

int main(){
    double pi = 3.1415;
    double r;
    std::cin >> r;
    
    double ans;
    ans = 2 * pi * r;

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

Compiler output:
main.c: In function 'main':
main.c:6:5: error: 'std' undeclared (first use in this function); did you mean 'stdin'?
    6 |     std::cin >> r;
      |     ^~~
      |     stdin
main.c:6:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:8: error: expected ';' before '::' token
    6 |     std::cin >> r;
      |        ^~
      |        ;
main.c:11:8: error: expected ';' before '::' token
   11 |     std::cout << ans << std::endl;
      |        ^~
      |        ;
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
int x;
double pi=3.14159;
cin>>x;
cout<<(double)x*pi*2;
return 0;
}

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

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
#define rep(i,n) for(int i=0;i<(n);++i)
#define dunk(a) cout << (a) << endl
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using namespace std;
typedef long long ll;

int main() {
	int r; cin >> r;
	double ans = 2 * r * 3.14159;
	cout << ans << fixed << setprecision(10);
	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 <bits/stdc++.h>
 
using namespace std;
typedef long long int lli;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
typedef pair <lli,lli> pii;
#define ff first
#define ss second
#define mod 1000000007
#define pb push_back
#define EPS 1e-6

int main()
{
    fast;
    double r;
    cin>>r;
    cout<<fixed<<setprecision(20)<<(2*(M_PI)*r);
    
    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 <bits/stdc++.h>
using namespace std;

int main(){

int r;
    cin>>r;
    cout <<r*3.1415<<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()
{
	float n,sum;
	cin>>n;
	sum=n*2*3.14;
	cout<<sum<<endl;
	return 0;
}

Compiler output:
main.c:1:9: 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;

#define ld			long double
#define int         long long
#define pb          push_back
#define pii         pair<int,int>
#define vi          vector<int>
#define vii         vector<pii>
#define mi          map<int,int>
#define mii         map<pii,int>
#define all(a)      (a).begin(),(a).end()
#define x           first
#define y           second
#define sz(x)       (int)x.size()
#define endl        '\n'
#define MOD         100000000
#define sd(t) 		scanf("%d",&(t))
#define rep(i,a,b)  for(int i=a;i<b;i++)
#define hii 		cout << "hii" << endl
#define okay 		cout << "okay" << endl
#define hey 		cout << "hey" << endl
#define M_PIl       3.141592653589793238462643383279502884L 

template <class T> ostream& operator << (ostream &os, const vector<T> &v) { for (T i : v) os << i << ' '; return os; }
template <class T> ostream& operator << (ostream &os, const set<T> &v) { for (T i : v) os << i << ' '; return os; }
template <class T, class S> ostream& operator << (ostream &os, const pair<T, S> &v) { os << v.first << ' ' << v.second; return os; }
template <class T, class S> ostream& operator << (ostream &os, const unordered_map<T, S> &v) { for (auto i : v) os << '(' << i.first << "=>" << i.second << ')' << ' '; return os; } 
 
 
#ifndef ONLINE_JUDGE
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
    template <class Arg1> void __f(const char* name, Arg1&& arg1) { cerr << name << " : " << arg1 << endl; }
    template <class Arg1, class... Args>
    void __f(const char* names, Arg1&& arg1, Args&&... args) {
        const char* sep = strchr(names + 1, ',');
        cerr.write(names, sep - names) << " : " << arg1 << "  ";
        __f(sep + 1, args...);
    }
#else
#define trace(...) 
#pragma GCC optimize ("O3")
#pragma GCC optimiz1e ("unroll-loops")
#pragma GCC target("avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define _CRT_SECURE_NO_WARNINGS
#endif // ifndef ONLINE_JUDGE

void fast()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
const int mod = 1e9+7;
const int N = 1e5+5;
int arr[N];

void solve()
{	
	int r;
	cin >> r;
	ld ans = 2*(M_PI)*r;

	cout << fixed << setprecision(16) << ans << endl;
}				

int32_t main(){
	fast();
    int t = 1;
    // cin>> t;
    for(int i=1; i<=t; i++){
    	// cout << "Case #" << i << ": ";
    	solve();
    }
}




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 R;
        cin >> R;

        double ans = 2* M_PI * R;
        printf("%.12lf\n", ans);

}


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 pi 3.14159265358979323846


int main(){
  ios_base::sync_with_stdio(false);
  int n;
  cin>>n;
  double ans = 2*pi*n;
  cout<<setprecision(15);
  cout<<fixed;
  cout<<ans<<endl;
  

}

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

#include <iostream.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define PI 3.14159265359
using namespace std;
using ll = long long;
using P = pair<int,string>;

int main(){
    double r; cin >> r;
    cout << 2*PI*r << "\n";
}

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

#include <bits/stdc++.h>
using namespace std;
int main(void){
    // Your code here!
    double a;
    
    cin >> a;
    
    cout << a*2 * 3.14 << 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<iostream>

using namespace std;

int main()
{
	int R; cin >> R;

	cout << 2 * R * 3.14159265358979 << endl;
}

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<iostream>
      |        ^
main.c: In function 'main':
main.c:7:16: error: 'cin' undeclared (first use in this function)
    7 |         int R; cin >> R;
      |                ^~~
main.c:7:16: note: each undeclared identifier is reported only once for each function it appears in
main.c:9:9: error: 'cout' undeclared (first use in this function)
    9 |         cout << 2 * R * 3.14159265358979 << endl;
      |         ^~~~
main.c:9:45: error: 'endl' undeclared (first use in this function)
    9 |         cout << 2 * R * 3.14159265358979 << endl;
      |                                             ^~~~
Language: C++

#include<iostream>
using namespace std;
int main() {
	double a; cin >> a;
    cout << fixed << setprecision(12) << 2.0 * (22.0/7.0) * r ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:22: error: 'setprecision' was not declared in this scope
    5 |     cout << fixed << setprecision(12) << 2.0 * (22.0/7.0) * r ;
      |                      ^~~~~~~~~~~~
a.cc:2:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    1 | #include<iostream>
  +++ |+#include <iomanip>
    2 | using namespace std;
a.cc:5:61: error: 'r' was not declared in this scope
    5 |     cout << fixed << setprecision(12) << 2.0 * (22.0/7.0) * r ;
      |                                                             ^
Language: C

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>

#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define all(x) (x).begin(),(x).end()
#define int long long
#define pb push_back
using ll = long long;
using namespace std;
int gcd(int a,int b){return b?gcd(b,a%b):a;}
void printV(std::vector<int> const &input){for (int i = 0; i < input.size(); i++)std::cout << input.at(i) << ' ';}

signed main(void){
    int R;
    cin >> R;
    long double temp=2*R*M_PI;
    cout.precision(32);
    cout << temp << endl;
    return 0;
}

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

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

int main(){
	// sengen
	double r;
	// nyuryoku
	cin >> r;
	// keisan
	cout << (double)2*r*pi();
	// syutsuryoku
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:29: error: 'pi' was not declared in this scope
   11 |         cout << (double)2*r*pi();
      |                             ^~
Language: C

import math
R = int(input())
l = math.pi*2*R
print(l)


Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'R'
    2 | R = int(input())
      | ^
Language: C

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

int main() {
  double R;
  cin >> R;
  double c = 0;
  c = 2 * R * 3.141592;
  cout << c << 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 <iostream>
#include <iomanip>
#include <math.h>

const double PI  =3.141592653589793238463;

using namespace std;

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

    cout << fixed << setprecision(12) << 2*PI*n << endl;

    return 0;
}

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

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

int main() {
    double R;
    cin >> R;

    cout << R * 2 * 3.141592 << 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 <iostream>
using namespace std;

int main() {
	// your code goes here
	int r;
	cin>>r;
	double circ;
	circ = 2*3.14159265359;
	circ*=r;
	cout<<circ;
	return 0;
}


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

#include <algorithm>
#include <bitset>
#include <boost/multiprecision/cpp_int.hpp>
#include <algorithm>
#include <climits>
#include <cmath>
#include <cstring>
#include <functional>
#include <iostream>
#include <list>
#include <map>
#include <set>
#include <numeric>
#include <sstream>
#include <stdio.h>
#include <string>
#include <tuple>
#include <vector>
#include<iomanip>
#include <cmath>
#define _USE_MATH_DEFINES
namespace mp = boost::multiprecision;
using namespace std;
using ull = unsigned long long;
using ld = long double;
using lll = boost::multiprecision::cpp_int;
using ll = long long;
#define FOR(i, N) for(ll i = 0; i < N; ++i)

#define ALL(v) (v).begin(), (v).end()
#define RALL(v) (v).rbegin(), (v).rend()
int main(){
  ll R;
  cin>>R;
  printf("%.5lf\n", R*2*M_PI);
  return 0;
}

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

#include <algorithm>
#include <stdio.h>
#include <iostream>
#include <cstdlib>
#include <vector>
#include <queue>
#include <math.h>
#include <string> 
#include <bits/stdc++.h>
using namespace std;

int main(){
    double r;
    cin >> r;
    cout << r*2*3.141592 << endl;
    return 0;
}

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

#include"bits/stdc++.h"
#include<boost/multi_array.hpp>
#include<boost/optional.hpp>
#include<boost/range/irange.hpp>
#include<boost/range/algorithm.hpp>
#include<boost/range/adaptors.hpp>
using namespace std;
namespace adaptor = boost::adaptors;
 
void Main()
{
	int R;
  
  	cin >> R;
    
    printf("%lf", 2.0 * R * 3.1415);
	
	
}
 
int main()
{
	std::cin.tie(nullptr);
	std::ios_base::sync_with_stdio(false);
	std::cout << std::fixed << std::setprecision(15);
	Main();
}

Compiler output:
main.c:1:9: 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;
typedef long long ll;
long double PI = 3.141592653589793238;

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int r;
    cin >> r;

    cout << setprecision(10) << fixed;
    cout << 2*r*PI << "\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>
using namespace std;
#define pb push_back
int main()
{
	int r;
	cin>>r;
	cout<<2*3.14*r;
}

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

from math import pi
print(2*pi*int(input()))

Compiler output:
main.c:1:1: error: unknown type name 'from'
    1 | from math import pi
      | ^~~~
main.c:1:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'import'
    1 | from math import pi
      |           ^~~~~~
main.c:1:11: error: unknown type name 'import'
Language: C

#include <stdio.h>
#include <bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
int main() {
  double a,b;
  cin >> a;
  b = PI*a*2;
  cout << b;
}

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

#include<bits/stdc++.h>
#define fi first
#define se second
#define rep(i, n) for(int (i) = 0; (i) < (n); (i)++)
#define rrep(i, n) for (int (i) = 1; (i) <= (n); (i++))
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define pb push_back
#define eb emplace_back
#define yn {puts("Yes");}else {puts("No");}
#define printd(x) printf("%.12f\n", x);
template<class T> bool chmin(T& a, const T& b) {if (a > b) {a = b; return 1;} return 0;}
template<class T> bool chmax(T& a, const T& b) {if (a < b) {a = b; return 1;} return 0;}
using namespace std;
using ll = long long;
using P = pair<int, int>;


int main() {
	double pi = 3.141592653589793238;

	double r;
	cin >> r;

	printd(r * 2 * pi);
	return 0;
}


Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: Java

public main(){
  double R = 3;
  double e = 3.1415;
  double Answer = 2*e*R;
  System.out.plintln(Answer);
}

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
public main(){
       ^
Main.java:3: error: unnamed classes are a preview feature and are disabled by default.
  double e = 3.1415;
  ^
  (use --enable-preview to enable unnamed classes)
Main.java:5: error: class, interface, enum, or record expected
  System.out.plintln(Answer);
  ^
Main.java:6: error: class, interface, enum, or record expected
}
^
4 errors
Language: C

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for(int i = 0; i < n; i++)
#define COUT(x) cout<<(x)<<endl
#define dump(x)  cout << #x << " = " << (x) << endl;
using ll = long long;
using P = pair<int,int>;
using Graph = vector<vector<int>>;
using M = map<int,int>;
using PQ = priority_queue<int>;
using PQG = priority_queue<int, vector<int>, greater<int>>;
const int INF = 1e9;
const int MOD = 1e9+7;
const ll LINF = 1e18;

int main() {
  int r; cin >> r;
  double ans = 2*r*M_PI;
  cout << fixed << setprecision(10) << ans << endl;
  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 "bits/stdc++.h"
using namespace std;

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


int main() {
	const double PI = 3.14159265358979323846;
	double R;
	cin >> R;
	cout << fixed << setprecision(8) << R * 2 * PI << 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 r; cin>>r;
     double c=2*3.14159265*r;
    cout<<c;
    return 0;
}


Compiler output:
main.c:1:9: 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;
long double n,t1,a,t[1000002];

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> a;
	long double p = 3.14159265358979323;
	cout << setprecision(10) <<  2*p*a << endl;
}

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

#include <iostream>
#include <cmath>
int main(){
  int r;
  cin>>r;
  cout<<44.0/7*r;
  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>>r;
      |   ^~~
      |   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:6:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   cout<<44.0/7*r;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C

// -----------------------------------
// Author     : MatsuTaku
// Country    : Japan
// Created    : 04/19/20 20:43:13
// -----------------------------------

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
  cin.tie(nullptr); ios::sync_with_stdio(false);

  double r; cin>>r;
  cout <<fixed<< r*2*M_PI << endl;

  return 0;
}


Compiler output:
main.c:7:10: fatal error: bits/stdc++.h: No such file or directory
    7 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include<bits/stdc++.h>
#define ll long long
#define MP make_pair
#define PB push_back
#define F first
#define S second
#define MOD 1000000000
#define inf -100000
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
using namespace std;
int main()
{
    fast;
   // #ifndef ONLINE_JUDGE
   // freopen("input.txt", "r", stdin);
   // freopen("output.txt", "w", stdout);
    //#endif
    long double r;
    cin>>r;
    cout<<fixed<<setprecision(15)<<2*M_PI*r<<endl;
}	

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

#include <iostream>
#include <complex>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <numeric>
#include <cstring>
#include <ctime>
#include <cstdlib>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <list>
#include <cmath>
#include <bitset>
#include <cassert>
#include <queue>
#include <stack>
#include <deque>
#include <random>
typedef long long int ll;
typedef long double ld;
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
const ll MOD=1000000007;
const ll MAX_N=500010;
const ll INF=9999999999;

int main(){
    ll r;
    ld pi=3.1415926535;
    cin>>r;
    cout<<setprecision(10)<<2*pi*r;
    return 0;
}

Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.