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

#include "bits/stdc++.h"

using namespace std;
using ll = long long;

const double pi = acos(-1.0);

int main() {
    double r; scanf("%lf", &r);
    printf("%0.12lf\n", 2 * pi * r);
}

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() {
  	const real pi = 3.141592653589793;
  	int x;
  	cin >> x;
  	cout << pi*x*x << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:15: error: 'real' does not name a type
    5 |         const real pi = 3.141592653589793;
      |               ^~~~
a.cc:8:17: error: 'pi' was not declared in this scope
    8 |         cout << pi*x*x << endl;
      |                 ^~
Language: C

#include <iostream>
using namespace std;

int main() {
  	const real pi = 3.141592653589793;
  	int x;
  	cin >> x;
  	cout << pi*x*x << 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>

using namespace std;

typedef long long ll;
typedef long double ld;

const ld PIE = atan2(0, -1);

void solve() {
	ld r;
	cin >> r;
	ld ans = 2.00 * PIE * r;
	cout.precision(100);
	cout << ans << "\n";
}

int main() {
	solve();
	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

import java.util.Scanner;

public class Main
{
    public  static  void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        double a = sc.nextDouble();
        a = a*2*3.14159;
        System.out.print((a));

    }
}


Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.util.Scanner;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.util.Scanner;
      |            ^
main.c:3:1: error: unknown type name 'public'
    3 | public class Main
      | ^~~~~~
main.c:3:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    3 | public class Main
      |              ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  cin >> R;
  cout << 2 * R * 3.1415 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:10: error: 'R' was not declared in this scope
    5 |   cin >> R;
      |          ^
Language: C

#include <bits/stdc++.h>

using namespace std;

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

    // Process
    float ans;
    ans = R * 2 * M_PI;

    // Output
    cout << 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>
#include<limits>
#define ll long long
#define F first
#define S second
#define pb push_back
#define oo (1LL<<63-1)
#define endl '\n'
#define si size()
#define all(v) v.begin(),v.end()
#define FASTIO ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define Matrix vector< vector < long long > >

using namespace std;

int dx[] = {0,0,1,-1};
int dy[] = {1,-1,0,0};

const long double Pi=acos(-1),e=2.718;
const int N=2e5+10, mod=1e9+7;

int main ()
{
    FASTIO
    double r;
    cin >> r;
    cout << setprecision(12) << 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: C

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

#define ll long long
#define ld long double
 
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define repb(i,a,b) for(ll i=a;i>=b;i--)
 
#define err() cout<<"=================================="<<endl;
#define errA(A) for(auto i:A)   cout<<i<<" ";cout<<endl;
#define err1(a) cout<<#a<<" "<<a<<endl
#define err2(a,b) cout<<#a<<" "<<a<<" "<<#b<<" "<<b<<endl
#define err3(a,b,c) cout<<#a<<" "<<a<<" "<<#b<<" "<<b<<" "<<#c<<" "<<c<<endl
#define err4(a,b,c,d) cout<<#a<<" "<<a<<" "<<#b<<" "<<b<<" "<<#c<<" "<<c<<" "<<#d<<" "<<d<<endl

#define pb push_back
#define all(A)  A.begin(),A.end()
#define allr(A)    A.rbegin(),A.rend()
#define ft first
#define sd second
 
#define pll pair<ll,ll>
#define V vector<ll>
#define S set<ll>
#define VV vector<V>
#define Vpll vector<pll>
 
#define endl "\n"
 
const ll logN = 20;
const ll M = 1000000007;
const ll INF = 1e12;
#define PI 3.14159265
 
const ll N = 100005;

void solve(){
	ld r;
	cin>>r;
	cout << fixed << setprecision(6) << 2*PI*r << endl;	
	return;
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	ll no;
	// cin>>no;
	no = 1;
	while(no--){
		solve();
	}
    return 0;
}

Compiler output:
main.c:3:9: fatal error: bits/stdc++.h: No such file or directory
    3 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

import math
r = int(input())
print(r*8*math.pi/4)


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

//Created by Kira

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

#define IOS cin.sync_with_stdio(0);cin.tie(0); cout.tie(0);
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define pii pair<int,int> 
#define pb push_back
#define vi vector<int> 
using ll = long long;

const int mod = 1e9 + 7;

ll pwr(ll a, ll b);
    



int main(){
   IOS

    int r; cin>>r;
    cout<<fixed<<setprecision(6)<<(2.0*3.14*r)<<"\n";







}

ll pwr(ll a, ll b){
   a %= mod;	//Remove mod if not required
   ll res = 1;
   while(b > 0){
    if(b&1)
        res = res * a % mod;
        a = a * a % mod;
    b >>= 1;
    }

    return res;
}



Compiler output:
main.c:3:9: fatal error: bits/stdc++.h: No such file or directory
    3 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <iostream>
#include <numeric>
#include <vector>
#include <math.h>
#include <map>
#include <algorithm>
#include <stdio.h>
#include <set>
#define mod 1000000007
using namespace std; 

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


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;

inline int ctoi(char c) { if(c < '0' || '9' < c) throw invalid_argument("ctoi error"); return c - '0'; }
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define REP(i, k, n) for(int i = (int)(k); i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()

template <typename T>
inline T gcd(T x, T y){
	if (x <= 0 || y <= 0) throw invalid_argument("gcd error: x <= 0 or y <= 0");
	
	if(x < y) swap(x, y);
	T r = x % y;

	while(r != 0){
		x = y;
		y = r;
		r = x % y;
	}

	return y;
}
template <typename T>
inline T lcm(T x, T y){
	if (x <= 0 || y <= 0) throw invalid_argument("lcm error: x <= 0 or y <= 0");

	return x * y / gcd(x, y);
}

#define PI 3.14159265359

int main(){
	int r;
	cin >> r;
	cout << 2 * 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;
#define _GLIBCXX_DEBUG
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define REP(i, n) for (int i = 1; i < (int)(n); i++)
#define Sort(a) sort(a.begin(), a.end())
typedef long long int ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;
template <class T> inline bool chmax(T& a,T b){if(a<b){a=b;return true;} return false;}
template <class T> inline bool chmin(T& a,T b){if(a>b){a=b;return true;} return false;}

int main(){
    double r;
    cin >> r;
    printf("%.3lf", r*2*3.14159265358979);
    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 n;
int main(){
	cin>>n;
	cout<<2*3.14*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

import java.util.*;

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

        int r = sc.nextInt();

        double length = 2*r*3.14;

        System.out.println(length);
    }
}

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.util.*;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.util.*;
      |            ^
main.c:3:1: error: unknown type name 'class'
    3 | class Main{
      | ^~~~~
main.c:3:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    3 | class Main{
      |           ^
Language: Java

public class CirclePond {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		int r = scanner.nextInt();
		
		int pi = 314159;
		
		System.out.println((double)(2*r*pi) / 100000);
	} 

}

Compiler output:
Main.java:1: error: class CirclePond is public, should be declared in a file named CirclePond.java
public class CirclePond {
       ^
Main.java:5: error: cannot find symbol
		Scanner scanner = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class CirclePond
Main.java:5: error: cannot find symbol
		Scanner scanner = new Scanner(System.in);
		                      ^
  symbol:   class Scanner
  location: class CirclePond
3 errors
Language: C++

#inclde <bits/stdc++.h>
using namespace std;
 
int main()
{
  float pi = 3.141592,r;
  cin >> r;
  cout << 2*pi*r;
 
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inclde; did you mean #include?
    1 | #inclde <bits/stdc++.h>
      |  ^~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope
    7 |   cin >> r;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #inclde <bits/stdc++.h>
a.cc:8:3: error: 'cout' was not declared in this scope
    8 |   cout << 2*pi*r;
      |   ^~~~
a.cc:8:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#inclde <bits/stdc++>
using namespace std;

int main()
{
  float pi = 3.141592,r;
  cin >> r;
  cout << 2*pi*r;

}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inclde; did you mean #include?
    1 | #inclde <bits/stdc++>
      |  ^~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope
    7 |   cin >> r;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #inclde <bits/stdc++>
a.cc:8:3: error: 'cout' was not declared in this scope
    8 |   cout << 2*pi*r;
      |   ^~~~
a.cc:8:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C

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

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

    cout << 2 * 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>
typedef long long ll;
const int INF = 1e9;
const int MOD = 1e9 + 7;
using namespace std;

//ループマクロ
#define FOR(i , a , b)  for(int i = (a) ; i < (b) ; i++)
#define REP(i , n)      for(int i = 0 ; i < n ; i++)
#define REPR(i , n)     for(int i = n ; 0 <= i ; i--)
#define ROP(i, n)       for(int i = 1 ; i <= n ; i++)

//入出力
#define SCOUT(x) cout << (x) << " "
#define VECCIN(x) for(auto& ele : (x) ) cin >> ele
#define VECOUT(x) for(auto& ele : (x) ) cout << ele << " "; cout << endl;

//その他
#define ALL(obj) (obj).begin() , (obj).end() 
#define SORT(obj) sort(ALL(obj))
#define GSORT(obj) sort(ALL(obj) , greater<int>())
#define P pair<int , int>
#define V vector<int>
#define VLL vector<long long>
#define M map<int, int>
#define S set<int>
#define PQ priority_queue<int>
#define PQG priority_queue<int , V , greater<int>>

int main(void) {

	ios::sync_with_stdio(false);	cin.tie(0);
    double r;  cin >> r;
    cout << 2 * r * 3.14159265 << 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 <iostream>
#define PI 3.1415

using namespace std;

int main(){
	int R;
	cin >> R;
    cout << 2 * PI * R << 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>
using namespace std;

int main() {
   int R ;
  cin >> R ;
  
  cout << 2 * R * 3,14 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    8 |   cout << 2 * R * 3,14 << endl;
      |                     ~~~^~~~~~~
Language: C++

#include<iostream>

using namespace std;
int main()
{
    int r;
    double a,pi=3.1416;
    cin>>r;
    a=2*pi*r;
    cout<<fixed<<setprecision(20)<<a<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: 'setprecision' was not declared in this scope
   10 |     cout<<fixed<<setprecision(20)<<a<<endl;
      |                  ^~~~~~~~~~~~
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 |
Language: C++

#include<bits\stdc++.h>

using namespace std;
int main()
{
    int r;
    double a,pi=3.1416;
    cin>>r;
    a=2*pi*r;
    cout<<a<<endl;
    return 0;
}


Compiler output:
a.cc: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;
int main()
{
    int r;
    double a,pi=3.1416;
    cin>>r;
    a=2*pi*r;
    cout<<fixed<<setprecision(20)<<a<<endl;
    return 0;
}


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


int main(int argc, char** argv[])
{
  for(int i = 0, i < argc, i++)
  {
    printf("%s\n", argv[i]);
  }
  
  return 0;
}
      

Compiler output:
a.cc:2:5: warning: second argument of 'int main(int, char***)' should be 'char **' [-Wmain]
    2 | int main(int argc, char** argv[])
      |     ^~~~
a.cc: In function 'int main(int, char***)':
a.cc:4:19: error: expected ';' before '<' token
    4 |   for(int i = 0, i < argc, i++)
      |                   ^~
      |                   ;
a.cc:4:20: error: expected primary-expression before '<' token
    4 |   for(int i = 0, i < argc, i++)
      |                    ^
a.cc:4:31: error: expected ';' before ')' token
    4 |   for(int i = 0, i < argc, i++)
      |                               ^
      |                               ;
a.cc:6:5: error: 'printf' was not declared in this scope
    6 |     printf("%s\n", argv[i]);
      |     ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 |
Language: C

#include<iostream>
using namespace std;
#define pi 3.14159265358979
int main(){
	double n;
	cin>>n;
	cout<<n*2*pi<<"\n";
	return 0;
}


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

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


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

import java.lang.Math;
import java.util.*;
 
class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int r = sc.nextInt();
        System.out.print(r*6.28);
    }
}

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.lang.Math;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.lang.Math;
      |            ^
main.c:2:1: error: unknown type name 'import'
    2 | import java.util.*;
      | ^~~~~~
main.c:2:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    2 | import java.util.*;
      |            ^
main.c:4:1: error: unknown type name 'class'
    4 | class Main {
      | ^~~~~
main.c:4:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    4 | class Main {
      |            ^
Language: C

/*Author SHUBH AGRAWAL  */

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define pu push  //  adds the value to the last of the queue 
#define lld long long int
#define ins insert /// used in set to insert the values 
#define adv advance  /// used to increment the iterator
#define mp make_pair
#define fi first
#define se second
#define all(c) c.begin(),c.end()
#define PI 3.1415926
#define INF (lld)1e18
#define vl  vector<long long int >
#define vpl vector< pair<lld ,lld> >
#define vvl vector<vector<lld> > 
#define pll pair <lld,lld>
long long int modp(lld a,lld p,lld n)
{
    int d[100];
    int i,j,k,l;
    if(n==0) return 1;
    for(i=0;n>=1;i++)
    {
        d[i]=n%2;
        n/=2;
    }
    l=i;
    long long int e=1;
    if(d[0]==1) e*=(a%p);
    for(i=1;i<l;i++)
    {
        a*=a;
        a=a%p;
        if(d[i]==1) 
        {
            e*=a;
            e=e%p;
        }
    }
    return e%p;
}
lld modInverse(lld n, lld p) 
{ 
    return modp(n, p, p-2); 
}

long long int nCrModPFermat(lld n, lld r,lld p) 
{ 
   // Base case 
   if (r==0) 
      return 1; 
    
    // Fill factorial array so that we 
    // can find all factorial of r, n 
    // and n-r 
    
    lld fac[n+1]; 
    fac[0] = 1; 
    for (lld i=1 ; i<=n; i++) 
    fac[i] = fac[i-1]*i%p; 
     
    return (fac[n]* modInverse(fac[r], p) % p * 
            modInverse(fac[n-r], p) % p) % p; 
}


long long int gcd(lld b,lld a)
{
    if(a<b) return gcd(a,b);
    if(a%b==0) return b;
    return gcd(a%b , b);
}

lld p1=1000000007,p2=998244353;
lld l,r,mid,ans;
lld n,m,i,j,k;
lld x,y,n1,a,b,n2,h,z,c;
queue<lld> q;
lld d,p=1000000000;
vector< vector <lld > > v(100001);

void bfs(lld x , vector<lld>& d)
{
    d[x]=0;
    q.pu(x);
    while(!q.empty())
    {
        x=q.front();
        q.pop();
        l=v[x].size();
        for(i=0;i<l;i++)
        {
            y=v[x][i];
            if(d[y]==INF) 
            {
                d[y] = d[x]+1;
                q.pu(y);
            }       
        }
    }

}
/*
lld DFS(lld a ,lld x)
{
    visited[a] =true;
    sub_size[a]=1;
 //   if(a==x) 
   //     cont[a] =true;
    lld l= v[a].size();
    for(lld i=0;i<l;i++)
    {
        if(visited[v[a][i]] == false)
        {
            sub_size[a]+= DFS(v[a][i],b);
//            if(cont[v[a][i]] ==true ) cont[a]=true;
        }
    }
    return sub_size[a];

}
*/

void solve()
{
     cin>>n;
     float p=3.14159;
     cout<<2*p*n;
     
}



int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    lld t=1;
//    cin>>t;
    for(int i=0;i<t;i++)
    {
    //    cout<<"Case #"<<i+1<<": ";
        solve();
        cout<<"\n";
    }

    return 0;
}


Compiler output:
main.c:3:9: fatal error: bits/stdc++.h: No such file or directory
    3 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include<bits/stdc++.h>

using namespace std;

int main(){
  cin>>n;
  float p=3.14159;
  cout<<2*p*n;
  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 rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;

const int MOD = 1000000007;
const int INF = 999999999;

int main(){
   int r;
   cin >> r;
   cout << 2*r*acos(-1) << 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 <iostream>
#include <cmath>

int main() {
  int r;
  double pi = acos(-1);
  std::cin >> r;
  std::cout << 2 * r * pi << std::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"
using namespace std;

int main() {
  cout << fixed << setprecision(15);
  int R;
  cin >> R;
  cout << (M_PI * 2 * 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

#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <vector>
#include <algorithm>
#include <functional>
#include <ccomplex>
#include <unordered_map>
#include <cstring>
#include <iostream>
#include <numeric>
#include <sstream>
#include <set>
#include <map>
#include <tuple>
#include <iomanip>

using namespace std;
#define MAX 1LL << 60
#define MOD 1000000007
#define BOX 200000

typedef long long ll;

#define rep(i, s, e) for(unsigned int i = s; i < e; i++)
#define repR(i, s, e) for(ll i = s; i > e; i--)
#define reft0(i, j) setfill('0') << setw(i) << j
#define fix(i) fixed << setprecision(i)
#define so(a) sort(begin(a), end(a))
#define soR(a) sort(begin(a), end(a), greater<ll>())
#define uni(a) a.erase(unique(begin(a), end(a)), end(a))
#define sum(a) accumulate(begin(a), end(a), 0)


template<class T> inline bool chMax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chMin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

int main() {
    ll R;
    cin >> R;
    cout << R * 2 * M_PI << endl;
    return 0;

}

Compiler output:
main.c:3:10: fatal error: cstdio: No such file or directory
    3 | #include <cstdio>
      |          ^~~~~~~~
compilation terminated.
Language: C

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

using namespace std;
int main() {
	double n;
	cin >> n;
	cout << n * 2 * M_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 namaspace std;


int main(){
 	float r;
  cin>>r;
  int a = 6.28318530717958623200;
  cout<<fixed<<setprecision(10);
  cout<<a*r<<endl;

  return 0;
}


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namaspace'
    2 | using namaspace std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin>>r;
      |   ^~~
      |   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:9:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |   cout<<fixed<<setprecision(10);
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:9: error: 'fixed' was not declared in this scope
    9 |   cout<<fixed<<setprecision(10);
      |         ^~~~~
a.cc:9:9: note: suggested alternatives:
In file included from /usr/include/c++/14/streambuf:43,
                 from /usr/include/c++/14/bits/streambuf_iterator.h:35,
                 from /usr/include/c++/14/iterator:66,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:54:
/usr/include/c++/14/bits/ios_base.h:1104:3: note:   'std::fixed'
 1104 |   fixed(ios_base& __base)
      |   ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:198:
/usr/include/c++/14/charconv:622:21: note:   'std::chars_format::fixed'
  622 |     scientific = 1, fixed = 2, hex = 4, general = fixed | scientific
      |                     ^~~~~
a.cc:9:16: error: 'setprecision' was not declared in this scope; did you mean 'std::setprecision'?
    9 |   cout<<fixed<<setprecision(10);
      |                ^~~~~~~~~~~~
      |                std::setprecision
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:143:
/usr/include/c++/14/iomanip:202:3: note: 'std::setprecision' declared here
  202 |   setprecision(int __n)
      |   ^~~~~~~~~~~~
a.cc:10:14: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |   cout<<a*r<<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<bits/stdc++.h>
using namaspace std;


int main(){
 	int r;
  cin>>r;
  int a = 6.28318530717958623200;
  cout<<fixed<<setprecision(10);
  cout<<a*r<<endl;

  return 0;
}


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namaspace'
    2 | using namaspace std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin>>r;
      |   ^~~
      |   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:9:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |   cout<<fixed<<setprecision(10);
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:9: error: 'fixed' was not declared in this scope
    9 |   cout<<fixed<<setprecision(10);
      |         ^~~~~
a.cc:9:9: note: suggested alternatives:
In file included from /usr/include/c++/14/streambuf:43,
                 from /usr/include/c++/14/bits/streambuf_iterator.h:35,
                 from /usr/include/c++/14/iterator:66,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:54:
/usr/include/c++/14/bits/ios_base.h:1104:3: note:   'std::fixed'
 1104 |   fixed(ios_base& __base)
      |   ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:198:
/usr/include/c++/14/charconv:622:21: note:   'std::chars_format::fixed'
  622 |     scientific = 1, fixed = 2, hex = 4, general = fixed | scientific
      |                     ^~~~~
a.cc:9:16: error: 'setprecision' was not declared in this scope; did you mean 'std::setprecision'?
    9 |   cout<<fixed<<setprecision(10);
      |                ^~~~~~~~~~~~
      |                std::setprecision
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:143:
/usr/include/c++/14/iomanip:202:3: note: 'std::setprecision' declared here
  202 |   setprecision(int __n)
      |   ^~~~~~~~~~~~
a.cc:10:14: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |   cout<<a*r<<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<bits/stdc++.h>
using namaspace std;


int main(){
 	int r;
  cin>>r;
  int a = 6.28318530717958623200;
  cout<<fixed<<setprecision(10);
  cout<<a*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

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

int main(){
	double ans,pie=3.14159265358993238462643383279;
	int n;
	cin >> n;
	ans=(n*2)*pie;
	cout << setprecision(20)<<ans;
	return 0;
}

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

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

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

    double p = 3.1415926535;

    cout << fixed << setprecision(15) << 2 * p * R << endl;
}

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

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef pair<int, int> P;
typedef vector<vector<int>> Matrix;
static const int INF = 2000000000;



int main(){
  int r;
  cin >> r;
  double pi = 3.14159265
  double ans = r * 2 * pi;
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:3: error: expected ',' or ';' before 'double'
   17 |   double ans = r * 2 * pi;
      |   ^~~~~~
a.cc:18:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   18 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef pair<int, int> P;
typedef vector<vector<int>> Matrix;
static const int INF = 2000000000;



int main(){
  int r;
  cin >> r;
  double pi = 3.14159265
  double ans = r * 2 * pi;
  cout << ans << endl;
}

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

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef pair<int, int> P;
typedef vector<vector<int>> Matrix;
static const int INF = 2000000000;



int main(){
  int r;
  cin >> r;
  double ans = r * 2 * 3.1419265;
  cout << ans << endl;
}

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

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef pair<int, int> P;
typedef vector<vector<int>> Matrix;
static const int INF = 2000000000;



int main(){
  int r;
  cin >> r;
  double ans = r * 2 * 3.1419265;
  cout << fixed << setprecision(5) << ans << endl;
}

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

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef pair<int, int> P;
typedef vector<vector<int>> Matrix;
static const int INF = 2000000000;



int main(){
  int r;
  cin >> r;
  double ans = r * 2 * 3.1419265;
  cout << fixed<< setprecision(5) << ans << endl;
}

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 <stdio.h>

int main(void) {
    
    int N = 0;
    int M = 0;
    scanf("%d %d", &N, &M);
    
    int x[M] = { 0 };
    for (int i = 0; i < M; i++ ) {
        scanf("%d ", &x[i]);
    }
    
    int total = 0;

    for (int i = 0; i < M; i++) {
        total += x[i];
    }
    
    int pol = N - total;
    if (pol >= 0) {
        printf("%d", pol);
    }
    else {
        printf("%d",-1);
    }
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:9:16: error: variable-sized object may not be initialized except with an empty initializer
    9 |     int x[M] = { 0 };
      |                ^
Language: C

#include <stdio.h>

int main(void) {
    
    int N = 0;
    int M = 0;
    scanf("%d %d", &N, &M);
    
    int x[M] = { 0 };
    for (int i = 0; i < M; i++ ) {
        scanf("%d ", &x[i]);
    }
    
    int total = 0;

    for (int i = 0; i < M; i++) {
        total += x[i];
    }
    
    int pol = N - total;
    if (pol >= 0) {
        printf("%d", pol);
    }
    else {
        printf("%d",-1);
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:16: error: variable-sized object may not be initialized except with an empty initializer
    9 |     int x[M] = { 0 };
      |                ^
Language: C

#include <iostream>
#include <vector>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
#include <sstream>
#include <set>
#include <string>
#include <math.h>
#include <map>
#include <climits>
#include <iomanip>


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

#define ll long long
#define _USE_MATH_DEFINES

using namespace std;

void A();
void B();
void C();
void D();
void E();
void F();

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

	A();


}

void A() {
	int n;
	cin >> n;

	double cir = n * 2 * 3.14159265358979323846;
	cout << setprecision(8) << cir << endl;
}
 
void B() {
	int T;
	cin >> T;
	for (int t = 1; t <= T; t++) {

		int N;
		cin >> N;


		int result = 0;

		cout << "Case #" << t << ": ";

		cout << result << endl;

	}
}

void C() {
	int T;
	cin >> T;
	for (int t = 1; t <= T; t++) {

		int N;
		cin >> N;


		int result = 0;

		cout << "Case #" << t << ": ";

		cout << result << endl;

	}
}

void D() {
	int T;
	cin >> T;
	for (int t = 1; t <= T; t++) {

		int N;
		cin >> N;


		int result = 0;

		cout << "Case #" << t << ": ";

		cout << result << endl;

	}
}

void E() {
	int T;
	cin >> T;
	for (int t = 1; t <= T; t++) {

		int N;
		cin >> N;


		int result = 0;

		cout << "Case #" << t << ": ";

		cout << result << endl;

	}
}

void F() {
	int T;
	cin >> T;
	for (int t = 1; t <= T; t++) {

		int N;
		cin >> N;


		int result = 0;

		cout << "Case #" << t << ": ";

		cout << result << endl;

	}
}



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

#include <iostream>
using namespace std;

int main() {
	int R ;
	double pi = 3.14;
	cin >> R;
	double c = 2*pi*R;
	 
	 cout << c << endl;
	
	// your code goes here
	return 0;
}

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

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

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.io.*;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.io.*;
      |            ^
main.c:2:1: error: unknown type name 'import'
    2 | import java.util.*;
      | ^~~~~~
main.c:2:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    2 | import java.util.*;
      |            ^
main.c:3:1: error: unknown type name 'import'
    3 | import java.lang.Math;
      | ^~~~~~
main.c:3:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    3 | import java.lang.Math;
      |            ^
main.c:4:1: error: unknown type name 'public'
    4 | public class Main{
      | ^~~~~~
main.c:4:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    4 | public class Main{
      |              ^~~~
Language: Java

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

Compiler output:
Main.java:8: error: ';' expected
      System.out.println(+Math.PI*2*r)
                                      ^
1 error
Language: C

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long;
ll GetDigit(ll num){ return log10(num)+1; } //numの桁数を求める
#define pi 3.141592653589793238462643383279 
int main()
{
    int 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 <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <map>
#include <algorithm>
#include <iomanip>
#include <queue>
#include <utility>
#include <set>
#include <unordered_set>
#include <stack>
#include <iterator>
#include <random>
#include <fstream>
#include <chrono>
using namespace std;
#define int long long
void fast(){
    ios_base:: sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int32_t main()
{
    fast();
    double n;
    cin >> n;
    cout << 6.28318530717958623200*n << "\n";
    return 0;
}


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

#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <map>
#include <algorithm>
#include <iomanip>
#include <queue>
#include <utility>
#include <set>
#include <unordered_set>
#include <stack>
#include <iterator>
#include <random>
#include <fstream>
#include <chrono>
using namespace std;
#define int long long
int m = 1e9 + 7;

vector<int>fact,inv_fact;
void fast(){
    ios_base:: sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int bin_pow(int a,int b){
    if(b==0)
        return 1;
    int res = bin_pow(a,b/2);
    res = (res*res)%m;
    if(b % 2 == 1){
        res= (res*a)%m;
    }
    return res;
}
int inv(int a){
    return bin_pow(a, m-2);
}
int C(int n, int k){
    return (((fact[n]*inv_fact[k])%m)*inv_fact[n-k])%m;
}
int32_t main()
{
    fast();
    double n;
    cin >> n;
    cout << 6.28318530717958623200*n << "\n";
    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>
using namespace std;
int main()
{
double r;
cin >> r;
cout << double(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++

#include<bits/stdc++.h>
using namespace std;
 int main()
 {
   long long double i,c;
   cin>>i;
   c=6.28318530717958623200*i;
   cout<<c;
	return 0;
   
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'long long' specified with 'double'
    5 |    long long double i,c;
      |         ^~~~
a.cc:5:9: error: 'long long' specified with 'double'
Language: C++

#include<bits/stdc++>
using namespace std;
 int main()
 {
   long long double i,c;
   cin>>i;
   c=6.28318530717958623200*i;
   cout<<c;
	return 0;
   
 }

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

#include<bits/stdc++>
using namespace std;
 int main()
 {
   long long double i,c;
   cin>>i;
   c=6.28318530717958623200*i;
   cout<<c;
	return 0;
   
 }

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

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<vector<pair<int, int>>> vvpp;
typedef vector<ll> vll;
typedef vector<vector<ll>> vvll;
typedef vector<pair<int, int>> vpp;
typedef vector<string> vs;
typedef unordered_set<int> si;
typedef pair<int, int> pp;

#define all(n) (n).begin(), (n).end()
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)

template <typename Arg1>
void out(Arg1&& arg1) {
    cout << arg1 << '\n';
}

template <typename Arg1, typename ...Args>
void out(Arg1&& arg1, Args&& ...args) {
    cout << arg1 << ' ';
    out(args...);
}


template <typename T>
void outarr(vector<T> arr) {
    for (int i = 0; i < arr.size() -1; ++i) cout << arr[i] << ' ';
    cout << arr.back() << '\n';
}

template <typename T>
void printV(vector<T> A) {
    if (A.empty()) cerr << "EMTPY\n";
    else { 
        cerr << "[";
        for (int i = 0; i < A.size() -1 ; ++i) {
            cerr << A[i] << ", ";
        }
        if (A.size()) cerr << A.back() << "]\n";
    }
}


template <typename T>
void printVV(vector<vector<T>> A) {
    cerr << "[";
    for (auto v : A) {
        printV<T>(v);
    }
    cerr << "]";
}

template <typename Arg1>
void __f(const char* name, Arg1&& arg1) {
    cerr << name << ": " << arg1 << endl;
}

template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&& ...args) {
    const char* comma = strchr(names + 1, ',');
    cerr.write(names, comma - names) << ": " << arg1 << " |";
    __f(comma + 1, args...);
}

int main(int argc, char **argv) {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int R; cin >> R;
    cout << M_PI * 2 * R << 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 int long long
#define sz(x) (int)(x.size())
using namespace std;

const int N = 2e5 + 5, inf = 1e18, mod = 1e9 + 7;


int32_t main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);  


    int r;
    cin >> r;
    cout << fixed << setprecision(12);
    double ans = 2 * (3.14159 * r);
    cout << 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>
#include <cmath>

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

    long double pi = std::atan2(1, 1) * 4;

    std::cout << 2 * pi * R << std::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<iostream>
#include<cmath>

#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i, x, n) for (int i = x; i < (n); ++i)

using namespace std;

int main() {
    const double PI = 4 * atan(1);
    int R;
    cin >> R;

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

int main() {
    int r; cin >> r;
    double pi = 3.14159265358979;
    cout << 2 * pi * r << endl; 
}

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

#include<iostream>
#include<cmath>

int main(){

    double r;
    std::cin >> r;

    std::printf("%.6f\n", 2.0 * r * M_PI);

    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 ll long long
#define rep(i,n) for(long long (i)=0;(i)<(n);++(i))
#define ref(i,a,b) for (long long (i)=(a); (i)<=(b); ++(i))
#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define mp make_pair
const int mx=2e6+5;

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	double r;cin >> r;
	cout << M_PI*2*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;
int main() {
    double R;
    cin >> R;
    cout << R * 2 * 3.14159 << 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 <string>
#include <vector>
#include <cstdlib>
#include <algorithm>
#define _USE_MATH_DEFINES
#include<math.h>
#define in(n) for (int i=0; i<n;i++)
#define inj(n)for (int j=0; j<n;j++)
using namespace std;

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

	vector<int> A(N);
	in(N - 1) {
		int tmp;
		cin >> tmp;
		A[tmp - 1]++;
	}

	for (auto&& a : A) {
		cout << a << 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>
using namespace std;
int main(){
	int R;
	double res;
	cin>>R;
	res=2*PI*R;
	cout<<res;
	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:15: error: 'PI' was not declared in this scope
    7 |         res=2*PI*R;
      |               ^~