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

nclude<bits/stdc++.h>
using namespace std;
 
typedef unsigned long long ull;
typedef long long ll;
 
int main(){ 
  int R;
  cin >> R;
  cout << (double)2*R*3.1415926 <<endl;
}

Compiler output:
a.cc:1:1: error: 'nclude' does not name a type
    1 | nclude<bits/stdc++.h>
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:9:3: error: 'cin' was not declared in this scope
    9 |   cin >> R;
      |   ^~~
a.cc:10:3: error: 'cout' was not declared in this scope
   10 |   cout << (double)2*R*3.1415926 <<endl;
      |   ^~~~
a.cc:10:35: error: 'endl' was not declared in this scope
   10 |   cout << (double)2*R*3.1415926 <<endl;
      |                                   ^~~~
Language: C

#include <iostream>
#include <set>
#include <map>
#include <string>
#include <math.h>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <bitset>
#include <string.h>

using namespace std;

// #define for(i,a,b) for (int i=(a);i<(b);++i)
typedef long long ll;
typedef pair<ll,ll> P;
#define REP(i,n) for(long long i = 0; i < (long long)(n); i++)
#define pb push_back // vectorに要素追加
#define INF (ll)1e18

ll mod = 1e9+7;
const ll MAX_N = 3000;
/**/
int main() {
	// 入力
	ll R;cin>>R;
    
	// 解法
	double ans = R * 2 *M_PI;
	//出力
	printf("%.10f\n", ans);
}


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;

int main() {
	double R;
	cin>>R;
	cout<<2*M_PI*R<<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 <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); i++)
using namespace std;
using ll = long long;

int main(){
  int r;
  cin >>r;
  double ans = 2*r*3.141592653;
  cout << fixed << setprecision(6) << 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;
const int N=2e5+5;
int inf=0x3f3f3f3f;
typedef pair<int,int> pa;

double PI=3.141592654;

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


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

#include <iostream>
using namespace std;
int main()
{
    double pie=3.14,R,C;
    cin >> R;
    C=2*pie*R;
    cout << C << "\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;
typedef long long ll;

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

  int n;
  cin>>n;

  double pi = acos(-1);
  cout.precision(10);
  cout<<fixed<<pi * 2 * n << 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>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int r;
    cin >> r;
    cout << 2*3.14*r;
}

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

//https://codeforces.com/contest/1335/problem/

#include <bits/stdc++.h>
#define ll long long int
#define pll pair<ll, ll>
#define pii pair<int, int>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    double tpi = 6.28318530717958623200;
    double x;
    cin >> x;
    double z = tpi * x;
    cout << setprecision(3) << fixed;
    cout << tpi << '\n';
    return 0;
}

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

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<set>
#include<vector>
using namespace std;
#define PI acos(-1)
int main(){
    double r;
    double cum;
    cin>>r;
    cum=2*PI*r;
    printf("%.20f",cum);
    
    
    
    
    
    
}

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>
# define M_PI 3.14159265358979323846
using namespace std;
double pi,r;
int main()
{   pi=3.14;
    cin>>r;
    cout<<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 <iostream>
#include <stdio.h>
#include <string>
#include <vector>
#include <map>
#include <algorithm>
#include <math.h>

using namespace std;

int main(){
    double r, ans;
    cin >> r;
    ans = 2.0*r*M_PI;
    cout << fixed << ans;
    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 <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <string>
using namespace std;
typedef long long int ll;
typedef vector<int> vi;
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define Sort(a) sort(a.begin(), a.end())
const int INF = 1<<30;
const ll MOD = 1000000007;

int main(void) {

    double R; cin >> R;
    cout << 2 * R * M_PI << 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 << 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>
    #include <ext/pb_ds/tree_policy.hpp> 
    #include <functional> // for less 
    using namespace __gnu_pbds; 
    using namespace std;
    //typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;    
    #define ll            long long
    #define pb            push_back
    #define ppb           pop_back
    #define si            set <ll>
    #define endl          '\n'
    #define fr            first
    #define sc            second
    #define mii           map<ll ,ll >
    #define msi           map<string,ll >
    #define mis           map<ll , string>
    #define rep(i,a,b)    for(ll  i=a;i<b;i++)
    #define all(v)        v.begin(),v.end()
    #define sort(v)       sort(all(v))
    #define pii           pair<ll ,ll >
    #define vi            vector<ll >
    #define vii           vector<pair<ll , ll >>
    #define vs            vector<string>
    #define sz(x)         (ll)x.size()
    #define M             1000000007
    #define bs            binary_search
    #define rev(a)        reverse(all(a));
    #define sp(n)         setprecision(n)
    #define spl           " "
    #define arr(a,n)      rep(i,0,n) cin>>a[i]
    #define mod           998244353
    #define print_vector(a)  for(auto t:a) cout<<t<<" ";cout<<endl;
    #define print_arr(a,n)   rep(i,0,n) cout<<a[i]<<" "; cout<<endl;        
    #define show(a,n)     for(ll i=0;i<n;i++) cout<<a[i]<<" "; cout<<endl;
    #define N             100000000
    #define debug(x)      cout << #x << " is " << x << endl;
    #define time          cout << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
    #define INF           1ll<<31
    #define M_PI 3.14159265358979323846
    using namespace std;
    ll min(ll a,ll b)
    {
        return a>b?b:a;
    }
    ll max(ll a,ll b)
    {
        return a>b?a:b;
    }
    const ll maxn=2e5+500;
    void solve()
    {
      ll r;
      cin>>r;
      cout<<fixed<<sp(18);
      double rr=2*M_PI*r;
      cout<<rr<<endl;

    }
    signed main()
    {
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);
        #ifndef ONLINE_JUDGE
        //freopen("input.txt","r",stdin);
        //freopen("output.txt","w",stdout);
        #endif
        ll t=1;
        //cin>>t;
        while(t--) solve();
    }


Compiler output:
main.c:1:13: 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;
  int answer = R*2*3.1415926;
  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 <iostream>
using namespace std;
int main(void){
    // Your code here!
    double R;
    cin >> R;
    
    cout << R * 2.0 * 3.14159265359 << endl;
}


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

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


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:2:2: error: unknown type name 'class'
    2 |  class Solution {
      |  ^~~~~
main.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    2 |  class Solution {
      |                 ^
Language: C

#include<bits/stdc++.h>
using namespace std;
#define LL long long int
#define DL double
#define MLL map<LL,LL>::iterator
#define MSL map<string,L>::iterator
#define MLS map<LL,string>::iterator
#define MSS map<string,string>::iterator
#define MCL map<char,LL>::iterator
#define SL set<LL>::iterator
#define SS set<string>::iterator
#define VL V<LL>::iterator
#define G getline
#define SZ size()
#define IN insert
#define C clear()
#define B begin()
#define F front()
#define T top()
#define E end()
#define EM empty()
#define V vector
#define Q queue
#define DQ deque
#define PQ priority_queue
#define ST stack
#define FI first
#define MAX 1e18
#define MIN -1e18
#define SE second
#define PI acos(-1)
#define PS push
#define PP pop()
#define PSF push_front
#define PSB push_back
#define PPF pop_front()
#define PPB pop_back()
#define endl "\n"
#define FAST ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
V<LL>v;
map<LL,LL>u;
void Y()
{
    cout<<"Yes"<<endl;
}
void N()
{
    cout<<"No"<<endl;
}
int main()
{
    FAST;
    LL n,m,i,j,k,p,q,o,l,s,t,z=0,r;
    string a,b,c;
    DL x,y;
   cin>>n;
   x=(DL)n;
   cout<<fixed<<setprecision(2)<<2*PI*x<<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>
#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 * 3.14159265;
	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;

int main() {

	long long r;

	cin >> r;

	cout << 2 * 3.14159265*(double)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

//Bismillahir Rahmanir Raheem
//In the name of Allah , Most Gracious , Most Merciful

/*

  * * * * * * *   * * * * * * *   *           *   * * *   * * * * * *
              *   *           *   *           *     *     *           *
              *   *           *   *           *     *     *             *
              *   *           *   *           *     *     *             *
              *   * * * * * * *   * * * * * * *     *     *             *
  *           *   *           *   *           *     *     *             *
  *           *   *           *   *           *     *     *             *
  *           *   *           *   *           *     *     *           *
  * * * * * * *   *           *   *           *   * * *   * * * * * *

*/

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

#define BOOST ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL)
#define DEBUG freopen("input.txt","r",stdin)


int main()
{
    BOOST;
    //DEBUG;

    double r,c;
    cin>>r;
    c=2*3.14159*r;
    cout<<c<<endl;
    return 0;
}


Compiler output:
main.c:18:9: fatal error: bits/stdc++.h: No such file or directory
   18 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <stdio.h>
int main(){
  double a,b;
  scanf("%lf",&a);
  b=3.14*a*2;
  printf("%lf",b);
  return 0;
  ]

Compiler output:
main.c: In function 'main':
main.c:8:3: error: expected statement before ']' token
    8 |   ]
      |   ^
main.c:8:3: error: expected declaration or statement at end of input
Language: C

#include<bits/stdc++.h>

#define rep(i,n) for(int i = 0;i < n;++i)
#define rep2(i,n,m) for(int i = n;i < m;++i)
#define all(v) v.begin(),v.end()

using namespace std;
using ll = long long;


int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    double l;
    const double PI=3.14159265358979323846;
    cin >> n;
    l = 2*n*PI;
    cout << fixed << setprecision(8);
    cout << l << endl;


    cout << 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 <cstring>
#include <algorithm>
#include <vector>
#include <string>
#include <math.h>
#include <iomanip>
#include <limits>
#include <list>
#include <queue>
#include <tuple>
#include <map>
using namespace std;
#define MOD (long long int)(1e9+7)
#define ll long long int
#define rep(i,n) for(int i=0; i<(int)(n); i++)
#define reps(i,n) for(int i=1; i<=(int)(n); i++)
#define REP(i,n) for(int i=n-1; i>=0; i--)
#define REPS(i,n) for(int i=n; i>0; i--)
#define INF (int)(1123456789)
#define LINF (long long int)(112345678901234567)
#define chmax(a, b) a = (((a)<(b)) ? (b) : (a))
#define chmin(a, b) a = (((a)>(b)) ? (b) : (a))
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define PB push_back
#define SP << " " <<

typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<ll> VL;
typedef vector<VL> VVL;

__attribute__((constructor))
void initial(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed <<setprecision(15);
}


int main(void){
	double r;
    cin >> r;
    r = r*2*3.1415926;
    cout << 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(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  
  double r;
  cin>>r;
  
  cout<<(3.14 * r * r)<<endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:11:30: error: expected '}' at end of input
   11 |   cout<<(3.14 * r * r)<<endl;
      |                              ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C

#include <bits/stdc++.h>

#define rep(l, r) for (int i = (l); i < (r); i++)

typedef long long ll;
 
using namespace std;

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

    cout << (double(r) * 3.141592 * 2.0) << 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 a;
  cin >> a;
  cout << a*2*3.14159265358979 << 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;
#define PI 6.28318530717958623200;
int main()
{
	int r;
	double c;
	cin >> r;
	c = r * PI;
	cout << c << 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;
#define ll long long 

int main() {

	long double a;
	scanf("%llf", &a);
	long double b;
	b = 22.0 / 7.0;
	b *= 2.0;
	printf("%llf", a * b);
}

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 pi=3.141592;
    int R;cin>>R;
    cout<<pi*R*2<<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<algorithm>
#include<vector>
#include<string>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<functional>
#include<math.h>
using namespace std;
#define N (1000000000+7)
#define M (998244353)
#define INF 1e16
typedef long long ll;
typedef pair<int,int> P;



const double PI=3.14159265358979323846;

int main(void){
    ll r;
    cin>>r;
    printf("%.10lf",(double)2.0*PI*r);
    cout<<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;

int main {
  
  int N;
  cin >> N;
  cout << N * 3.14 << endl;
}


Compiler output:
a.cc:4:5: error: cannot declare '::main' to be a global variable
    4 | int main {
      |     ^~~~
a.cc:6:3: error: expected primary-expression before 'int'
    6 |   int N;
      |   ^~~
a.cc:6:3: error: expected '}' before 'int'
a.cc:4:10: note: to match this '{'
    4 | int main {
      |          ^
a.cc:7:3: error: 'cin' does not name a type
    7 |   cin >> N;
      |   ^~~
a.cc:8:3: error: 'cout' does not name a type
    8 |   cout << N * 3.14 << endl;
      |   ^~~~
a.cc:9:1: error: expected declaration before '}' token
    9 | }
      | ^
Language: C

#include<iostream>
#include<bits/stdc++.h>
#include<algorithm>
#include<string>
using namespace std;
int main()
{
    int n;
    double rafi;
    cin>>n;
    rafi=2*3.1416*n;
    cout<<rafi<<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>
#include <math.h>
using namespace std;
int main(void){
    // Your code here!
    int R;
    cin >> R;
    cout << 2*M_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 <bits/stdc++.h>//復習必須
#include<iostream>
#include<vector>
#include <cmath>
#include <map>
#include <algorithm>
#include <string>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
#define P pair<int, int>
int main () {
    double r ;
    cin >> r ;
    const double PI=3.14159265358979323846;

    cout << 2 * PI * 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>//復習必須
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < n; i++)
#define inf 1000000000
typedef long long ll;

int main(){
    int r;
    cin >> r;
    r*=2;

    double ans = r*3.14159265358979;

    printf("%.9f\n", 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>
  
using namespace std;
 
int main(){
  int r;
  cin >> r;
  cout << 2*3.14159*r << endl;
  
  return0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: 'return0' was not declared in this scope
   10 |   return0;
      |   ^~~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
int r;
const double PI=3.1415926;
int main()
{
	cin>>r;
	cout<<(double)r*2.0*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: C

#include<iostream>
#include<cmath>

using namespace std;


int main() {
    double s;
    double R;

    cin >> R;

    s = R * M_PI * 2.0;

    cout << s << 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 <stdio.h>
using namespace std;

int main(){
    int n;
    scanf("%d", &n);
    float ans;
    ans = 2 * n * 3.1415926;
    printf("%.2f", ans);

    
}

Compiler output:
main.c:3:1: error: unknown type name 'using'
    3 | using namespace std;
      | ^~~~~
main.c:3:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    3 | using namespace std;
      |                 ^~~
Language: C

#include<bits/stdc++.h>
#define sutu (ll)1e18+10
#define ll long long
using namespace std;
#define  pi  3.141592653
int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  ll t,n;
  cin>>t;
  cout<<(2*(pi*t))<<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<bits/stdc++.h>
using namespace std;
#define ll long long int
#define set_bits(a) __builtin_popcount(a)
#define pb push_back
#define pf push_front
#define mod 1000000007
#define M 998244353
#define fi first
#define se second
#define endl '\n'
#define INF 1e18
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
# define    PI                  3.14159265358979323846
 
int main()
{
    ll r;
    cin>>r;
 
    double ans = 2*PI*r;
    cout<<fixed<<setprecision(20)<<ans<<endl;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:19:5: error: 'cin' was not declared in this scope
   19 |     cin>>r;
      |     ^~~
a.cc:22:5: error: 'cout' was not declared in this scope
   22 |     cout<<fixed<<setprecision(20)<<ans<<endl;
      |     ^~~~
a.cc:22:11: error: 'fixed' was not declared in this scope
   22 |     cout<<fixed<<setprecision(20)<<ans<<endl;
      |           ^~~~~
a.cc:22:18: error: 'setprecision' was not declared in this scope
   22 |     cout<<fixed<<setprecision(20)<<ans<<endl;
      |                  ^~~~~~~~~~~~
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:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

#include <iostream>
#include <cmath>
#define PI 3.14159265359
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 <iostream>
#include <stdio.h>
#include <vector>
#include <algorithm>
#include <cmath>
#define rep(i,cc,n) for(int i=cc;i<=n;++i)
#define drep(i,cc,n) for(int i=cc;i>=n;--i)
typedef long long ll;
using namespace std;

int main(){
    const double PI=3.14159265358979323846;
    int r;
    cin>>r;
    double ans = 0;
    ans = PI*(double)r*2.0;
    printf("%.14f\n",ans);
    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 pair<int, int> P;
#define rep(i, n) for (ll i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define m1(x) memset(x,-1,sizeof(x))
const int INF = 1e9;
const int MOD = 1e9 + 7;
const double PI = 3.141592653589;
double ans;

int main(){
  double a, b, c;
  string s, t;
  cin >> a;
  printf("%lf\n", a * 2 * PI);
}



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 <sstream>
#include <stdio.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include <set>
#include <string>
#include <vector>
#include <map>
#include <algorithm>
#include <cmath>
#include <limits>
#include <bitset>
#include <stack>
#include <queue>
#include <ctype.h>

typedef long long int lli;
#define rep(i,s,N) for(int i=s;i<N;i++)
#define MOD 1000000007
#define more(a,b) (((a)>(b))?(a):(b))
#define less(a,b) (((a)<(b))?(a):(b))

using namespace std;

int main(void)
{
	int R; cin >> R;
	double ans = M_PI * (double)R * 2.;
	printf("%.4lf\n", ans);

	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;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const ll INF = 1e18;
const double pi = 3.14159265358979323846;
#define rep(i,n) for(int i=0;i<n;i++)

int main(){
	double r;cin>>r;
	cout<<fixed<<setprecision(10)<<2.0*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

using namespace std;

int main() {
	int r;
	cin>>r;
	double cir = 6.28318530717958623200*r;
	cout<<cir;
	return 0;
}

Compiler output:
main.c:1:1: error: unknown type name 'using'
    1 | using namespace std;
      | ^~~~~
main.c:1:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    1 | using namespace std;
      |                 ^~~
main.c: In function 'main':
main.c:5:9: error: 'cin' undeclared (first use in this function)
    5 |         cin>>r;
      |         ^~~
main.c:5:9: note: each undeclared identifier is reported only once for each function it appears in
main.c:7:9: error: 'cout' undeclared (first use in this function)
    7 |         cout<<cir;
      |         ^~~~
Language: C++


#include<bits/stdc++.h>
typedef long long ll;
typedef double ld;

void solve(){
    ll n;
    cin>>n;
    ld pie=6.28318530717958623200;
    pie/=2;
    pie*=2;
    cout<<setprecision(10)<<fixed<<pie<<endl;
    
    
    
    }
    
int main(){
    int t=1;
    // cin>>t;
    while(t--){
        solve();
    }
return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:8:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |     cin>>n;
      |     ^~~
      |     std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:2:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:12:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |     cout<<setprecision(10)<<fixed<<pie<<endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:12:11: error: 'setprecision' was not declared in this scope; did you mean 'std::setprecision'?
   12 |     cout<<setprecision(10)<<fixed<<pie<<endl;
      |           ^~~~~~~~~~~~
      |           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:12:29: error: 'fixed' was not declared in this scope
   12 |     cout<<setprecision(10)<<fixed<<pie<<endl;
      |                             ^~~~~
a.cc:12:29: 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:12:41: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |     cout<<setprecision(10)<<fixed<<pie<<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>
#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 << fixed << setprecision(8);
    cout << 2*r*M_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 MOD (long long)(1E9+7)
#define rep(i, n) for(int i = 0; i < n; i++)

using namespace std;


long long extgcd(long long a)
{
	long long b = MOD;
	long long u = 1, v = 0, q; 
	while ( b > 0 ) {
		q = a / b; 
		a -= q * b; swap(a,b);
		u -= q * v; swap(u,v);
	}
	u %= MOD;
	while (u<0)
		u+=MOD;
	return u;
}
long long comb(long long n,long long k)
{
	long long t = 1;
	long long j = k;
	for(long long i = n; i  >= n-k+1; i--) {
		t *= i;
		t %= MOD;
		t *= extgcd(j);
		t %= MOD;
		j--;
	}  
  	while (t<0)
		t += MOD;
	return t;
}

int main(){
	int n;
	cin >>n;
	prinft("%8.8lf\n", 2*3.14159*(long long)n);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:41:9: error: 'prinft' was not declared in this scope; did you mean 'printf'?
   41 |         prinft("%8.8lf\n", 2*3.14159*(long long)n);
      |         ^~~~~~
      |         printf
Language: C

#include <iostream>

using namespace std;
 
    
    
int main(){
  int r;
  float x;
  cin>>r;
  x=2*3.14159265358979*r;
  cout<<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

//#define _GLIBCXX_DEBUG
#include<bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
const long long INF= 1e+18+1;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vector<ll> >vvl;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> T;
const ll MOD=1000000007LL;
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int main(){
  ll r;cin>>r;
  cout<<2*r*PI<<endl;
}
  
  
    

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

from sys import stdin
import math

r = float(stdin.readline().rstrip())

print(2*3.1415*r)


Compiler output:
main.c:1:1: error: unknown type name 'from'
    1 | from sys import stdin
      | ^~~~
main.c:1:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'import'
    1 | from sys import stdin
      |          ^~~~~~
main.c:1:10: error: unknown type name 'import'
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 << 2*M_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<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const int mod=1000000007;
#define PI 3.1415926535
#define pb  push_back
#define FOR(i,n) for(int i=0;i<(n);i++)
#define FORA(i,a,b) for(int i=(a);i<=(b);i++)
#define FORD(i,a,b) for(int i=(a);i>=(b);i--)
#define FAST ios_base::sync_with_stdio(false);cin.tie(NULL);
#define count_1(n)  __builtin_popcountll(n)
#define parity(n)   __builtin_parityll(n)   //Even parity 0 as output
void show    (int a[], int arraysize) { for (int i = 0; i < arraysize; ++i)  {cout << a[i] << " ";}	cout<<endl;}
int gcd(int a, int b) { if (b == 0) return a; return gcd(b, a % b);}
void sieve(int n)
{
    bool prime[n+1];
    memset(prime, true, sizeof(prime));

    for (int p=2; p*p<=n; p++)
    {
        if (prime[p] == true)
        {
            for (int i=p*p; i<=n; i += p)
                prime[i] = false;
        }
    }
    for (int p=2; p<=n; p++)
       if (prime[p])
          cout << p << " ";
}
int main()
{FAST
double n;
cin>>n;
cout<< fixed << setprecision(5)<< 2*PI*n<<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(){
  int r;
  cin >> r;
  cout << 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 <bits/stdc++.h>
using namespace std;

int main() {
  double R;
  cin >> R;
  double ans;
  ans = 2*R*3.14159265;
    
    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>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    double r;
    cin >> r;
    double pi = atan(1) * 4;
    cerr << pi << endl;
    cout << setprecision(10) << 2 * pi * 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>
using namespace std;

int main() {
  int r;
  double pi = 3.1415926535;
  cin >> r;
  r *= 2;
  cout << fixed << setprecision(10);
  cout << 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>
using namespace std;
int main()
{
	int n;
	cin>>n;
	cout<<n*2*3.14;
	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>

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: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 int ll;
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#define  boost ios_base::sync_with_stdio(false);cin.tie(NULL);
#define ull unsigned long long
#define d1(x) cout<<#x<<" "<<x<<endl;
#define d2(x,y) cout<<#x<<" "<<x<<" "<<#y<<" "<<y<<endl;
#define d2i(x,y,i) cout<<#x<<i<<" "<<x<<" "<<#y<<i<<" "<<y<<endl;

#define fr(i,l,r) for(ll i=l;i<r;i++)
#define mems(a,x) memset(a,x,sizeof(a))
#define mod 1000000007
#define ff first
#define ss second
#define pb(x) push_back(x)
#define vll vector<ll>
#define pbp(x,y) push_back(make_pair(x,y))
#define  mat vector<vector<ll>>
#define pi 3.14159265358979323846
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void solve(){
  double r;
  cin>>r;
 cout<<fixed;
 cout<<setprecision(10)<<(double)2*pi*r<<endl;
}





int main(){
    ll t=1;
//cin>>t;
    while(t--){
     solve();
   cout<<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>
#include <vector> 
#include <set>
#include <map>
#include <math.h>

using namespace std;

#define loop(i,a,b) for(int i = a; i<b; i++)
#define square(a) (a)*(a)

typedef long long ll;
typedef string str;


int main ()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	int r;
	cin >> r;
	
	const long double pi = 3.141592653;
	cout << (long double)r * 2 * pi;
	
    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 << std::setprecision(23) << (double)r * 2 * 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() {
  int R;

  // 変数aで入力を受け取る
  cin >> R;

  cout << R*2*3.14159265 << 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 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 <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int r;
    cin >> r;
    cout << 2*3.14*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<bits/stdc++.h>
#define ll long long int
#define pb push_back
#define pob pop_back
#define vi vector<ll>
#define mp make_pair
#define sz size()
#define rep1(i,n) for(ll i=1;i<=n;i++)
#define rep(i,n) for(ll i=0;i<n;i++)
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define maxx 100005
#define edge pair<ll,ll>
#define mod 1000000007
using namespace std;
 
 
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int main(){

	fast;
	float n,a,b,c;
	string s,t;
	ll i,j,k;
	float pi=3.1415926535;
	cin>>n;
	cout<<2*pi*n<<endl;
	



	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

#include<bits/stdc++.h>
using namespace std;
int main()
{
	double a;
	cin>>a;
	cout<<2*3.14159*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 <bits/stdc++.h>
using namespace std;

int main() {
  int R;
  cin >> R;
 cout << R * 6.28 << 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 <algorithm>
#include <iostream>
#include <string>
using namespace std;
#define PI 3.14159265359
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main() {
  int R;
  cin >> R;
  double ans = 2 * PI * R;
  cout << ans << 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>
using namespace std;

int main(){
	int r;
	scanf("%d",&r);
	printf("%.12lf\n", 2*r*M_PI);
}


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

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;


public class A {
  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    PrintWriter out = new PrintWriter(System.out);
    int radius = Integer.parseInt(reader.readLine());
    out.println(2 * 3.14159 * radius );
    out.flush();
  }
}


Compiler output:
Main.java:7: error: class A is public, should be declared in a file named A.java
public class A {
       ^
1 error
Language: C

#include <iostream>
using namespace std;

int main(){
    double r;
    const double pi = 3.14;
    cin >> r;
    cout << 2* r * pi ;
    return 0;
}

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

using System;
using System.Collections.Generic;

namespace atcoder
{
    class Program
    {
        static void Main(string[] args)
        {
            string R1 = Console.ReadLine();
            long R = long.Parse(R1);
            Console.WriteLine(2 * 3.14 * R);
           
        }
    }
}

Compiler output:
main.c:1:1: error: unknown type name 'using'
    1 | using System;
      | ^~~~~
main.c:2:1: error: unknown type name 'using'
    2 | using System.Collections.Generic;
      | ^~~~~
main.c:2:13: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    2 | using System.Collections.Generic;
      |             ^
main.c:4:1: error: unknown type name 'namespace'
    4 | namespace atcoder
      | ^~~~~~~~~
main.c:5:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    5 | {
      | ^
Language: C

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


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

    double r;
    cin >> r;
    printf("%.10lf\n",2*M_PI*r);
    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

#include<bits/stdc++.h>
#define pii pair<int,int>
#define x first
#define y second
#define mp make_pair
#define pb push_back
#define ll long long
#define sz size()
#define ft front
#define pu push
#define ty empty
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
const int m5=100042;
int main(void)
{
	const float pie=3.1415926;
	float r;
	cin>>r;
	cout<<(r*2*pie);
	return 0;
    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

import java.util.Scanner;

public class ABC163_A {

	String fnc(int r) {
		return "" + Math.PI * 2 * r;
	}

	void run() {
		try (Scanner sc = new Scanner(System.in)) {
			//while (true) {
				int r = sc.nextInt();
				System.out.println(fnc(r));
			//}
		}
	}

	public static void main(String[] args) {
		new ABC163_A().run();
	}

}


Compiler output:
Main.java:3: error: class ABC163_A is public, should be declared in a file named ABC163_A.java
public class ABC163_A {
       ^
1 error
Language: C


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

#define vint vector<int> 
#define vbool vector<bool>
#define vvint vector<vector<int>>

#define rep(a, b, c) for(int (a)=(b); (a)<(c); (a)++)
#define all(a) (a).begin(), (a).end()

int main(){
    // ifstream in("input.txt");
    // cin.rdbuf(in.rdbuf());

    double r;
    cin >>r;
    cout << 2*r*3.1415;


}

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>
using namespace std;

int main(){
  double r;
  cin >> r;
  cout << fixed << setprecsion(7) << r*3.141592 << endl;
    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: 'setprecsion' was not declared in this scope
    7 |   cout << fixed << setprecsion(7) << r*3.141592 << endl;
      |                    ^~~~~~~~~~~