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

#include<bits/stdc++.h>
using namespace std;
#define ll long long double;
int main(){
  ll r;cin>>r
    ll p=(22*1.0)/7;
  ll ans=(2*p)*r;
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:22: error: declaration does not declare anything [-fpermissive]
    3 | #define ll long long double;
      |                      ^~~~~~
a.cc:5:3: note: in expansion of macro 'll'
    5 |   ll r;cin>>r
      |   ^~
a.cc:5:6: error: 'r' was not declared in this scope
    5 |   ll r;cin>>r
      |      ^
a.cc:6:8: error: 'p' was not declared in this scope
    6 |     ll p=(22*1.0)/7;
      |        ^
a.cc:3:22: error: declaration does not declare anything [-fpermissive]
    3 | #define ll long long double;
      |                      ^~~~~~
a.cc:7:3: note: in expansion of macro 'll'
    7 |   ll ans=(2*p)*r;
      |   ^~
a.cc:7:6: error: 'ans' was not declared in this scope; did you mean 'abs'?
    7 |   ll ans=(2*p)*r;
      |      ^~~
      |      abs
Language: C

#include <bits/stdc++.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: Java

impot java.uti.Scanner;
class A {
  public static void main(String args[]) {
	Scanner in = new Scanner(System.in);
    int r = in.nextInt();
    double ans;
    ans = Math.PI * r * r;
    System.out.println(ans);
  }
}

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
impot java.uti.Scanner;
^
1 error
Language: C

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using PII = pair<ll, ll>;
#define FOR(i, a, n) for(ll i=(ll)a; i<(ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()
template<typename T> void chmin(T &a, const T &b) { a = min(a, b); }
template<typename T> void chmax(T &a, const T &b) { a = max(a, b); }
struct FastIO {FastIO() { cin.tie(0); ios::sync_with_stdio(0); }}fastiofastio;
#ifdef DEBUG
#include "../program_contest_library/memo/dump.hpp"
#else
#define dump(...)
#endif
constexpr ll INF = 1LL<<60;

int main() {
    ll r;
    cin >> r;
    cout << fixed << setprecision(9) << 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 <string>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cmath>
#include <stack>
#include <queue>
#include <set>

#define mod 1000000007
#define mp make_pair
#define rep(i,n) for(int i=0;i<n;i++)
#define _GLIBCXX_DEBUG
#define _LIBCPP_DEBUG 0

using namespace std;
using ll = long long;
using pii = pair<int, int>;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n;
    cin >> n;
    cout << 2 * n * M_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<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<algorithm>

const long long mod = 1e9+7;

long long bin(long long n, long long p)
{
  long long r =1;
  for(int i = p+1; i <= n; i++)
  {
    r *= i;
  	r %= mod;
  }
  
  for(int i = 1; i <= n-p; i++)
    r /= i;
  
  return r;
}

long long fastPow(long long base, long long exp)
{
  long long ans = 1;
  while(exp)
  {
    if(exp & 1)
      ans *= base;
    
    ans %= mod;
    exp = exp >> 1;
    base = (base*base)%mod;
  }
  
  return ans;
}

int main()
{
  long long n,k;
  cin >> n >> k;
  long long  total = fastPow(2,n+1);
  total -= max(n-2,0)*max(n-2,0);
  long long r = bin(n+1,k);
  r -= max(min(k,n)-2,0)*max(n-2,0);
  cout << total - r << enld;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   42 |   cin >> n >> k;
      |   ^~~
      |   std::cin
In file included from a.cc:3:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:44:12: error: 'max' was not declared in this scope; did you mean 'std::max'?
   44 |   total -= max(n-2,0)*max(n-2,0);
      |            ^~~
      |            std::max
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:4:
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: 'std::max' declared here
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:46:12: error: 'min' was not declared in this scope; did you mean 'std::min'?
   46 |   r -= max(min(k,n)-2,0)*max(n-2,0);
      |            ^~~
      |            std::min
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: 'std::min' declared here
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:47:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   47 |   cout << total - r << enld;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:47:24: error: 'enld' was not declared in this scope
   47 |   cout << total - r << enld;
      |                        ^~~~
Language: C


#include <cmath>
#include <limits>
#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#include <cstring>
#include <set>
#include <map>
#include <queue>
#include <stack>
#define rep(i, s, g) for (i = s; i < g; i++)
using namespace std;
using ll = long long;
const int inf = 1000000000; //10^9
const  double PI = 3.1415926535897932;

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

    cout << ans << endl;
}

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

#include <cstdio>
#include <cmath>
#include <limits>
#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#include <cstring>
#include <set>
#include <map>
#include <queue>
#include <stack>
#define rep(i, s, g) for (i = s; i < g; i++)
using namespace std;
using ll = long long;
const int inf = 1000000000; //10^9
const  double PI = 3.1415926535897932;

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

    cout << ans << endl;
}

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

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


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

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

using namespace std;

int main()
{
  int r;
  cin << r;
  
  cout << 3.1415*r*2 << enld;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'cin' was not declared in this scope
    9 |   cin << r;
      |   ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<stdlib.h>
  +++ |+#include <iostream>
    3 | 
a.cc:11:3: error: 'cout' was not declared in this scope
   11 |   cout << 3.1415*r*2 << enld;
      |   ^~~~
a.cc:11:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:11:25: error: 'enld' was not declared in this scope
   11 |   cout << 3.1415*r*2 << enld;
      |                         ^~~~
Language: C++

#include<stdio.h>

using namespace std;

int main()
{
  int r;
  cin << r;
  
  cout << 3.1415*r*2 << enld;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'cin' was not declared in this scope
    8 |   cin << r;
      |   ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include<stdio.h>
  +++ |+#include <iostream>
    2 | 
a.cc:10:3: error: 'cout' was not declared in this scope
   10 |   cout << 3.1415*r*2 << enld;
      |   ^~~~
a.cc:10:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:25: error: 'enld' was not declared in this scope
   10 |   cout << 3.1415*r*2 << enld;
      |                         ^~~~
Language: C++

#include<bits/stdc++.h>

using namespace std;

int main()
{
  int r;
  cin >> r;
  cout << 3.1415*r*2 << enld;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:25: error: 'enld' was not declared in this scope
    9 |   cout << 3.1415*r*2 << enld;
      |                         ^~~~
Language: C

#include<bits/stdc++.h>
#define pf printf
#define sc(x) scanf("%d",&x);
#define scs(x) scanf("%s",x);
#define scl(x) scanf("%lld",&x);
#define rep(i,s,e) for(int i=s; i<=e; ++i)
#define dep(i,s,e) for(int i=s; i>=e; --i)
typedef long long ll;
using namespace std;
const ll mod=998244353;
const double pi=acos(-1); 
int main()
{
	int r;
	sc(r);
	double cou=2.0*r*pi;
	pf("%0.30lf\n",cou);
}


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 math

r = float(input())

print(math.pi * r * 2 )

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:3:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'r'
    3 | r = float(input())
      | ^
Language: C

#define _USE_MATH_DEFINES
#include <iostream>
#include <string>
#include <iomanip>
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
    int n;
    cin>>n;
    cout<<3.1415*2*n<<endl;
    return 0;
}

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

#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <stack>
#include <math.h>
#include <map>
#include <time.h>
#include <iomanip>
#include <bitset>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> P;

#define pb push_back
#define rep(i, a, n) for(int i = (a); i < (n); i++)
#define dep(i, a, n) for(int i = (a); i >= (n); i--)
#define mod (ll)(1e9+7)
#define int ll

__attribute__((constructor))
void initial() {
  cin.tie(0);
  ios::sync_with_stdio(false);
}

signed main() {
    int r;
    cin >> r:
    cout << r * 3.14 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:13: error: found ':' in nested-name-specifier, expected '::'
   32 |     cin >> r:
      |             ^
      |             ::
a.cc:32:12: error: 'r' is not a class, namespace, or enumeration
   32 |     cin >> r:
      |            ^
Language: C

#include <bits/stdc++.h>
using namespace std;
 
int main() {
double r;
  cin>>r;
cout<<2*r*3.141592653<<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;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main(){
    int R;
    cin >> R;
    cout << R * 3.14 << endl;
}

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


public class Main {

    public static void main(String[] args) {
	// write your code here


        int R;
      



        double L;
        L=R*2*3.14;
        System.out.println(L);




    }
}


Compiler output:
Main.java:14: error: variable R might not have been initialized
        L=R*2*3.14;
          ^
1 error
Language: Java


public class Main {

    public static void main(String[] args) {
	// write your code here


        int R;
        






        double L;
        L=R*2*3.14;
        System.out.println(L);




    }
}


Compiler output:
Main.java:17: error: variable R might not have been initialized
        L=R*2*3.14;
          ^
1 error
Language: C

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

int main() {
    double n;
    cin >> n;
  cout << 6.283185307179586232 * n << 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 <math.h>
using namespace std;

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

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int x;
    cin >> x;
    cout << 2 * x * 3.1415;

    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;
  
  double pi=acos(-1);
  
  double ans=2*pi*r;
  
  cout << ans <<endl;
}

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

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

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

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

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

int main(){
  int r;
  cin >> r;
  
  cout << 3.1415926535 * 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 <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <string>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <iomanip>
#include <utility>
#include <tuple>
#include <functional>
#include <bitset>
#include <cassert>
#include <complex>
#include <stdio.h>
#include <time.h>
#include <numeric>
#define all(a) a.begin(),a.end()
#define rep(i, n) for (ll i = 0; i < (n); i++)
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
typedef long double ld;
typedef complex<ld> com;
constexpr int inf = 1000000000;
constexpr ll INF = 1000000000000000000;
constexpr ld EPS = 1e-12;
constexpr ld PI = 3.141592653589793238;
template<class T, class U> inline bool chmax(T &a, const U &b) { if (a < b) { a = b; return true; } return false; }
template<class T, class U> inline bool chmin(T &a, const U &b) { if (a > b) { a = b; return true; } return false; }


signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed << setprecision(20);
	
	double r;
	cin >> r;
	cout << r * 6.283185307 << '\n';
}

Compiler output:
main.c:1:10: 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()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    double pi = M_PI;
    int r;
    cin >> r;

    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 <bits/stdc++.h>
#include <iostream>
#include <math.h>

using namespace std;

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

    double pi = M_PI;
    int r;
    cin >> r;

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

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

#include <bits/stdc++.h>
using namespace std;
#define pii pair <int, int>
#define ll long long
#define pdd pair <double, double>
#define pll pair <ll, ll>
#define pb push_back
#define vi vector <int>
#define vvi vector <vi>
#define PI 3.14159
int main(){
    ios::sync_with_stdio(0);cin.tie(nullptr);
    double a;
    cin>>a;
    cout<<fixed<<setprecision(3)<<(PI*2*a)<<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 <math.h>

using namespace std;

int main() {
    double r;
    cin >> r;
    
    cout << 2*M_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

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


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

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

template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}

#define IOS ios::sync_with_stdio(false), cin.tie(nullptr)
#define FOR(i, a, b) for (int i = (a); i < (int)(b); i++)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(a) (a).begin(), (a).end()
#define allg(a) (a).begin(), (a).end(), greater<int>()
#define MAX(a) *max_element(all(a))

using ll = long long;
using vi = vector<int>;
using vll = vector<ll>;
using vvi = vector<vi>;
using vc = vector<char>;
using vs = vector<string>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using Graph = vvi;

const int INF = 1001001001;
const int MOD = 1000000007;
const long long INFL = (1LL << 60);
const double EPS = 1e-9;

const int MAX_N = 110;
const int MAX_V = 100010;

int N;
ll W, weight[MAX_N], value[MAX_N];
ll dp[MAX_N][MAX_V];

int main() {
  IOS;
  constexpr char endl = '\n';

  int R;
  cin >> R;
  cout << 2.0 * 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;
#define pb			push_back
#define vi  		vector<int>
#define all(a)		(a).begin(),(a).end()
#define F 			first
#define S 			second
#define endl		"\n"
#define fast 		ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define int 		long long int
#define mod			1000000007

static int t[3][4001];
int32_t main(){


	int r;
	cin>>r;
	float ans=2*3.141592*r;
	printf("%.2f",ans);
	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(){
    ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int r;
	cin >> r;
	cout << 2*r*6.283185307/2
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:34: error: expected ';' before 'return'
    9 |         cout << 2*r*6.283185307/2
      |                                  ^
      |                                  ;
   10 |         return 0;
      |         ~~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
#define INF 1e9
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int, int> pii;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}
const int MOD = 1000000007;

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

  cout << r * 2 * 3.14 << endl;
}

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

#include<bits/stdc++.h>
using namespace std;
int main()
{
int t;cin>>t;
  while(t--)
{

int r;cin>>r;
cout<<2*3.14*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;
#define INF 1e9
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define ALL(x) (x).begin(), (x).end()
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int, int> pii;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}
const int MOD = 1000000007;

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

  cout << r * 2 * 3.14 << endl;
}

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

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;
using ll = long long;

#define     _test int _TC; cin >> _TC; while(_TC--)
#define     CS(x) cout << "Case " << x << ": ";
#define     precision(n) cout << fixed << setprecision(n);
#define     Clear(a, b) memset(a, b, sizeof(a))
#define     sq(x) ((x) * 1LL * (x))
#define     eb emplace_back
#define     all(_n) _n.begin(), _n.end()
#define     rall(_n) _n.rbegin(), _n.rend()
#define     endl "\n"
#define     show(x) cout << x << endl
#define     nl cout << endl
#define     sz(x) int(x.size())
#define     gcd(a, b) __gcd(a, b)
#define     lcm(a, b) (abs((a) * (b)) / gcd(a, b))
#define     parity(a, b) ((a&1) ^ (b&1))
#define     make_unique(x) sort(all((x))); (x).erase(unique(all((x))), (x).end())
#define     IN(a) for(auto &it : a) cin >> it

template <typename T> void print (T t){ for(const auto &it : t) cout << it << ' '; nl; }
template <typename T> using OS = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; // order_of_key find_by_order

const    double Pi = acos(-1.0);
const    int Mod = 1e9 + 7;
const    int Inf = 1 << 30; // INT_MAX = (1LL << 31) -1 // Inf -> 1e9
const    int Maxx = 1e6 + 10;

/************************************[Code Starts Here]************************************/


void _case()
{
	int n; cin >> n;
	precision(2)
	show(2*Pi*n);
}

int32_t main()
{
    ios::sync_with_stdio(false), cin.tie(nullptr);
    _case();
    return 0;
}




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

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

int main(void) {
    int R = 0;
    scanf_s("%d", &R);
    printf("%f", 2 * 3.1415 * R);
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:6:5: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    6 |     scanf_s("%d", &R);
      |     ^~~~~~~
      |     scanf
Language: C

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

template<typename T, typename U> bool chmin(T &a, const U &b) {
	return (a > b ? a = b, true : false);
}
template<typename T, typename U> bool chmax(T &a, const U &b) {
	return (a < b ? a = b, true : false);
}
const long long INF = 1000000000;

typedef long long ll;

#define writeln(n) cout<<n<<"\n";

typedef pair<int, int> P;
typedef pair<string, int> Psi;



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

	double d;cin>>d;

	printf("%0.10lf",2*d*3.141592653589793238462643383279502884197169399375105820974944);
}




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;
using ll = long long;
const double PI = atan(1)*4;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    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 <bits/stdc++.h>
 
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define endl "\n"
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define rrep(i, n) for(int i = ((int)(n)-1); i >= 0; i--)
#define all(x) (x).begin(), (x).end()
#define fill(x, y) memset(x, y, sizeof(x))
 
using namespace std;
 
template<class T>bool chmax(T &a, const T &b) { if(a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if(b<a) { a=b; return 1; } return 0; }
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> P;
 
const int INF = 1e9;
const int MOD = 1e9+7;
const double EPS = 1.0e-12;
const double PI = acos(-1.0);

int main() {
    double r;
    cin >> r;
    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>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

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

int main(){
    int R;
    cin>>R;
    cout<<2*R*M_PI<<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: Java

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


public class Bit {

    public static void main(String[] args) throws IOException {
        BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
        int r= Integer.parseInt(reader.readLine());
        System.out.println(2*Math.acos(-1)*r);
    }

}


Compiler output:
Main.java:6: error: class Bit is public, should be declared in a file named Bit.java
public class Bit {
       ^
1 error
Language: C

/*Whose woods these are I think I know.
His house is in the village though;
He will not see me stopping here
To watch his woods fill up with snow.
 
My little horse must think it queer
To stop without a farmhouse near
Between the woods and frozen lake
The darkest evening of the year.
 
He gives his harness bells a shake
To ask if there is some mistake.
The only other sound’s the sweep
Of easy wind and downy flake.
 
The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep.*/
 
#include<bits/stdc++.h>
using namespace std;
#define lli long long int
#define pb push_back
#define fi first
#define se second
#define MOD 1000000007
const int maxn= 100010;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout<<setprecision(20);
    cout<<fixed;
    int r=0;
    cin>>r;
    cout<<(2.0*M_PI*r)<<endl;
}


Compiler output:
main.c:21:9: fatal error: bits/stdc++.h: No such file or directory
   21 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

//##MohK..
//21/04/2020....6.00...
//Ya Rab....
#include <iostream>
using namespace std;
using ll=long long;
using ld=long double;
int main(){
    ld a;
    cin>>a;
    cout<<fixed<<setprecision(2)<<2*a*3.141;

    return 0;
}


Compiler output:
main.c:4:10: fatal error: iostream: No such file or directory
    4 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

//##MohK..
//21/04/2020....6.00...
//Ya Rab....
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
int main(){
    ld a;
    cin>>a;
    cout<<fixed<<setprecision(2)<<2*a*3.141;

    return 0;
}


Compiler output:
main.c:4:10: fatal error: bits/stdc++.h: No such file or directory
    4 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <algorithm>
#include <bitset>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <functional>
#include <iostream>
#include <queue>
#include <set>
#include <map>
#include <unordered_map>
#include <stack>
#include <string>
#include <vector>
#include <iomanip>
 
using namespace std;
typedef long long ll;
using gra = vector<vector<ll>>;
using gram = vector<unordered_map<ll,ll>>;
 
typedef unsigned long long ull;
 
template <class T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; }
template <class T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; }
 
template <class T> T gcd(T a, T b) { return b ? gcd(b, a % b) : a; }
template <class T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
template <class T> T dup(T a, T b) { return (a + b - 1) / b; }
template <class T> T modpow(T x, T p, T m) { T a=1; while(p){ if(p%2)a =a*x%m; x = x+x%m; p/=2; } return a; }
// template <class T> void prim(T a) { for(ll i=0;i<a.size();++i) { cout << a[i]; } cout << "\n"; }
//template< typename T >
//T mod_pow(T x, T n, const T &p) {
//  T ret = 1;
//  while(n > 0) {
//    if(n & 1) (ret *= x) %= p;
//    (x *= x) %= p;
//    n >>= 1;
//  }
//  return ret;
//}
/////////////////// 
//

#define mod 1000000007LL
#define INF 10000000000000000LL
 
#define rep(i, n) for (ll i = 0; i < n; ++i)
#define rep1(i, n) for (ll i = 1; i <= n; ++i)
#define rrep(i, n) for (int i = (n - 1); i >= 0; --i)
#define rrep1(i, n) for (int i = n; i > 0; --i)
 
#define pri(x) cout << (x) << "\n"
#define pri2(x, y) cout << (x) << " " << (y) << "\n"
#define pri3(x, y, z) cout << (x) << " " << (y) << " " << (z) << "\n"
//#define modpow(x, p, m) { ll a=1; while(p){ if(p%2)a =a*x%m; x = x+x%m; p/=2; } return a; }
 
#define m0(h) memset(h, 0, sizeof(h))
#define m1(h) memset(h, 1, sizeof(h))
#define m(h, n) memset(h, (n), sizeof(h))
#define all(n) (n).begin(),(n).end()
#define bit(n) (1LL << (n))
#define pb push_back
#define mp make_pair
 
//#ifdef LOCAL
//
//#define dpri(...) fprintf(stderr, __VA_ARGS__)
//#define pria(g) rep(i,g.size()){ cout << i << "{"; rep(j,g[i].size()) cout << g[i][j] << " "; cout << "}" << "\n"; }
//#else
//#define dpri(...) 42
//#define pria(g) 42
//#endif
//
//
//

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  // ---------------------
  // コーディング開始
  // ---------------------
  float py = 6.283185307179586232/2.00;
  float a;
  cin >> a;
  a*=2.00000000000000000;
  cout << std::fixed << std::setprecision(15) << (a*py) << 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>
#define REP(i, n) for (int i = 0; i < n; i++)
#define REPR(i, n) for (int i = n; i >= 0; i--)
#define FOR(i, m, n) for (int i = m; i < n; i++)
#define FORR(i, m, n) for (int i = m; i >= n; i--)
#define SORT(v, n) sort(v, v + n);
#define VSORT(v) sort(v.begin(), v.end());
#define ll long long
#define ull unsigned long long
#define pb(a) push_back(a)
#define INF 100000000001
using namespace std;
typedef pair<int, int> P;
typedef pair<ll, ll> LP;
typedef pair<int, P> PP;
typedef pair<ll, LP> LPP;

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


int main()
{
    double r;
    cin >> r;
    cout << r * 2.0 * 3.14 << endl;
}


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

#include <bits/stdc++.h>
typedef long long int ll;
typedef long double ld;
using namespace std;
ll mod=1e18;
const ll inf = (ll)1e17;
const ld eps = 1e-12;
const ld PI = 3.14159265358979323846;
ll mul(ll a, ll b, ll m = mod) { return (ll)(a * b) % m;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
ll powmod(ll a,ll b){ll res=1;a%=mod;assert(b>=0);for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res%mod;}
long modInverse(long a) {return powmod(a, mod-2);}
ll my_rand(){ll a=rand();ll b=rand();return (a*RAND_MAX+1)+b;}
typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;

#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()


int main(){
    ios::sync_with_stdio(false);
    srand(chrono::steady_clock::now().time_since_epoch().count());
    cin.tie(0);
    cout.tie(0);
    cout.precision(20);
    int n;
    cin>>n;
    long double res=2*PI*n;
    cout<<res<<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(){
	float r;
  cin>>r;
  cout<<2*r*(3.141592)<<endl;
}

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

R = int(input())
ans = 2*3.14*R
print(ans)

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

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

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

    cout<<2*3.1416*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() {
	double pi = acos(-1);
	
	int r;
	scanf("%d", &r);
	printf("%.10lf\n", 2.*pi*r);
	
	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 be(v) (v).begin(),(v).end()
#define pb(q) push_back(q)
typedef long long ll;
using namespace std;
const ll mod=1000000007;
#define doublecout(a) cout<<fixed<<setprecision(10)<<a<<endl;

int main() {
    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(false);
    ll n;
    cin >> n;
    vector<pair<ll, ll> > a(n);
    for(int i=0;i<n;i++){
        cin >> a[i].first;
        a[i].second = -i;
    }
    sort(be(v));
    vector<vector<ll> > dp(n+1,vector<ll> (n+1,0));
    for (int i=0;i<n;i++)for (int j=0;j<n;j++){
        ll id = -a[i].second;
        dp[i+1][j] = max(dp[i][j]+a[i].first*(i-id+j), dp[i][j+1] + a[i].first*(id-j));
    }
    cout << dp[n][0] << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:13: error: 'v' was not declared in this scope
   20 |     sort(be(v));
      |             ^
a.cc:2:16: note: in definition of macro 'be'
    2 | #define be(v) (v).begin(),(v).end()
      |                ^
Language: Java

import java.util.Scanner;
class Main{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.println("R:");
    int R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);
    
  }
}

Compiler output:
Main.java:6: error: incompatible types: possible lossy conversion from double to int
    int R = s.nextDouble();
                        ^
1 error
Language: Java

import java.util.Scanner;
class Contesta{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.println"(R:");
    int R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);
    
  }
}

Compiler output:
Main.java:5: error: not a statement
    System.out.println"(R:");
              ^
Main.java:5: error: ';' expected
    System.out.println"(R:");
                      ^
2 errors
Language: Java

import java.util.*;
class Main{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.print("R:" );
    int R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);

  }
}


Compiler output:
Main.java:6: error: incompatible types: possible lossy conversion from double to int
    int R = s.nextDouble();
                        ^
1 error
Language: Java


class Main{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.print("R:" );
    int R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);

  }



Compiler output:
Main.java:11: error: reached end of file while parsing
  }
   ^
1 error
Language: Java

import java.util.Scanner;
class Main{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.print("R:" );
    int R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);

  }
}


Compiler output:
Main.java:6: error: incompatible types: possible lossy conversion from double to int
    int R = s.nextDouble();
                        ^
1 error
Language: C

import java.util.Scanner;
class Contesta{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.print("R:" );
    double R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);

  }
}


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:2:1: error: unknown type name 'class'
    2 | class Contesta{
      | ^~~~~
main.c:2:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    2 | class Contesta{
      |               ^
Language: C

public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.println(R:);
    double R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);
    
  }

Compiler output:
main.c:1:7: error: expected ';' before 'static'
    1 | public static void main(String[] args) {
      |       ^~~~~~~
      |       ;
main.c:1:25: error: unknown type name 'String'
    1 | public static void main(String[] args) {
      |                         ^~~~~~
Language: C

import java.util.Scanner;
class Contesta{
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.println(R:);
    double R = s.nextDouble();
    double pai = 3.141592;
    double L = 2*pai*R;
    System.out.println(L);
    
  }
}

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:2:1: error: unknown type name 'class'
    2 | class Contesta{
      | ^~~~~
main.c:2:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    2 | class Contesta{
      |               ^
Language: C

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

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

const double pi = 3.1415926;

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

    int n;
    cin >> n;
    cout << setprecision(10) << fixed << pi * 2 * n << endl;
    
    return 0;
}


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

#include<stdio.h>

int main(){
  int R;
  double ensyuu;
  scanf("%d",&R);
  print("%f",ensyuu);
  
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:3: error: implicit declaration of function 'print'; did you mean 'printf'? [-Wimplicit-function-declaration]
    7 |   print("%f",ensyuu);
      |   ^~~~~
      |   printf
Language: C

#include<stdio.h>

int main(){
  int R;
  double ensyuu;
  scanf("%d,&R);
  ensyuu=R*2*3.14;
  printf("%f",ensyuu);
        
        return 0
        }

Compiler output:
main.c: In function 'main':
main.c:6:9: warning: missing terminating " character
    6 |   scanf("%d,&R);
      |         ^
main.c:6:9: error: missing terminating " character
    6 |   scanf("%d,&R);
      |         ^~~~~~~~
main.c:7:18: error: expected ')' before ';' token
    7 |   ensyuu=R*2*3.14;
      |                  ^
      |                  )
main.c:6:8: note: to match this '('
    6 |   scanf("%d,&R);
      |        ^
main.c:7:9: error: incompatible type for argument 1 of 'scanf'
    7 |   ensyuu=R*2*3.14;
      |   ~~~~~~^~~~~~~~~
      |         |
      |         double
In file included from main.c:1:
/usr/include/stdio.h:428:42: note: expected 'const char *' but argument is of type 'double'
  428 | extern int scanf (const char *__restrict __format, ...) __wur;
      |                   ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
main.c:10:17: error: expected ';' before '}' token
   10 |         return 0
      |                 ^
      |                 ;
   11 |         }
      |         ~
Language: C

#include<stdio.h>

int main(void){
  int R;
  double ensyuu;
  ensyuu=R*2*3.14;
  printf("%f",ensyuu);
  
    return 0;
  {

Compiler output:
main.c: In function 'main':
main.c:10:3: error: expected declaration or statement at end of input
   10 |   {
      |   ^
main.c:10:3: error: expected declaration or statement at end of input
Language: C

#include<stdio.h>
int main(void){
  float R;
  printf("%d\n",R*2*3.14);
  return 0;
  {

Compiler output:
main.c: In function 'main':
main.c:6:3: error: expected declaration or statement at end of input
    6 |   {
      |   ^
main.c:6:3: error: expected declaration or statement at end of input
Language: C

#include <bits/stdc++.h>

int main()
{
  int R;
    cin >>R;
  cout << M_PAI*R*2;
}


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<iostream>

using namespace;
int main()
{
  int R;
    cin >>R;
  cout << M_PAI*R*2;
}

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 <vector>
#include<algorithm>
#include<iomanip>
#include<math.h>
using namespace std;



int main()
{

	double  N, m;

	cin >> N;

	m = 3.14 * N * 2;

	cout << m;


}

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

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

int r;

int main(){
	cin >> r;
	double res = r * M_PI
	cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: expected ',' or ';' before 'cout'
   10 |         cout << res << endl;
      |         ^~~~
Language: C

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

#define rep(i,n) for (int i = 0; i< (n); ++i)
#define vvec(m,n) vector<vector<int>> (int(m), vector<int>(n))
#define ALL(a) (a).begin(), (a).end()
#define PI 3.14159265359

using ll = long long;

int main(){
    int r;
    cin >> r;
    cout <<  r * 2 * PI << 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 rep(i,n) for (int i = 0; i< (n); ++i)
#define vvec(m,n) vector<vector<int>> (int(m), vector<int>(n))
#define ALL(a) (a).begin(), (a).end()
#define PI 3.14159265359

using ll = long long;

int main(){
    int r;
    cin >> r;
    cout << r * 2 * PI << 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;
 cout<<2*3.1415*r;
 return  0;
}

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

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

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


Compiler output:
a.cc:2:9: fatal error: math: No such file or directory
    2 | #include<math>
      |         ^~~~~~
compilation terminated.
Language: C

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

int main() {
    const double pi = atan(1)*4;
    int R;
    cin >> R;
    cout << 2*R*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<iostream>
#include<cmath>
using namespace std;
int main(){
  int r;
  cin>>r;
  float ans=r*2*M_PI;
  cout<<ans<<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>
#define _GLIBCXX_DEBUG
using namespace std;
#define REP(i,m,n) for(int i=(int)(m) ; i < (int) (n) ; ++i )
#define rep(i,n) REP(i,0,n)
#define square(x) pow(x 2.0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
#define max_queue(x) priority_queue<x>
#define min_queue(x) priority_queue<x, vector<x>, greater<x>>
#define big_sort(v) sort(all(v), [](long a, long b) { return a > b; })//大きい順にソート
using ll = long long;
using vi = vector<long>;
using vvi = vector<vi>;
using vs = vector<string>;
// aよりもbが大きいならばaをbで更新する
// (更新されたならばtrueを返す)
template <typename T>
bool chmax(T &a, const T& b) {
  if (a < b) {
    a = b;  // aをbで更新
    return true;
  }
  return false;
}
// aよりもbが小さいならばaをbで更新する
// (更新されたならばtrueを返す)
template <typename T>
bool chmin(T &a, const T& b) {
  if (a > b) {
    a = b;  // aをbで更新
    return true;
  }
  return false;
}
/*
#include <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
*/
int main() {
  char r;
  cin >> r;
  cout << r*3.141592 << 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 ll = long long;
using namespace std;
ll GCD(ll a, ll b){ return a ? GCD(b % a, a) : b; }
int main(){
    double r;
    cin>>r;
    cout<<fixed<<setprecision(10)<<(double)2.0*r*3.141592<<endl;
}

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