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

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define inf 1e18
#define IOS ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define pb push_back
#define ff first
#define ss second
#define vll vector<ll>
#define pii pair<ll,ll>
#define sz(v) (v).size()
#define srt(v) sort(v.begin(),v.end())
#define ull unsigned long long
#define tell(a) cout<<a<<" "
#define el cout<<endl
#define rev(v) reverse(v.begin(),v.end())
#define rep(i,a,n) for(int i=a;i<n;i++)
#define M 1000000007
ll power(ll x, ll y, ll p){ll res = 1;x = x % p;while (y > 0){   if (y & 1)res = (res*x) % p;y = y>>1;
x = (x*x) % p;}return res;}



int main()
{
	IOS;
	double r;
	cin>>r;
	r=2*(M_PI)*r;
	cout<<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()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    double R;
    cin >> R;

    cout << R * 2 * acos(-1) << "\n";

    return 0;
}

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

#include<iostream>
#include<algorithm>
#include<cstdio>
#include<string>
#include<cstring>
#include<numeric>
#include<vector>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<cmath>
using namespace std;
typedef long long ll;
typedef pair<int,int>PII;
typedef pair<ll,ll>PLL;
typedef long double ld;

//typedef acos(-1) PI;

#define PI acos(-1)

int main(){
	int n;
	cin>>n;
	ld ans=2*PI*n;
	printf("%.9Lf\n",ans);
	//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/std.c++>
using nammespace std;
int main() {
  double R;
  cin >> R;
  double E;
  E = R * 2 * 3.141592653589;
  cout << E << endl;
}

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

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

int main(){
  // 入力
  double R;
  cin >> R;
  double pi = 3.14159;
  
  double result = 2*pi*R;

  cout << result << 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<<22/7*2*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

import math

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


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

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

int main(){
  double r,a;
  cin >> r;
  a=r*3.141592
  
  cout << fixed << setprecision(7) << a << endl;
  return 0;  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:15: error: expected ';' before 'cout'
    7 |   a=r*3.141592
      |               ^
      |               ;
    8 | 
    9 |   cout << fixed << setprecision(7) << a << endl;
      |   ~~~~
Language: C

import math
pi=math.pi
R=int(input())
print(pi*2*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 'pi'
    2 | pi=math.pi
      | ^~
Language: C

#include <iostream>
#define PI 3.14159265359
using namespace std;

int main(){
  int s;
  double ans;
  cin>>s;
  ans=(double)s*2.0000*PI;
  cout<<ans<<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<iomanip>
using namespace std;

int main() {
	int R;
	const double PI = 3.14159;
	cin >> R;

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


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

＃include<stdio.h>
  
  int main(void)
{
  int r;
  scanf("%d", &r);
  printf("%lf", 2 * 3.1415 * r);
  return 0;
}

Compiler output:
main.c:1:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | ＃include<stdio.h>
      |          ^
Language: C

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

// Remove GCC optimizer for codechef
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

using namespace std;
using namespace __gnu_pbds;

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define pb push_back
#define endl "\n"
#define int long long
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>

const int INF = 3e18 + 8;
const double PI = acos(-1);
const int N = 1e6 + 7;
int mod = 1e9;

const int maxn = 1e5 + 7;

int32_t main()
{
    IOS;
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);

    int r;
    cin >> r;
    double ans = 2 * PI * r;
    cout << setprecision(10) << fixed;
    cout << 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 <bits/stdc++.h>
using namespace std;
#define fo(i,n) for(int i = 0; i < n; i++)
#define pb push_back
#define all(c) c.begin(),c.end()
 
 
int main()
{
 
    int r;
    cin >> r;
    cout << 3.14159 * 2 *r;
 
 
 
 
    return 0;
}

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

#include<bits/stdc++.h>
using namespace std;
#define pi 3.141592654
int main()
{
    int r;
    cin >> r;

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

    return 0;
}


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

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <sstream> //C++
#include <queue> //C++
#include <string> //C++
#include <iostream> //C++
#include <vector> //C++
#include <algorithm> //C++
using namespace std; //C++
#define rep(i, a, n) for (i = (a); i < (n); i++)

//scanf("%d",&x);
//printf("%d",x);
//for(i=0;i<N;i++){  }
//if( == ){  }else{  }
//while( ){  }

/*
int N, i;
int H[100];
scanf("%d", &N);
for (i = 0; i < N; i++) scanf("%s", &H[i]);
*/




int main()
{
	int r;

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

}




Compiler output:
main.c:6:10: fatal error: sstream: No such file or directory
    6 | #include <sstream> //C++
      |          ^~~~~~~~~
compilation terminated.
Language: C

#include<iostream>
#include<cmath>
#include<algorithm>
#include <iomanip> 
#include<vector>
#define fo(i,n) for(ll i=0;i<n;i++)
#define f(i,n) for(ll i=1;i<n;i++)
#define ff(i,k,n) for(ll i=k,i<n;i++)
#define ll long long
/*Elegizip, elegizip otken sol bir shaktar-ai
 Elendeter zamanymnyn otip bara zhatkanny-ai
Umytylmas-Umytylmas Kairan esil shaktar-ai
Zamanymnyn kolyn bulgap otip bara jatkany-ai
 kairan esil , kairan esil shaktar-ai
kolyn bulgap zamanymnyn otip bara jatkany-ai;*/
using namespace std;

int main()
{ios::sync_with_stdio(0);
double n, r=0;
cin>>n;
cout<<2*3.14*n;

}





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

#include<algorithm>
#include<cmath>
#include<cstdio>
#include<functional>
#include<iomanip>
#include<iostream>
#include<numeric>
#include<math.h>
#include<map>
#include<queue>
#include<set>
#include<string>
#include<utility>
#include<vector>
// 追加１
#include <fstream>



using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
const ll mod = 1000000007;
#define rep(i,n) for(int i=0;i<n;i++)
#define repl(i,s,e) for(int i=s;i<e;i++)
#define reple(i,s,e) for(int i=s;i<=e;i++)
#define revrep(i,n) for(int i=n-1;i>=0;i--)
#define all(x) (x).begin(),(x).end()

const double PI = 3.14159265358979323846;

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

    cout << setprecision(10) << 2 * N * PI << endl;

    return 0;
}

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

#include <bits/stdc++.h>
#include <vector>
#include <string>
#include <stdio.h>
#include <cstdlib>
#include <iostream>
#include <cstdlib>
using namespace std;
using ll = long long;
#define mod 1000000007

int main()
{
    float r, circum;
	cin>>r;
	circum=2*3.141592653589793238462643383*r;
	printf("%.7f\n",circum);
    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: Java

class Main{
  public static void main(String[] args) throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        System.out.println(2 * Integer.parseInt(bf.readLine()) * Math.PI);
    }
}

Compiler output:
Main.java:2: error: cannot find symbol
  public static void main(String[] args) throws IOException {
                                                ^
  symbol:   class IOException
  location: class Main
Main.java:3: error: cannot find symbol
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        ^
  symbol:   class BufferedReader
  location: class Main
Main.java:3: error: cannot find symbol
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
                                ^
  symbol:   class BufferedReader
  location: class Main
Main.java:3: error: cannot find symbol
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
                                                   ^
  symbol:   class InputStreamReader
  location: class Main
4 errors
Language: C

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


int main() {

  double R;
  cin >> R;

cout << fixed << setprecision(20);  
cout << R*2*3.1415926 << endl;

}


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

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

int main() {
  int64_t N;
  cin >> N;
  cout << 2*pi*N << 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>
using namespace std;

int main() {
    double r;
    cin >> r;
    cout << std::fixed << std::setprecision(15) << 2 * M_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(void) {
  
  double R;
  cin >> R;
  double ans = 2 * 3.14159265359 * R;

  cout << setprecision(10) << 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;
 
#define FOR(i, l, r) for(size_t i = (l); i < (r); i = i + 1)
#define REP(i, n) FOR(i, 0, n)
const double PI=3.141592;

using ll = long long;
 
int main() {
    int 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;
const double PI = 3.141592653589793238460;

#define ll long long

int main(){

    ios::sync_with_stdio(false);
    cin.tie(0);
    
    int n;
    cin >> n;
    cout << setprecision(20) << 2*n*PI << "\n";

    return 0;
}

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

clude<bits/stdc++.h>
#define ll long long int
#define ld long double
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
using namespace std;
 
int main(){
    fast;
    ll n;
    cin >> n;
    ld ans = 2*n*3.14;
    cout << ans;
    return 0;
}
//                                     #!!{*[$um1t_Kum@r]*}!!#

Compiler output:
a.cc:1:1: error: 'clude' does not name a type
    1 | clude<bits/stdc++.h>
      | ^~~~~
a.cc: In function 'int main()':
a.cc:4:14: error: 'ios_base' has not been declared
    4 | #define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
      |              ^~~~~~~~
a.cc:8:5: note: in expansion of macro 'fast'
    8 |     fast;
      |     ^~~~
a.cc:4:48: error: 'cin' was not declared in this scope
    4 | #define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
      |                                                ^~~
a.cc:8:5: note: in expansion of macro 'fast'
    8 |     fast;
      |     ^~~~
a.cc:4:56: error: 'NULL' was not declared in this scope
    4 | #define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
      |                                                        ^~~~
a.cc:8:5: note: in expansion of macro 'fast'
    8 |     fast;
      |     ^~~~
a.cc:1:1: note: 'NULL' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
  +++ |+#include <cstddef>
    1 | clude<bits/stdc++.h>
a.cc:4:63: error: 'cout' was not declared in this scope
    4 | #define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
      |                                                               ^~~~
a.cc:8:5: note: in expansion of macro 'fast'
    8 |     fast;
      |     ^~~~
Language: C

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

int main() {
  double a;
  cin>>a;
  cout<<a*3.1415926<<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<<2*π*R<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: '\U000003c0' was not declared in this scope
    7 |   cout<<2*π*R<<endl;
      |           ^
Language: C++

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

int main(){
  long long int r;
  long long double ans;
  cin >> r;
  ans = 2*r*M_PI;
  cout <<  ans;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: 'long long' specified with 'double'
    6 |   long long double ans;
      |        ^~~~
Language: C

#include <map>
#include <set>
#include <cmath>
#include <cstdio>
#include <vector>
#include <sstream>
#include <iostream>
#include <algorithm>
#define endl '\n'
#define all(var) var.begin(), var.end()
#define input freopen("input", "r", stdin)
#define output freopen("output", "w", stdout)
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
int const MOD = 1e9+7;
typedef long long ll;
using namespace std;
 
int main(){
    double pi = acos(-1.0);
    double r; cin >> r;
    printf("%.20lf\n", 2*pi*r);
}


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

#include<bits/stdc++.h>

#define ll long long int
#define ld long double
#define pb push_back
#define eb emplace_back
#define xx first
#define yy second
#define INF 0x3f3f3f3f // 100'000'000'000'000
#define all(x) x.begin(),x.end()
#define show(x) cerr<<#x<<" : "<<x<<'\n';
#define yogeshk972() cerr<<"\nTime Taken : "<<(float)(clock()-time_p)/CLOCKS_PER_SEC<<"\n";
clock_t time_p=clock();

using namespace std;
const int N= 1e5+10, mod=1e9+7;

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

    double r;
    cin>>r;
    cout<<fixed<<setprecision(10)<<(2*acos(-1)*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>
using namespace std;
int main(){
int r;
cin>>r;
cout<<(2.0)*(3.14)*(r);
}

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:5:1: error: 'cin' was not declared in this scope
    5 | cin>>r;
      | ^~~
a.cc:6:1: error: 'cout' was not declared in this scope
    6 | cout<<(2.0)*(3.14)*(r);
      | ^~~~
Language: C

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

int main() {
 int R;
 cin >> R;
 const double PI=3.141592653589;
 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

#!/usr/bin/env python3
# vim: set fileencoding=utf-8

# pylint: disable=unused-import, invalid-name, missing-docstring, bad-continuation


"""Module docstring
"""

import math
import sys


def solve(values, nb, max_jump_size):
    max_jump_size = min(nb, max_jump_size)
    cost_to = [0]
    for i in range(1, nb):
        j = max(0, i - max_jump_size)
        value_i = values[i]
        new_cost = min(
            prev_cost + abs(value_i - prev_value)
            for prev_cost, prev_value in zip(cost_to[j:i], values[j:i])
        )
        cost_to.append(new_cost)
    return new_cost


def do_job():
    "Do the work"
    # first line is number of test cases
    R = int(input().strip())
    result = 2 * math.pi * R
    print(result)


def print_output(testcase, result) -> None:
    "Formats and print result"
    if result is None:
        result = "IMPOSSIBLE"
    print("Case #{}: {:f}".format(testcase + 1, result))


def main(argv=None):
    "Program wrapper."
    if argv is None:
        argv = sys.argv[1:]
    do_job()
    return 0


if __name__ == "__main__":
    import doctest

    doctest.testmod()
    sys.exit(main())


Compiler output:
main.c:1:2: error: invalid preprocessing directive #!
    1 | #!/usr/bin/env python3
      |  ^
main.c:2:3: error: invalid preprocessing directive #vim
    2 | # vim: set fileencoding=utf-8
      |   ^~~
main.c:4:3: error: invalid preprocessing directive #pylint
    4 | # pylint: disable=unused-import, invalid-name, missing-docstring, bad-continuation
      |   ^~~~~~
main.c:7:1: error: expected identifier or '(' before string constant
    7 | """Module docstring
      | ^~
main.c:7:3: warning: missing terminating " character
    7 | """Module docstring
      |   ^
main.c:7:3: error: missing terminating " character
    7 | """Module docstring
      |   ^~~~~~~~~~~~~~~~~
main.c:8:3: warning: missing terminating " character
    8 | """
      |   ^
main.c:8:3: error: missing terminating " character
main.c:30:7: error: invalid preprocessing directive #first
   30 |     # first line is number of test cases
      |       ^~~~~
Language: C

#include <iostream>
#include <iostream>
#include <string>
#include <vector>
#include <stdio.h>
#include <cmath>
#include <algorithm>
#define _USE_MATH_DEFINES
#include <math.h>
using namespace std;


int main() {

	double R;
	cin >> R;
	cout << 2*R * M_PI << endl;



}

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

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

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

int main(){
    double R;
    cin>>R;
    double ans=2.0*R*3.141592;
    cout<< std::setprecision(3) <<ans<<endl;
    return 0;
}

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

#include<bits/stdc++.h>
using namespace std;
 
#define SPEED ios::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define read()          freopen("in.txt","r",stdin)
#define write()         freopen("out.txt","w",stdout)
#define sf(n)           scanf("%d",&n)
#define sfd(n)          scanf("%lf",&n)
#define sl(x)           scanf("%I64d",&x)
#define sfl(n)          scanf("%lld", &n)
#define sfc(n)          scanf(" %c",&n)
#define sful(n)         scanf("%llu",&n)
#define ull             unsigned long long
#define endll           pf("\n")
#define pf              printf
#define PI              acos(-1.0)
#define eps             1e-12
#define mem(a,b)        memset(a,b,sizeof(a))
#define pb              push_back
#define xx              first
#define yy              second
#define pii             pair<int, int>
#define pll             pair<ll, ll>
#define MP make_pair
#define ll              long long
#define uniq(a)      a.erase(unique(a.begin(), a.end()), a.end())
#define cnd tree[idx]
#define lnd tree[idx<<1]
#define rnd tree[(idx<<1)+1]
#define lndp (idx<<1),(b),((b+e)>>1)
#define rndp ((idx<<1)+1),(((b+e)>>1)+1),(e)
#define inf 1999999999
#define MX 100005
#define MOD  1000000000
#define mod1 1000000009
#define var    int i,j,c=0,t,l,r,mid,z=0,k,x,y
 
//int dx[8]={0,0,1,1,-1,-1,1,-1};  //8 direction
//int dy[8]={1,-1,1,-1,1,-1,0,0};
//int dx[4]={1,-1,0,0};  //4 direction
//int dy[4]={0,0,1,-1};
ll n,m,a[200005];
 
int main()
{
    ll var;
    double d;
  
    sfd(d);
    d=2*PI*d;
    pf("%.7f\n",d);
}

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++

//
//  main.cpp
//  atcoder
//
//  Created by Hisaki Kobayashi on 2020/04/14.
//  Copyright © 2020 Hisaki Kobayashi. All rights reserved.
//
 
#include <bits/stdc++.h>
#include <string>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <bitset>
typedef long long ll;
using namespace std;
 
int main(int argc, const char * argv[]) {
    
//    // input from txt （提出時にこの箇所は削除すること）
//    std::ifstream in("input.txt");
//    std::cin.rdbuf(in.rdbuf());
//
    
    double R;
    cin >> R;
    
    cout << fixed << setprecision(20) << R*2.0*M_PI << endl;
 
    return 0;
}
//
//  main.cpp
//  atcoder
//
//  Created by Hisaki Kobayashi on 2020/04/14.
//  Copyright © 2020 Hisaki Kobayashi. All rights reserved.
//

#include <bits/stdc++.h>
#include <string>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <bitset>
typedef long long ll;
using namespace std;

int main(int argc, const char * argv[]) {
    
//    // input from txt （提出時にこの箇所は削除すること）
//    std::ifstream in("input.txt");
//    std::cin.rdbuf(in.rdbuf());
//
    
    double R;
    cin >> R;
    
    cout << fixed << setprecision(20) << R*2.0*M_PI << endl;
 
    return 0;
}
提出情報
提出日時

Compiler output:
a.cc:49:5: error: redefinition of 'int main(int, const char**)'
   49 | int main(int argc, const char * argv[]) {
      |     ^~~~
a.cc:18:5: note: 'int main(int, const char**)' previously defined here
   18 | int main(int argc, const char * argv[]) {
      |     ^~~~
a.cc:63:1: error: '\U000063d0\U000051fa\U000060c5\U00005831' does not name a type
   63 | 提出情報
      | ^~~~~~~~
Language: C

// for some reason i cant see problem stement

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

double x,y,z;

int main() {
	cin >> x;
	cout << 2*3.141592653589793238462643383279502884197169399*x << "\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 <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 <cmath>
#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
using namespace std;

int Main(){
  int x;
  cin >> x;
  double y = x;

  y = (2*y)*M_PI;

  cout << y << endl;
}


Compiler output:
a.cc: In function 'int Main()':
a.cc:29:1: warning: no return statement in function returning non-void [-Wreturn-type]
   29 | }
      | ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C

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

#define ll long long int
 
int main() {
    double n, pi = 3.1415926535897932;
    cin >> n;
    double ans = 2 * (double)(pi) * (double)(n);
    cout << fixed << setprecision(15) << ans << 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 main()
{
cin>>n;
double ans=0.0;
ans=2.0*3.14159*n*1.00;
cout<<ans<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:6: error: 'n' was not declared in this scope; did you mean 'yn'?
    6 | cin>>n;
      |      ^
      |      yn
Language: C

#include <bits/stdc++.h>
using namespace std;
#define M 1000000007
#define ll long long
#define fo(i,n) for(int i=0;i<=n;i++)
int main()
{
#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
	int t, n, c;
	cin >> t;
	cout << (2 * 3.141 * t);
}

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

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

int main()
{
  double r;cn>>r;
  cout<<2*3.1416*r<<endl;
  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: 'cn' was not declared in this scope; did you mean 'yn'?
    6 |   double r;cn>>r;
      |            ^~
      |            yn
Language: C

#include<iostream>
#include<math.h>
using namespace std;
int main(){
    double r;
    cin >> r;
    cout << (r * 2) * M_PI << endl;
    return 0;
}

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

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

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

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

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

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


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

#include <stdio.h>

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

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

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

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

/**
 *
 * @author Milo
 */
public class BackspaceString {
    static class FastReader {
        BufferedReader br;
        StringTokenizer st;
 
        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }
 
        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
 
        int nextInt() {
            return Integer.parseInt(next());
        }
 
        long nextLong() {
            return Long.parseLong(next());
        }
 
        double nextDouble() {
            return Double.parseDouble(next());
        }
 
        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
    static FastReader in = new FastReader();
    public static void main(String[] args) {
        int t = 1; //in.nextInt();
        while (t-- > 0)
            solve();
    }
 
    public static void solve() {
        
        int r = in.nextInt();
        System.out.println((2 * Math.PI * r));
        
    }
 
    public static int max(int a, int b) {
        return a > b ? a : b;
    }
 
    public static int min(int a, int b) {
        return a < b ? a : b;
    }
 
    public static int gcd(int a, int b) {
        return b == 0 ? a : gcd(b, (a % b));
    }
}


Compiler output:
Main.java:10: error: class BackspaceString is public, should be declared in a file named BackspaceString.java
public class BackspaceString {
       ^
1 error
Language: C

#include<cstdio>
#include<cmath>
#include<string>
#include<vector>
#include<algorithm>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<cstring>

using namespace std;

int main()
{
	int n;
	const double pi = 3.141592653589793;

	scanf("%d", &n);

	printf("%.10lf\n", pi*(double)(n * 2));

	return 0;
}

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

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

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

int main(){
  int s;
  cin >> s;
  
  cout << 2 * s * 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++

#inclide <bits/stdc++.h>
using namespace std;
int main(){
 int r;
  cin>>r;
  M_PI;
  int ans=2*r*PI
    cout<<ans<<endl;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inclide; did you mean #include?
    1 | #inclide <bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope
    5 |   cin>>r;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #inclide <bits/stdc++.h>
a.cc:6:3: error: 'M_PI' was not declared in this scope
    6 |   M_PI;
      |   ^~~~
a.cc:7:15: error: 'PI' was not declared in this scope
    7 |   int ans=2*r*PI
      |               ^~
Language: C

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<ll> vl ;
typedef vector<int> vi;
typedef pair<int, int> pi;
typedef pair<ll,ll> pl;

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

const int INF = 100000002;

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

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

#include<iostream>
#include<iomanip>
#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: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#include<iostream>
using namespace std;
int main()
{
	int r;
	float f = 3.141592;

	cin >> r;

	float ans = r * 2 * f;

	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 io_ ios_base::sync_with_stdio(0);cin.tie(0);

using namespace std;

int main(){
    io_
    float a; cin >> a;
	cout << 3.1416*(a^2) << "\n";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:26: error: invalid operands of types 'float' and 'int' to binary 'operator^'
    9 |         cout << 3.1416*(a^2) << "\n";
      |                         ~^~
      |                         | |
      |                         | int
      |                         float
Language: C

#include <iostream>
using namespace std;
#define PI 3.14159265359

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


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

#include <iostream>
#include <algorithm>
#include <cstring>
#include <cmath>
#include < iomanip>
using namespace std;
int r;

#define pi 3.14159265358979323846

int main(){
    cin >> r;
    double rez = 2 * pi * r;
    cout << fixed << setprecision(20) << rez;
    return 0;
}

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

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

int main() {
  int r;
  double pi = 3.141592654;
  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: Java

import java.util.Scanner;


public class Q1 {
     
	public static void main(String[] args) {
	    Scanner scan = new Scanner(System.in);
    int radius = scan.nextInt();
     System.out.println(2*Math.PI*radius);
	}
}


Compiler output:
Main.java:4: error: class Q1 is public, should be declared in a file named Q1.java
public class Q1 {
       ^
1 error
Language: C++


typedef long long ll; 
const ll mod = 1e9+7;
#define fo(i, n) for (int i = 0; i < n; i++)
#define sc(n) scanf("%d", &n) 
using namespace std;

int n;

void solve() {
    cin >> n;
    printf("%.18f", 2*3.14159265389793238*n);
}

int main() {
    int t = 1;
    //scanf("%d", &t);
    while (t--) {
        solve();
    }
    return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:11:5: error: 'cin' was not declared in this scope
   11 |     cin >> n;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | 
a.cc:12:5: error: 'printf' was not declared in this scope
   12 |     printf("%.18f", 2*3.14159265389793238*n);
      |     ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 |
Language: C

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

int main()
{
    //freopen("a.txt","r",stdin);
    double r,area, pi=3.14159;
    cin>>r;
    area=2*pi*r;
    cout<<area;
    //printf("%lf\n",area);

}


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() {
  // ここにプログラムを追記
  double a ;
  cin >> a ;
  cout << a * 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(){
	double a,b=3.141592;
	cin>>a;
	a*=2;
	cout<<a*b<<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>
#include<iostream>
#include <cmath>
using namespace std;

typedef long long ll;
typedef long double ld;
long double MAX = 10000009.0;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    ld r;
    cin>>r;
    long double M_PI = 3.1415926535897;
     std::cout << std::setprecision(11) << 2*r*M_PI << endl;
    return 0;
}


Compiler output:
In file included from /usr/include/c++/14/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:114,
                 from a.cc:1:
a.cc: In function 'int main()':
a.cc:17:17: error: expected unqualified-id before numeric constant
   17 |     long double M_PI = 3.1415926535897;
      |                 ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
double pi = 3.14159
int main(void){
  double r;
  cin >> r;
  cout << setprecision(20) <<  2*r*pi;
  cout << 
  return 0;
}
  

Compiler output:
a.cc:4:1: error: expected ',' or ';' before 'int'
    4 | int main(void){
      | ^~~
Language: C

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

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

import math
  print(2*int(R)*math.pi)


Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:2:3: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'print'
    2 |   print(2*int(R)*math.pi)
      |   ^~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	double s;
	s=2*n*3.14159265358979323846
	printf("0.8lf",s);
}

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

//
// Created by kinok on 2020/04/19.
//

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

using namespace std;

#ifndef UNTITLED2_ATCODER163_H
#define UNTITLED2_ATCODER163_H

#define ll long long
#define rep(t) for(int i=0;i<t;i++)
#define deb(a) cout<<#a<<" : "<<a<<endl
#define debv(v) do{cout<<#v<<" : ";for(auto a:v){cout << a <<" ";} cout<<endl;}while(0);
#define PI 3.141592653589793

class atcoder163{
public:void main(){
    a();
}

void a(){
    int a;
    cin>>a;
    cout<<fixed<<setprecision(8)<<a*2*PI<<endl;
}

void b(){
    ll n,m,total=0,k;
    cin>>n>>m;
    rep(m){
        cin>>k;
        total+=k;
    }
    cout<<(n<total?-1:n-total)<<endl;
}
void c(){

}

void d(){

}

void e(){

}

void f(){

}

};


#endif //UNTITLED2_ATCODER163_H


Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

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

int main() {
  int A, B;
  cin >> A >> ;
  cout << A*3.1415 <<endl;

 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: expected primary-expression before ';' token
    6 |   cin >> A >> ;
      |               ^
Language: C

// Circle Pond
#include <bits/stdc++.h>
using namespace std;
double p=3.1415926535;

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

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 << 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: C

/*
ID: wangyuxi20040901
TASK:  ()
LANG: C++
DATE: 20200419 19:22:44
*///using CRLF, UTF-8

#include <cstdio>
#include <algorithm>
#include <cstring>
#define pr printf
#define F(i, j, k) for(register int i = j, kkllkl = k; i <= kkllkl; ++i)
#define G(i, j, k) for(register int i = j, kkllkl = k; i >= kkllkl; --i)
#define clr(a, v) memset((a), v, sizeof(a))
using namespace std;
typedef long long ll;

#define isd(x) (('0' <= (x) && (x) <= '9') || (x) == '-')
int rd() {
    int ans = 0, sign = 1; char c = getchar();
    while(!isd(c)) c = getchar();
    if(c == '-') sign = -1, c = getchar();
    while(isd(c)) ans = (ans << 3) + (ans << 1) + c - '0', c = getchar();
    return sign == 1 ? ans : -ans;
}

/* --------------------------CSYZ1921------------------------- */
#include <cmath>
int r;
double ans = acos(-1);

int main() {
    // freopen(".in", "r", stdin);
    // freopen(".out", "w", stdout);
    r = rd();
    ans *= r;
    pr("%.20lf\n", ans);
    return 0;
}
/*
*/

Compiler output:
main.c:8:10: fatal error: cstdio: No such file or directory
    8 | #include <cstdio>
      |          ^~~~~~~~
compilation terminated.
Language: C


#include "bits/stdc++.h"

using namespace std;
#define rep(i, n) for (int64_t i = 0; i < n; i++)

const double PI = 3.14159265358979323846;
int main()
{
        double R;
        cin >> R;
        double ans;
        ans = R * 2 * PI;
        cout << ans << endl;
	
        return 0;
}


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 <algorithm>
#include <assert.h>
#include <bitset>
#include <cfloat>
#include <complex>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <limits.h>
#include <list>
#include <map>
#include <math.h>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <string.h>
#include <time.h>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#define rep(i,n) for(int i = 0;i < n; i++)
#define REP(i,n) for(int i = 1;i <= n; i++)
// ----GCC ONLY---- //
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// ----        ---- //
#define ll long long
#define MOD 10000007
#define PB push_back
#define PI 3.14159265359
 
using namespace std;

int main(){


    double a;
    cin >> a;

    cout << a*PI*2 <<endl;
}

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;
typedef long long ll;
typedef long double ld;

template <typename T>
using lim = numeric_limits<T>;

const double PI = acos(-1);
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);

	double r; cin >> r;
	cout << r*2*PI << "\n";

}

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

r = int(input())

print(r * 3.1416)

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

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll mod = 1e9 + 7;

int gcd(int x, int y) {
    if (x < y) swap(x, y);
    int r = x%y;
    if (r == 0) {
        return y;
    }
    return gcd(y, r);
}

ll mypow(ll x, ll n) {
    if (n == 0) return 1;
    if (n%2 == 0) return mypow(((x%mod)*(x%mod))%mod, n/2);
    else return ((x%mod) * mypow(((x%mod)*(x%mod))%mod, (n-1)/2))%mod;
}

int main(){
    double R;
    cin >> R;
    cout << fixed << setprecision(16);
    cout << 2.0*R*M_PI << 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

input = int(input())
print(input*3.141592)

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | input = int(input())
      | ^~~~~
main.c:1:1: error: type defaults to 'int' in declaration of 'input' [-Wimplicit-int]
main.c:1:9: error: expected expression before 'int'
    1 | input = int(input())
      |         ^~~
Language: C

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

#define PI 3.1415926535

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

    // cout << (double)N * (double)2.0 * (double)PI;
    printf("%lf", (double)N * (double)2.0 * (double)PI);

}

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

#include<iostream>

using namespace std;

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

	cout << 2 * R * 3.14159265358979 << 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(){
	double pi = 3.141592;
	int n;
	cin >> n;

	cout << 2 * pi*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<bits/stdc++.h>

using namespace std;

int main()
{
    int t;
    float p=6.28318530717958623200/2;

    cin>>t;
    float f=(2*p*t);
    cout<<f;
    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.