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

#include <bits/stdc++.h>
using namespace std;
//#include <ext/pb_ds/assoc_container.hpp>
//using namespace __gnu_pbds;
//typedef tree <int,null_type,less <int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
// #include <ext/rope>
// using namespace __gnu_cxx;
typedef long long int ll;
typedef long double ld;
#define FAST ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define rep(g, i, n) for (ll g = i; g < n; g++)
#define rev(g, n, i) for (ll g = n - 1; g >= i; g--)
#define all(v) v.begin(), v.end()
#define pb push_back
#define mxe(v) *max_element(v.begin(),v.end())
#define mne(v) *min_element(v.begin(),v.end())
#define ve vector
#define lb lower_bound
#define ub upper_bound
#define bb break
#define cc continue
#define rem 1000000007
#define PI 3.141592653589793238462643383279502
ll power(ll x, ll y, ll p) 
{ 
    ll res = 1;      // Initialize result 
    x = x % p;  // Update x if it is more than or 
    while (y > 0) 
    { 
        if (y & 1) 
            res = (res*x) % p; 
        y = y>>1; // y = y/2 
        x = (x*x) % p; 
    } 
    return res; 
} 
ll modInverse(ll n, ll p) 
{ 
    return power(n, p-2, p); 
} 
struct point
{
    ll x,y;
};
int main()
{
    FAST
    // freopen("input1.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    /*ll tests;
    cin>>tests;
    rep (gg,0,tests)
    {}*/
    ll r;
    cin>>r;
    cout<<fixed<<setprecision(20)<<2*PI*r<<"\n";
}


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

#include <bits/stdc++.h>
typedef long long int ll;
typedef long double ld;
using namespace std;
const long long int INF = 1e6;
const long long int inf = 1e9+7;
typedef pair<ll,ll> pairs;
vector<pairs> p;


ll gcd(ll a,ll b){
    if (a%b==0)return(b);
    else return(gcd(b,a%b));
}

ll keta(ll N){
    int tmp{};
    while( N > 0 ){
        tmp += ( N % 10 );
        N /= 10;
    }
    N = tmp;
    return N;
}

// ------------------------------------

int main(){
    ll 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

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

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

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define l long
#define pb push_back
#define mp make_pair
#define mt make_tuple
int main() {
	// your code goes here
	//ifstream cin("input.txt");
	//ofstream cout("output.txt");
	ios_base::sync_with_stdio(false); 
    cin.tie(NULL); 
	cout<<fixed<<setprecision(20);
	double r; cin>>r;
	double ans = 2*3.14159265358979323846*r;
	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<iomanip>
#include<queue>
#include<iostream>
#include<cmath>
#include<cstdio>
#define pi acos(-1)
using namespace std;

/*int arr[10000];
vector<int>adj[10000];
vector<int>v1;
bool visited[10000];
void bfs(int s)
{
    int cnt=0;
    queue<int>q;
    q.push(s);
    v1.push_back(s);
    visited[s]=1;
    cnt++;
    while(!q.empty()){
        int u=q.front();
        q.pop();
        for(int i=0;i<adj[u].size();i++){
            if(visited[adj[u][i]]==0){
                int v=adj[u][i];
                visited[v]=1;
                v1.push_back(v);
                q.push(v);
                cnt++;
            }
        }
    }
    int u=v1.size();
    for(int i=0;i<u;i++){
        arr[v1[i]-1]=cnt;
    }
    v1.clear();
}
void solve(int n)
{
    for(int i=0;i<n;i++)cout<<arr[i]<<" ";
}
int main()
{
    int m,n;
    cin>>n>>m;
    for(int i=0;i<m;i++){
        int k,j=0;
        cin>>k;
        int ara[k];
        while(j<k){
            cin>>ara[j];
            if(j){
                adj[ara[j-1]].push_back(ara[j]);
                adj[ara[j]].push_back(ara[j-1]);
            }
            j++;
        }
    }
    for(int i=0;i<n;i++){
        if(visited[i+1]==0){
          bfs(i+1);
        }
    }
    solve(n);
    //cout<<v2.size();
}
*/
int main()
{
    int a,b,t,k;
    cin>>t;
    cout<<setprecision(8)<<fixed<<t*2*pi;
}



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

#include <bits/stdc++.h>
#define MAX (ll)(1e5 + 7)
#define INF (ll)(3e18)
#define MOD (ll)(998244353)

using namespace std;
using ll = long long;

int main () {
	double pi = 3.14159;
	double r;
	cin >> r;
	cout << setprecision (5) << (2.0 * pi * r) << "\n";
}


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

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

using namespace std;
using ll = long long;
using vpii = vector<pair<int, int>>;
using vpll = vector<pair<ll, ll>>;
// ceil() 切り上げ, floor() 切り捨て
// next_permutation(all(x))

int		main(void)
{
	int R;
	cin >> R;
	printf("%.10f\n", 2 * R * M_PI);
}



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

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

const double PI = acs(-1.0);

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);	
	double r;
	cin >> r;
	cout << setprecision(10) << fixed << 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(){

    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int r;
    cin>>r;
    cout<<fixed<<setprecision(5)<<3.141592*2*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>
#define ll long long
#define ull unsigned long long
#define MP make_pair
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define PLI pair<ll, int>
#define PIL pair<int, ll>
#define STR string
#define Fst first
#define Snd second
#define SHN 1e9
#define LSHN 1e18
using namespace std;
double n;
double r=3.1415926;
int main()
{
	cout <<fixed<<setprecision(6);
	cin >>n;
	cout <<n*2.0*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;
typedef long long ll;
#define db(x) cerr<<__LINE__<<": "<<#x<<" = "<<(x)<<'\n'
const int N = 1e6;
double pi = acos(-1.0);

int main() {
    ios_base::sync_with_stdio(0);
    int a,b,r,T,cas=0;
    cin>>r;
    cout<<pi*r*2;
    return 0;
}

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

    #include <bits/stdc++.h>
    #define rep(i,n) for(int i = 0; i < (n); i++)
     
    using namespace std; 
    using ll = long long;
    using P = pair<int,int>; 
    
    int main() {
     double r;
     cin >> r;
     
     const double pi = 3.14159265;
     	cout << 2*r*pi << '\n';
     
     return 0;
    }
    

Compiler output:
main.c:1:14: fatal error: bits/stdc++.h: No such file or directory
    1 |     #include <bits/stdc++.h>
      |              ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

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

void Main()
{
  int R;
  cin >> R;
  cout << 2.0 * acos(-1) * R << endl;
}

int main()
{
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  cout << fixed << setprecision(20);
  Main();
  return 0;
}

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

#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <cmath>
#include <queue>
#include <numeric>
#include <bitset>
#include <iomanip>

using namespace std;
#define repp(i,a,b) for(int i = (int)(a) ; i < (int)(b) ; ++i)
#define reppe(i,a,b) for(int i = (int)(a) ; i <= (int)(b) ; ++i)
#define repm(i,a,b) for(int i = (int)(a) ; i > (int)(b) ; --i)
#define repme(i,a,b) for(int i = (int)(a) ; i >= (int)(b) ; --i)

typedef long long ll;

long long GCD(long long a, long long b){if(b==0)return a;return GCD(b,a%b);}

int main() {
    float R; cin >> R;
    cout << setprecision(12) << R * 6.28318530717958623200 << endl;

}


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())
ans = r * 2 * math.pi
print(ans)


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 = int(input())
      | ^
Language: C

#include <iostream>
#include <string>
#include <vector>
#include <stdio.h>
#include <algorithm>
#define _USE_MATH_DEFINES
#include <cmath>
#include <numeric>
#include <iomanip>
#include <deque>
#include <tuple>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <unordered_map>
#include <sstream>
#include <stdexcept>
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>

#define rep(i, x) for (int i = 0; i < (int)(x); i++)
#define FOR(i, a, done) for (int i = (a); i < (done); ++i)
#define all(a) (a).begin(), (a).end()
#define x first
#define y second
#define debug(a) cout << (a) << endl
namespace mp = boost::multiprecision;
using cpp_int = mp::cpp_int;
using ll = long long;
using namespace std;

ll M = 1000000007;


void solve()
{
	int r;
	cin>>r;
	double ans=2*r*M_PI;
	printf("%.4f\n",ans);

	
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	solve();
	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 << fixed << setprecision(10)
    << 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<iostream>
using namespace std;
int main()
{
    // 整数の入力
    int a;
    cin >> a;
    // スペース区切りの整数の入力
    
    
    cout << (2*3.1415*a) 
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:25: error: expected ';' before 'return'
   11 |     cout << (2*3.1415*a)
      |                         ^
      |                         ;
   12 |     return 0;
      |     ~~~~~~
Language: C

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

int main() {
  int r;
  ll p;

  cin >> r;
  cout << fixed << setprecision(10);
  cout << 2*r*3.14159265358979 << 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 << double(r*3.141592);
}


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<queue>
#include<deque>
#include<cmath>
#include<map>
#include<cstring>

using namespace std;
typedef long long ll;
const int INF = 1e9;
const int MOD = 1e9 + 7;
const ll LLINF = 1LL<<60;
#define P pair<ll, ll>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define print(x) cout << (x) << endl

class mint {
    long long x;
public:
    mint(long long x=0) : x((x%MOD+MOD)%MOD) {}
    mint operator-() const {
      return mint(-x);
    }
    mint& operator+=(const mint& a) {
        if ((x += a.x) >= MOD) x -= MOD;
        return *this;
    }
    mint& operator-=(const mint& a) {
        if ((x += MOD-a.x) >= MOD) x -= MOD;
        return *this;
    }
    mint& operator*=(const  mint& a) {
        (x *= a.x) %= MOD;
        return *this;
    }
    mint operator+(const mint& a) const {
        mint res(*this);
        return res+=a;
    }
    mint operator-(const mint& a) const {
        mint res(*this);
        return res-=a;
    }
    mint operator*(const mint& a) const {
        mint res(*this);
        return res*=a;
    }
    mint pow(ll t) const {
        if (!t) return 1;
        mint a = pow(t>>1);
        a *= a;
        if (t&1) a *= *this;
        return a;
    }
    // for prime MOD
    mint inv() const {
        return pow(MOD-2);
    }
    mint& operator/=(const mint& a) {
        return (*this) *= a.inv();
    }
    mint operator/(const mint& a) const {
        mint res(*this);
        return res/=a;
    }

    friend ostream& operator<<(ostream& os, const mint& m){
        os << m.x;
        return os;
    }
};

/* -- template -- */

int main() {
    double R; cin >> R;
    printf("%.5f", 2 * R * M_PI);
}


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

#include<iostream>
#include<vector>
#include<algorithm>
#include<tuple>
#include<utility>
#include<math.h>

using namespace std;

typedef long long int64;

int main(void){
    double R;
    cin>>R;
    cout<<R*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;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
using Pl = pair<ll,ll>;
#define REP(i,n) for(ll i = 0;i < (ll)n;i++)
#define REPD(i,n) for(ll i = (ll)n - 1;i >= 0;i--)
#define ALL(x) (x).begin(),(x).end()
#define FILLl(n,first_dimension_size,value) fill((ll*)n,(ll*)(n+first_dimension_size),value)
#define FILL(n,first_dimension_size,value) fill((int*)n,(int*)(n+first_dimension_size),value)
#define INF (1 << 30)
#define MOD 1000000007
//int dy[4] = {-1,0,0,1};
//int dx[4] = {0,1,-1,0};



int main(){

  int n;
  cin >> n;
  cout << (3.1415926535)*n*2.0 << endl;
  


  

  return 0;
}


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

#include <iostream>
#include <algorithm>
#include <iomanip>
#include <string>
#include <vector>
#include <math.h>
#include <queue>
#include <deque>
#include <map>
const int MOD = 1e9+7;
typedef long long ll;
using namespace std;


int main(){
	double r;
	cin >> r;
	cout << 2*r*3.1415926535 << endl;
	return 0;
}

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

#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> ii;
#define F first
#define S second
#define sqr(x) (x)*(x)
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x,y) make_pair(x,y)
#define all(x) (x).begin(),(x).end()
#define rep(i,x,y) for(int i=x;i<(y);++i)
#define IOS ios_base::sync_with_stdio(0);cin.tie(0)
/* start */

const double PI = acos(-1);

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

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

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

#define ll long long int
#define endl '\n'
ll const mod = 1e9 + 7;

ll power(ll x, ll y, ll p){ //x^y % p
    ll res = 1;      // Initialize result 
    x = x % p;  // Update x if it is more than or equal to p 
    while (y > 0) {
        if (y & 1) // If y is odd, multiply x with result 
        res = (res*x) % p; 
        // y must be even now 
        y = y>>1; // y = y/2 
        x = (x*x) % p; 
    } 
    return res; 
}

ll MIN(ll a, ll b) {
    if(a<b) return a;   return b;
}

ll MAX(ll a, ll b) {
    if(a>b) return a;   return b;
}

int main() {
    
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    double r;
    cin>>r;
    
    cout<<fixed;
    cout<<setprecision(10)<<2*3.1415926535*r;
    
	// your code goes here
	return 0;
}


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

//----------------------------------------------------------------------
#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)   FOR(i,0,n)
//----------------------------------------------------------------------

using namespace std;
using ll = long long;
using P = pair<int,int>;
using Graph = vector<vector<int>>;

int main(void) {
    double r;
    cin >> r;
    cout << setprecision(10);
    cout << 2 * r *  M_PI << 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>
#include <cmath>
using namespace std;

int main() {
int r;
  
  cin>>r;
  double S=2*r*M_PI;
  cout<<S;
    
}


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 fastt ios_base::sync_with_stdio(false);cin.tie(NULL);
#define enl "\n"
#define ll long long
#define pb push_back
#define fi first
#define se second
#define vvl vector<vector<ll>> 
#define vl vector<ll> 
#define vpll vector<pair<ll,ll>>
#define all(x) x.begin(),x.end()
#define ffor(i,n) for(ll i = 0; i < n; ++i)
#define PI 3.14159265 
ll mod=1e9+7;

 int main(){
     fastt;
     ll i,j,k;
   cin>>j;
   cout<<2*PI*j<<enl;
 }


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

#include <bits/stdc++.h>

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

using namespace std;

using ll = long long;
using P = pair<int, int>;

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

  double res = (double) 2 * r * M_PI;

  cout << fixed << setprecision(10) << 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 <algorithm>
#include <cmath>
#include <iostream>
#include <string>
#include <vector>

using namespace std;
int main() {
  double n, pi;
  cin >> n;
  pi = acos(-1);
  cout << 2.0 * n * pi << endl;
}

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

import sys
stdin = sys.stdin
sys.setrecursionlimit(10**6)
ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
nn = lambda: list(stdin.readline().split())
ns = lambda: stdin.readline().rstrip()

n = ni()

import math

print(2*n*math.pi)

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import sys
      | ^~~~~~
main.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'stdin'
    2 | stdin = sys.stdin
      | ^~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
typedef		long long       ll;
typedef         long double      dl;
typedef     unsigned long long  ull;
#define		pb              push_back
#define		PB              pop_back
#define		nn              "\n"
#define     O_O             ios_base::sync_with_stdio(false); cin.tie(NULL)
#define		all(p)          p.begin(),p.end()
#define		zz(v)           (ll)v.size()
#define		ss              ' '
#define         arrsize(a)      (sizeof(a)/sizeof(a[0]))
//#define       arrsize(a)      (sizeof(a)/sizeof(*a))
#define 	S(a)            scanf("%lld",&a)
#define 	SS(a,b)         scanf("%lld %lld",&a,&b)
#define 	SSS(a,b,c)      scanf("%lld %lld %lld",&a,&b,&c)
#define		gcd(a,b)        __gcd(a,b)
#define		lcm(a,b)        (a*b)/gcd(a,b)
#define		pi              acos(-1.0)
typedef        pair <int, int>   pii;
typedef       pair <ll, ll>      pll;
typedef      vector< pair <ll, ll> >      vpll;
typedef		vector<ll>      vll;
typedef		map<string,ll>      msl;
typedef		map<ll,ll>      mll;
#define yes cout << "YES\n"
#define no cout<<"NO\n"
//#define sort(x) sort(x.begin(), x.end())
//sort(a,a+n,greater<ll>())
//for (auto it = mp.begin(); it != mp.end(); ++it){}
#define MAX 1000005
#define mod 1000000007



int main()
{
 //O_O ;
   dl t;
   cin>>t;
  cout<<2*t*pi<<nn;


    return 0;
}


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

#include<iostream>
#include<string>
#include<vector>
#include<queue>
#include<algorithm>
#include<map>
#include<set>
#include<cmath>
typedef long long ll;
#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define sz(a) (int)a.size()
using namespace std;

ll INF = 1000000007;

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

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

int main(){
    int N,ans;
    cin >> N;
    
    
    
    cout << N*2*3.14159;
    cout << endl;
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:3:5: error: 'cin' undeclared (first use in this function)
    3 |     cin >> N;
      |     ^~~
main.c:3:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:7:5: error: 'cout' undeclared (first use in this function)
    7 |     cout << N*2*3.14159;
      |     ^~~~
main.c:8:13: error: 'endl' undeclared (first use in this function)
    8 |     cout << endl;
      |             ^~~~
Language: C

#include<iostream>
#include<vector>
#include<string>
#include<algorithm>
#include<tuple>
#include<map>
#include<queue>
#include<math.h>
#include<numeric>
#include<iomanip>
#define rep(i, n) rep2(i,0,n)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define PI acos(-1);
typedef long long ll;
using namespace std;
const int MOD = 1000000007;
//scanf("%d", &a); '\n'; cout << fixed << setprecision(10);

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int r;
	cin >> r;
	cout << fixed << setprecision(10);
	cout << r*2 * PI;
}

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

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

using namespace std;
using ll = long long;

void _cin(){} template <class Head, class... Tail> void _cin(Head&& head, Tail&&... tail){ cin >> head; _cin(forward<Tail>(tail)...); }
void _cout(){ cout << "\n"; } template <class Head, class... Tail> void _cout(Head&& head, Tail&&... tail){ cout << head; _cout(forward<Tail>(tail)...); }
int gcd(int a, int b){ return (b == 0) ? a : gcd(b, a % b); }
template<typename S, typename T> ostream& operator<<(ostream &os, const pair<S, T> &p){ cout << "[" << p.first << ", " << p.second << "]"; return os; }

#define Sq(x) (x)*(x)
#define For(i, n) for(int i = 0; i < (n); i ++)
#define Rep(n) For(_, n)
#define Range(c) c.begin(), c.end()
#define RevRange(c) c.rbegin(), c.rend()
#define Contains(c, x) (find(Range(c), x) != c.end())
#define Search(rb, re, x) distance(rb, find(rb, re, x))
#define Sort(a) sort(Range(a))
#define DeSort(a) sort(RevRange(a))
#define Reverse(c) reverse(Range(c))
#define Unique(a) a.erase(unique(Range(a)), a.end())
#define Cusum(T, xs, sxs) vector<T> sxs(xs.size()+1); For(i, (int)xs.size()) sxs[i+1] = sxs[i] + xs[i]
#define Cin(T, ...) T __VA_ARGS__; _cin(__VA_ARGS__)
#define Cins(T, n, xs) vector<T> xs(n); For(i, n) cin >> xs[i]
#define Cins2(T, n, xs, ys) vector<T> xs(n), ys(n); For(i, n) cin >> xs[i] >> ys[i]
#define Cins3(T, n, xs, ys, zs) vector<T> xs(n), ys(n), zs(n); For(i, n) cin >> xs[i] >> ys[i] >> zs[i]
#define Cinss(T, n, m, xs) Vec2(T, n, m, xs); For(i, n) For(j, m) cin >> xs[i][j]
#define Cinm(T, n, map) unordered_map<T, int> map; Rep(n){ Cin(T, x); map[x] ++; }
#define Cout(...) _cout(__VA_ARGS__)
#define Couts(xs) { for(const auto &e : xs) cout << e << " "; cout << "\n"; }
#define Coutyn(cond) Cout((cond) ? "yes" : "no")
#define CoutYn(cond) Cout((cond) ? "Yes" : "No")
#define CoutYN(cond) Cout((cond) ? "YES" : "NO")
#define Return(expr) { Cout(expr); return 0; }
#define vc vector
#define Mini(a, x) a = min(a, x)
#define Maxi(a, x) a = max(a, x)

// constexpr int MOD = 1e9+7;

// A
int main(void){
    Cin(int, a, b, c, d);
    printf("%.15f\n", a*6.28318530717958623200);
}


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

#include <bits/stdc++.h>
#define fastIO ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define int long long int
#define trace1(x)                cout<<#x<<": "<<x<<endl
#define trace2(x, y)             cout<<#x<<": "<<x<<" | "<<#y<<": "<<y<<endl
#define trace3(x, y, z)          cout<<#x<<":" <<x<<" | "<<#y<<": "<<y<<" | "<<#z<<": "<<z<<endl
#define trace4(a, b, c, d)       cout<<#a<<": "<<a<<" | "<<#b<<": "<<b<<" | "<<#c<<": "<<c<<" | "<<#d<<": "<<d<<endl
#define trace5(a, b, c, d, e)    cout<<#a<<": "<<a<<" | "<<#b<<": "<<b<<" | "<<#c<<": "<<c<<" | "<<#d<<": "<<d<<" | "<<#e<< ": "<<e<<endl
#define trace6(a, b, c, d, e, f) cout<<#a<<": "<<a<<" | "<<#b<<": "<<b<<" | "<<#c<<": "<<c<<" | "<<#d<<": "<<d<<" | "<<#e<< ": "<<e<<" | "<<#f<<": "<<f<<endl
#define debugVec(vec) cout<<(#vec)<<": "; for (auto& i: vec) cout<<i<<" "; cout<<endl
#define pb push_back
#define ff first
#define ss second
#define all(v) (v).begin(), (v).end()
#define mod (int)(1e9+7)
using namespace std;
#define trace(args...) { string _s = #args; replace(_s.begin(), _s.end(), ',', ' '); stringstream _ss(_s); istream_iterator<string> _it(_ss); err(_it, args);cout << endl; }
void err(istream_iterator<string> it) {}
template<typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {
    cerr << *it << " = " << a << " ";
    err(++it, args...);
}
signed main(){
	fastIO

    int r;
    cin >> r;
    cout << 2 * r * (3.14);


    return 0;

}


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

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

int main() {
	int R;
	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

r = int(input())
print(r*3.14*2)


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

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


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

#include <algorithm>
#include <array>
#include <cstddef>
#include <cstdint>
#include <iomanip>
#include <iostream>
#include <map>
#include <set>
#include <vector>

using namespace std;

int main()
{
    double r;
    cin >> r;
    cout << 2 * 3.1415926535 * r << endl;
}


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

from math import pi

print(int(input()) * 2 * pi)

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

//   PIGMEISTER™   //

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

#define ll long long
#define ull unsigned long long
#define sidha(i,x,n) for(ll i=(ll)(x);i<(ll)(n);++i)
#define ulta(i,x,n) for(ll i=(ll)(x);i>=(ll)(n);--i)
#define sab(a) a.begin(),a.end()
#define bas(a) a.rbegin(),a.rend()
#define modinv(x) powah(x,mod-2)
#define ncr(n,r) (((fact[n]*modinv(fact[n-r]))%mod*modinv(fact[r]))%mod)
#define factorial fact.pb(1);sidha(i,1,MAX)fact.pb((fact[i-1]*i)%mod)
#define test ll _;cin>>_;while(_--)
#define jaldi ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define mod (ll)1000000007
//#define mod (ll)998244353
#define MAX 100005

int main()
{
    jaldi;
    
    ll r;
    cin >> r;
    double pi = 3.1415926535;
    cout << (double)2*pi*r;
    
    return 0;
}
//   PIGMEISTER™   //

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

#define ll long long
#define ull unsigned long long
#define sidha(i,x,n) for(ll i=(ll)(x);i<(ll)(n);++i)
#define ulta(i,x,n) for(ll i=(ll)(x);i>=(ll)(n);--i)
#define sab(a) a.begin(),a.end()
#define bas(a) a.rbegin(),a.rend()
#define modinv(x) powah(x,mod-2)
#define ncr(n,r) (((fact[n]*modinv(fact[n-r]))%mod*modinv(fact[r]))%mod)
#define factorial fact.pb(1);sidha(i,1,MAX)fact.pb((fact[i-1]*i)%mod)
#define test ll _;cin>>_;while(_--)
#define jaldi ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define mod (ll)1000000007
//#define mod (ll)998244353
#define MAX 100005

int main()
{
    jaldi;
    
    ll r;
    cin >> r;
    double pi = 3.1415926535;
    cout << (double)2*pi*r;
    
    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 <bits/stdc++.h>
#define ll long long
#define sz(x) (int)(x).size()
using namespace std;

int binpow(int a, int b) {
    if (b == 0)
    {
        return 1;
    }
    ll res = binpow(a, b / 2);
    res*=res;
    if (b % 2)
    {
        return res * a;
    }
    return res;
}

ll gcd(ll a,ll b)
{
    if (b==0) return a;
    return gcd(b,a%b);
}

string to_upper(string a)
{
    for (int i=0;i<(int)a.size();++i) if (a[i]>='a' && a[i]<='z') a[i]-='a'-'A';
    return a;
}
 
string to_lower(string a)
{
    for (int i=0;i<(int)a.size();++i) if (a[i]>='A' && a[i]<='Z') a[i]+='a'-'A';
    return a;
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    double pi=3.1415926;
    int n;
    cin>>n;
    cout<<pi*2*n;
    return 0;
}

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

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


int compare_int(const void *a, const void *b)
{
    return *(int*)a - *(int*)b;
//    return *(long long*)a - *(long long*)b;
}
//  qsort(A, b, sizeof(int), compare_int);

//long long  factorial(long long n) {
//    if (n > 0) {
//        return n * factorial(n - 1);
//    } else {
//        return 1;
//    }
//}
long long  factorial(long long n, long long depth) {
    if (n > 1) {
        depth++;
        return factorial(n / 2, depth);
    } else {
        return depth;
    }
}

int min(int a, int b) {
    if (a > b)
        return b;
    else
        return a;
}

int distance(int a, int b) {
  return abs(a-b)*abs(a-b);
}



//int ()
/*
int triangle(int a, int b, int c){
  if(a<b+c){
    if(b<c+a){
      if(c<a+b){
        printf("1\n");
        return 1;
      }
    }
  }
  printf("1\n");
  return 0;
}
*/

int main()
{
//  int  a, b, c, d, e, X, Y ,r;
  unsigned double  a, b, c, d, e, X, Y;
  //  double  c;
// long long  A[200003]={};
  int  A[200003]={};
  int  B[100003]={};
//  int  C[100003][100001]={};
  int  C[100003]={};

  int  flg=0;

//  char s[101][101]={};
  char s[100001]={};
  char t[100001]={};
//  int N, M;
//  int A[1000000001]={};
//  long long  C[101]={};
  int i,j,k;
  long long p=0,q=0;
  int sosuu[46] ={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199};
  int min =100000001;
  int len=0;
  int l=0;
  int cnt=0;
  int num=0;
  int num1=0;
  int num2=0;
  long long  ans=0;
  int ans_ac=0;
  int ans_wa=0;
  int max=0;
  long long sum=0;
  int addr=0;
  int ptn=0;
  int  tmp=0;
  double per=0; 
//  bool on_off[100]={};
  
//  char alp[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};

  //  a=0;
  scanf("%llf", &a);
  printf("%lf\n", 3.14*2*a);
  
return 0;
}


Compiler output:
main.c: In function 'main':
main.c:62:12: error: both 'unsigned' and 'double' in declaration specifiers
   62 |   unsigned double  a, b, c, d, e, X, Y;
      |            ^~~~~~
Language: C

#include <stdio.h>
int main() {
  int R;
  scanf("%d", &R);
  printf("%lf", R*2*3.14159265358979)
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:5:38: error: expected ';' before 'return'
    5 |   printf("%lf", R*2*3.14159265358979)
      |                                      ^
      |                                      ;
    6 |   return 0;
      |   ~~~~~~
Language: C

#include <bits/stdc++.h>

using namespace std;

const double PI = 3.14159265358979323846;
typedef long long ll;
const double EPS = 1e-9;
#define rep(i, n) for (int i = 0; i < (n); ++i)
//#define rep(i, n) for (ll i = 0; i < (n); ++i)
//typedef pair<ll, ll> P;
typedef pair<ll, ll> P;
const ll INF = 10e17;
#define cmin(x, y) x = min(x, y)
#define cmax(x, y) x = max(x, y)
#define ret() return 0;

double equal(double a, double b) {
    return fabs(a - b) < DBL_EPSILON;
}

std::istream &operator>>(std::istream &in, set<int> &o) {
    ll a;
    in >> a;
    o.insert(a);
    return in;
}

std::istream &operator>>(std::istream &in, queue<int> &o) {
    ll a;
    in >> a;
    o.push(a);
    return in;
}

bool contain(set<int> &s, int a) { return s.find(a) != s.end(); }

//ofstream outfile("log.txt");
//outfile << setw(6) << setfill('0') << prefecture << setw(6) << setfill('0') << rank << endl;
// std::cout << std::bitset<8>(9);
//const ll mod = 1e10;

typedef priority_queue<ll, vector<ll>, greater<ll> > PQ_ASK;
const int mod = 1000000007;


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

    printf("%.20f\n", r * 2 * PI);
}



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

//
//  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;
}


Compiler output:
main.c:9:10: fatal error: bits/stdc++.h: No such file or directory
    9 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

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

}


Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.util.*;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.util.*;
      |            ^
main.c:2:1: error: unknown type name 'import'
    2 | import java.io.*;
      | ^~~~~~
main.c:2:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    2 | import java.io.*;
      |            ^
main.c:3:1: error: unknown type name 'import'
    3 | import java.math.*;
      | ^~~~~~
main.c:3:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    3 | import java.math.*;
      |            ^
main.c:5:1: error: unknown type name 'public'
    5 | public class Main {
      | ^~~~~~
main.c:5:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    5 | public class Main {
      |              ^~~~
Language: C

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

int main() {
  double R;
  cin >> R;
  cout << R*3.14*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>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define INF 1e9
#define PI 3.14159265359
#define MOD 1000000007
#define ALL(v) v.begin(),v.end()
#define ALLR(v) v.rbegin(),v.rend()
typedef long long ll;
const int dx[4] = {1,0,-1,0};
const int dy[4] = {0,1,0,-1};
//isPrime
//modpow modinv
//getDigit
int main() {
  cout << fixed << setprecision(10);
  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

from math import pi

R=int(input())
print(2*R*pi)

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

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

int main(){
  int R;
  cin >>R;
  double A;
  A = 2*3.1415926535897*R
  cout<<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 <bits/stdc++.h>
using namespace std;

int main() {
  
  int a;
  cin >> a;
  cout << a*a *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;

int main() {

    // 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 << setprecision(20) << R*2*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: C

#include<bits/stdc++.h>
using namespace std;
#define ll long long int
# define M_PIl          3.141592653589793238462643383279502884L
int main()
{
	ll n;
	cin>>n;
	cout<<fixed<<setprecision(20)<<(2*M_PIl*n)<<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(){

   long long int a,b,c,d=0,e,f,g,i,j,k,t=0,u=0,w,nt;
   double res;
   string x,y;
   char ch,ch1;
   vector<int> v;
   map<int,char> mp;
   map<int,char> mp2;
   vector<string> v1;
   set<int> s;
  cin>>a;
   res=2*3.1416*double(a);
  cout<<res<<endl;



 return 0;
}


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

#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <string>
#include <deque>
using namespace std;
using P = pair<int,int>;
typedef long long int ll;
#define rep(i, n) for (int(i) = 0; (i) < (n); (i)++)
#define PI 3.14159265359
ll gcd(ll a, ll b) {//最大公約数
    if(a<b){
        ll tmp = a;
        a = b;
        b = tmp; 
    }
    if (b==0) return a;
    else return gcd(b, a%b);
}
ll lcm(ll a, ll b) {//最小公倍数
    return a * b / gcd(a, b);
}

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

}




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

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main(){
  double p=3.14159;
  double n;
  cin >> n;
  cout << fixed << setprecision(5);
  cout << 2*p*n << 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>
#define _LIBCPP_DEBUG 0
using namespace std;
typedef long long int ll;
ll MOD = 1e9 + 7;
int INF = 1 << 30;
    
int main(void){

    double R; cin>>R;
    printf("%lf",R*2*M_PI);

}

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

#include <iostream>
#include <vector>
// #include <algorithm>
// #include <queue>
// #include <cmath>
// #include <string>
// #include <numeric>
// #include <set>
// #include <map>
// #include <iomanip>

// #define MOD 1000000007
// #define INF 1000000001

using namespace std;
// typedef unsigned long long ull;
// typedef long long ll;

void p_() {
    cout << "\n";
}
template<class Head, class... Body>
void p_(Head head, Body... body) {
    cout << head << ",";
    p_(body...);
}


int main(int argc, char const *argv[]) {
    int R;
    cin >> R;
    cout << R*2*3.14159 << endl;
    return 0;
}


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

#include "bits/stdc++.h"
using namespace std;
#define int long long
#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 FOR(i, s, n) for (int i = s; i < (int)n; ++i)
#define RFOR(i, s, n) for (int i = (int)n - 1; i >= s; --i)
#define ALL(a) a.begin(), a.end()
#define IN(a, x, b) (a <= x && x < b)
template<class T>inline void out(T t){cout << t << "\n";}
template<class T,class... Ts>inline void out(T t,Ts... ts){cout << t << " ";out(ts...);}
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;}
constexpr int INF = 1e9;



signed main(){
	int r;
	cin >> r;
	printf("%.20lf\n",2 * r * acos(-1));
}

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

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

int main() {
    double R;
    cin >> R;
    cout << R * 2.0 * 3.141592653589 << 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 r;
    cin >> r;

    cout << r * 2 * 3.1415 << endl;
}

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

#include<cstdio>

int r;
const double pi = 3.1415926;

int main() {
  scanf("%d", &r);
  printf("%lf", 2 * r * pi);
}


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

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




int main(){
    ll n;cin>>n;
    cout<<fixed<<2*n*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

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// スペース区切りの整数の入力
		int b = sc.nextInt();
      System.out.println(b*2*math.PI);
	}
}

Compiler output:
Main.java:7: error: cannot find symbol
      System.out.println(b*2*math.PI);
                             ^
  symbol:   variable math
  location: class Main
1 error
Language: C

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

int n;
int main() {
	cin >> n;
	printf("%.9f", 2*n*3.141592);
	return 0;
}


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

#include <bits/stdc++.h>
#define debug(...) fprintf(stderr, __VA_ARGS__)
using namespace std;
 
void read (int&a) {
	a = 0; char k = getchar(); int f = 1;
	for(;!isdigit(k); k = getchar()) if (k == '-') f = -1;
	for(; isdigit(k); k = getchar()) a = a * 10 + k - '0';
	a *= f;
}

int main ()
{
	double k, pi = acos(-1);
	scanf ("%lf", &k);
	printf ("%.10lf\n", 2 * pi * k);
	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;

const double pi = acos(-1);

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


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