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

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

int main() {
  int x
    cin >> x;
  cout << 3.14 * x * 2 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: expected initializer before 'cin'
    6 |     cin >> x;
      |     ^~~
a.cc:7:18: error: 'x' was not declared in this scope
    7 |   cout << 3.14 * x * 2 << endl;
      |                  ^
Language: C++

#include <iostream>
using namespace std;

int main() {
  int x;
  cin >> x;
　cout >> 3.14 * x * 2 >> endl;
}


Compiler output:
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　cout >> 3.14 * x * 2 >> endl;
      | ^
a.cc: In function 'int main()':
a.cc:7:1: error: '\U00003000cout' was not declared in this scope
    7 | 　cout >> 3.14 * x * 2 >> endl;
      | ^~~~~~
Language: C++

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

int main() {
  int x;
  cin >> x;
　cout >> 3.14 * x * 2 >> endl;
}


Compiler output:
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　cout >> 3.14 * x * 2 >> endl;
      | ^
a.cc: In function 'int main()':
a.cc:7:1: error: '\U00003000cout' was not declared in this scope
    7 | 　cout >> 3.14 * x * 2 >> endl;
      | ^~~~~~
Language: C

// IlyM

#include <bits/stdc++.h>

#define pb push_back
#define sp " "
#define sl "\n"
#define fi first
#define se second
#define mp make_pair
#define sz(a) ((int)a.size())
#define all(a) a.begin(),a.end()
#define rev(a) reverse(a.begin(),a.end())

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> ii;
typedef vector<ii> vii;
typedef pair<int,ii> iii;

const int N=1e6+5,mod=1000000007;
double r;
int main()
{
	cin.tie(0); cout.tie(0);
	ios_base::sync_with_stdio(0);
	cin>>r;
	r*=3.14159265;
	r*=2;
	cout<<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>
using namespace std;

int main() {
  int x;
  cin >> x;
　cout >> 3.14 * x * 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>
int main(){
  int R;
  cin>>R;
  cout<<2*3.14*R;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   cin>>R;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:5:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |   cout<<2*3.14*R;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main
{
    float a;
    
    cin>>a;
    cout<<2*3.14*a<<<endl;

    return 0;
}

Compiler output:
a.cc:3:5: error: cannot declare '::main' to be a global variable
    3 | int main
      |     ^~~~
a.cc:5:5: error: expected primary-expression before 'float'
    5 |     float a;
      |     ^~~~~
a.cc:5:5: error: expected '}' before 'float'
a.cc:4:1: note: to match this '{'
    4 | {
      | ^
a.cc:7:5: error: 'cin' does not name a type
    7 |     cin>>a;
      |     ^~~
a.cc:8:5: error: 'cout' does not name a type
    8 |     cout<<2*3.14*a<<<endl;
      |     ^~~~
a.cc:10:5: error: expected unqualified-id before 'return'
   10 |     return 0;
      |     ^~~~~~
a.cc:11:1: error: expected declaration before '}' token
   11 | }
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define FS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long int
#define ld long double
#define pb push_back
#define bp __builtin_popcount
#define sz size()
#define ff first
#define ss second
#define vll vector<ll>
#define vbool vector<bool>
#define vpll vector<pair<ll,ll>>
#define pll pair<ll,ll>
#define vllv vector<vector<ll>>
#define setpri(x) cout<<setprecision(x)<<fixed;
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define yesr {cout<<"YES"<<endl;return;}
#define nor {cout<<"NO"<<endl;return;}
// getline (std::cin,name);
ll MOD=1e9+7;
ll ceil1(ll n,ll x){if(n%x==0)return n/x; else return (n/x)+1;}
ll gcd(ll a,ll b){return __gcd(a,b);}
ll lcm(ll a,ll b){return (max(a,b)/gcd(a,b))*min(a,b);}
ll pow1(ll n,ll k,ll mm){
    if(k==0)return 1;
    if(k%2==0)return (pow1((n%mm)*(n%mm),k/2,mm))%mm;
    return ((n%mm)*(pow1((n%mm)*(n%mm),k/2,mm)%mm))%mm;
}
ll pow2(ll n,ll k){ll ans=1;
    while(k>0){
        if(k%2==1)ans=ans*n;n=n*n;k/=2;
    }return ans;
}
ll modinv(ll A,ll M){return pow1(A,M-2,M);}
ll fact(ll n){ll s=1; for(ll i=1;i<=n;i++)s*=i; return s;}
ll factmod(ll n,ll mod){ll s=1; for(ll i=1;i<=n;i++){s*=i;s%=mod;} return s;}
vll fact1tonmod(ll n,ll mod){vll  ans(n+1);ans[0]=ans[1]=1;
    for(ll i=2;i<=n;i++)ans[i]=(ans[i-1]*i)%mod;
    return ans;
}
ll ncrmod(ll n,ll r,ll mod){
    ll ans=((((factmod(n,mod)%mod)*(modinv(factmod(r,mod),mod)%mod))%mod)*(modinv(factmod(n-r,mod),mod)))%mod;
    return ans;
}
ll ncr(ll n,ll r){if(n==1 || r==0)return 1;if(r>n/2)r=n-r;
    ll ans=1;for(ll i=1;i<=r;i++){ans=((ans * n )/i);n--;}return ans;
}
bool isprime(ll n){if(n==1 || (n!=2 && n%2==0))return false; if(n==2)return true; 
        for(ll i=3;i<=sqrt(n);i+=2)if(n%i==0)return false; return true; }
bool func(pair<ll,ll> &a,pair<ll,ll> &b ){
    if(a.ff != b.ff)return a.ff < b.ff;
    return a.ss > b.ss;
}
void solve(){
    ll i,j,l,m,x,y,z,r;
    cin>>n;
  double ans=2.0*3.1415927*(double)n;
  cout<<fixed<<setpricision(10)<<ans;
}
int main(){
    // FS;
    ll i,j,k,n,m,x,y,z,q;
    q=1;
	// cin>>q;
    while(q--){
        solve();
    }
    return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:58:10: error: 'n' was not declared in this scope
   58 |     cin>>n;
      |          ^
a.cc:60:16: error: 'setpricision' was not declared in this scope
   60 |   cout<<fixed<<setpricision(10)<<ans;
      |                ^~~~~~~~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
#define FS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long int
#define ld long double
#define pb push_back
#define bp __builtin_popcount
#define sz size()
#define ff first
#define ss second
#define vll vector<ll>
#define vbool vector<bool>
#define vpll vector<pair<ll,ll>>
#define pll pair<ll,ll>
#define vllv vector<vector<ll>>
#define setpri(x) cout<<setprecision(x)<<fixed;
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define yesr {cout<<"YES"<<endl;return;}
#define nor {cout<<"NO"<<endl;return;}
// getline (std::cin,name);
ll MOD=1e9+7;
ll ceil1(ll n,ll x){if(n%x==0)return n/x; else return (n/x)+1;}
ll gcd(ll a,ll b){return __gcd(a,b);}
ll lcm(ll a,ll b){return (max(a,b)/gcd(a,b))*min(a,b);}
ll pow1(ll n,ll k,ll mm){
    if(k==0)return 1;
    if(k%2==0)return (pow1((n%mm)*(n%mm),k/2,mm))%mm;
    return ((n%mm)*(pow1((n%mm)*(n%mm),k/2,mm)%mm))%mm;
}
ll pow2(ll n,ll k){ll ans=1;
    while(k>0){
        if(k%2==1)ans=ans*n;n=n*n;k/=2;
    }return ans;
}
ll modinv(ll A,ll M){return pow1(A,M-2,M);}
ll fact(ll n){ll s=1; for(ll i=1;i<=n;i++)s*=i; return s;}
ll factmod(ll n,ll mod){ll s=1; for(ll i=1;i<=n;i++){s*=i;s%=mod;} return s;}
vll fact1tonmod(ll n,ll mod){vll  ans(n+1);ans[0]=ans[1]=1;
    for(ll i=2;i<=n;i++)ans[i]=(ans[i-1]*i)%mod;
    return ans;
}
ll ncrmod(ll n,ll r,ll mod){
    ll ans=((((factmod(n,mod)%mod)*(modinv(factmod(r,mod),mod)%mod))%mod)*(modinv(factmod(n-r,mod),mod)))%mod;
    return ans;
}
ll ncr(ll n,ll r){if(n==1 || r==0)return 1;if(r>n/2)r=n-r;
    ll ans=1;for(ll i=1;i<=r;i++){ans=((ans * n )/i);n--;}return ans;
}
bool isprime(ll n){if(n==1 || (n!=2 && n%2==0))return false; if(n==2)return true; 
        for(ll i=3;i<=sqrt(n);i+=2)if(n%i==0)return false; return true; }
bool func(pair<ll,ll> &a,pair<ll,ll> &b ){
    if(a.ff != b.ff)return a.ff < b.ff;
    return a.ss > b.ss;
}
void solve(){
    ll i,j,l,m,x,y,z,r;
    cin>>n;
  double ans=2.0*3.1415927*(double)n;
  cout<<fixed<<setpricision(10)<<ans;
}
int main(){
    // FS;
    ll i,j,k,n,m,x,y,z,q;
    q=1;
	// cin>>q;
    while(q--){
        solve();
    }
    return 0;
}


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

#include<bits\stdc++.h>
using namespace std;
int main()
{
    int r;
    cin>>r;
    double p;
    p=acos(-1);
    cout<<setprecision(20)<<2*p*r<<"\n";
    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int r;
    cin>>r;
    double p;
    p=acos(-1);
    cout<<setprecision(20)<<2*p*r<<"\n";
    return 0;
}


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

#include <iostream>

using namespace std;

int main()
{
    int r;
    double obim;
    cin >> r;
    obim = 2*r*3.14;
    cout << obim << 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;
    float circum = 2.0 * 3.14159 * (float)R;
    cout << circum << 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;
    float circum = 2 * 3.14159 * (float)R;
    cout << circum << endl;
    return 0;
}

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

#include<iostream>
using namespace std;

int main(){
	int n, m, a;
  	cin>>n>>m;
  	for(int i = 0; i<m; i++){
		cin>>a;
     	sum += a;
    }
  
  	if(sum <= n){
		cout<<(n - sum)<<endl;
    }else{
		cout<<-1<<endl;
    }
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'sum' was not declared in this scope
    9 |         sum += a;
      |         ^~~
a.cc:12:12: error: 'sum' was not declared in this scope
   12 |         if(sum <= n){
      |            ^~~
Language: C

#include<iostream>
using namespace std;

double phi = 3.14159265359;

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

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

#include<iostream>
using namespace std;

int main(){
    double pi=3.1415;
    cin>>n;
    cout<<n*2*pi<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:10: error: 'n' was not declared in this scope
    6 |     cin>>n;
      |          ^
Language: C++

#include <bits/stdc++.h>

#define rep(i, N) for (ll i = 0; i < N; i++)
#define rep1(i, N) for (ll i = 1; i <= N; i++)
#define repr(i, N) for (ll i = N-1; i >= 0; i--)
#define repr1(i, N) for (ll i = N; i > 0; i--)

#define INF 1000000007

using ll = long long;
using namespace std;

typedef pair<int,int> P;

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

    cout << 2＊N*M_PI << endl;
    //cout << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:13: error: unable to find numeric literal operator 'operator""\U0000ff0aN'
   19 |     cout << 2＊N*M_PI << endl;
      |             ^~~~
Language: C

#include <iostream>

int main(int argc, char *argv[])
{
  double val = 0.;
  std::cin >> val;
  std::cout << val * 2. * 3.14 << std::endl;
  return 0;
}


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

#include<iostream>
#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define ll long long
#define N 2*10e5
#define pi  3.141592
using namespace std;
void get(ll arr[],ll n){for(ll i=0;i<n;i++) cin>>arr[i];}
int main()
{
 	ios::sync_with_stdio(0);
	cin.tie(0);
	ll r;
	cin>>r;
	float c = 2*pi*r;
	cout<<fixed<<setprecision(3)<<c;
}



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

#include <stdio.h>
#include <stdlib.h>
#define max 2*100000

int bossy(int x,int n,int boss[])
{
    int dabang=0;

    for(int j=1;j<n;j++)
    {
        if(boss[j]==x)dabang++;
    }
    printf("%d ",j);
    return dabang;
}
int main()
{
   int n,i,boss[max];
   scanf("%d",&n);
   for(i=1;i<n;i++)
   {
       scanf("%d",&boss[i]);
   }
   for(i=1;i<=n;i++)
   {
       printf("%d\n",bossy(i,n,boss));
   }
    return 0;
}


Compiler output:
main.c: In function 'bossy':
main.c:13:18: error: 'j' undeclared (first use in this function)
   13 |     printf("%d ",j);
      |                  ^
main.c:13:18: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
#include<conio.h>
int main()
{
  float r;
  scanf("%f",&r);
  printf("%f",(2*3.142*r));
  return 0;
}
  

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

#include <bits/stdc++.h>
using namespace std;
#define vi vector<int>
#define pi pair<int,int>
#define ll long long
#define rep(i,a,b) for(int i=int(a); i<=int(b);i++)
#define repv(vec,v) for(v=(vec).begin(); v!=(vec).end();v++)
#define sz(vec) (int)(vec).size()
#define PB push_back
#define F first
#define S second

void solve(){
	
}


int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	double r; cin >> r;
	cout << 2*r*M_PI;

	
	return 0;
}


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

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

int main() {
  int R;
  cin>>R;
  
  
  
  
  cout<<3.14159265*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 <bits/stdc++.h>
using namespace std;

int main() {
  int R;
  cin>>R;
  
  
  
  
  cout<<3.14159265*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

//Codes by: Umar Bin Qamar

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

bool compare(int a,int b){
    return a>b;
}
;
int32_t main(){


  int n,m;
  scanf("%d%d",&n,&m);
  int arr[m];
  for(int i=0;i<m;i++){
    scanf("%d",&arr[i]);
  }
  int count=0;
for(int i=0;i<m;i++){
    count=count+arr[i];
}
if(count>n){
    printf("-1\n");
}
else{
    printf("%d\n",n-count);
}
    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>
using namespace std;



int main() {
 int R;
 cin>>R;
 double X=3.14159265358979323846*R*2;
  cout << fixed << setprecision(20);
  cout<<X<<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 ll long long 
#define endl "\n"
#define pb push_back
#define f(i,n) for(i=0;i<n;i++)
#define F(i,a,b) for(i=a;a<=b;i++)
#define arr(a,n) for( i=0;i<n;i++)cin>>a[i];
#define fi first
#define se second
#define mp make_pair
#define mod 1000000007
#define YES cout<<"YES"<<endl;
#define Yes cout<<"Yes"<<endl;
#define NO cout<<"NO"<<endl;
#define No cout<<"No"<<endl;
#define yes cout<<"yes"<<endl;
#define no cout<<"no"<<endl;
#define vi vector<ll>
#define ed end()
#define bg begin()
#define sz size()
#define ln length()
#define s() sort(a,a+n);
#define sr() sort(a,a+n,greater<ll>());
#define v()  sort(v.begin(),v.end());
#define vr() sort(v.begin(),v.end(),greater<ll>());
#define mod 1000000007
#define fast() ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
ll gcd(ll a, ll b){if(!b)return a;return gcd(b, a % b);}
ll power(ll x,ll y,ll p){ll res=1;x%=p;while(y>0){if(y&1)res=(res*x)%p;y=y>>1;x=(x*x)%p;}return res;}
int main() {
    /*#ifndef ONLINE_JUDGE
        // for getting input from input.txt
        freopen("input.txt", "r", stdin);
        // for writing output to output.txt
        freopen("output.txt", "w", stdout);
    #endif*/
        /* 
        Ofcourse it's Hard.
        It's supposed to be Hard.
        If it's easy everyone would do it.
        HARD IS WHAT MAKES IT GREAT

        YESTERDAY U SAID TOMORROW

        SLOWLY BECOMING THE PERSON I 
        SHOULD HAVE BEEN A LONG TIME AGO

        SAME TASK CAN'T BE FOUND DIFFICULT TWICE

        BTBHWSITW

        SPRH TU KAB P

        CP IS ALL ABOUT THINKING 
        YOU HAVE MUCH MORE POTENTIAL THAN U THINK

        AJIT SHIDDAT 10

        UR DAILY ROUTINE 


        */

fast();
//ll t;cin>>t;while(t--)
{
    ll r;
    cin>>r;
    double d=22/double(7);
    ///cout<<d<<endl;
    cout<<2*r*d<<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: Java

import java.util.Scanner;
public class ensyuu
{
 public static void main(String[] args){
     Scanner sc = new Scanner(System.in);
     int a = sc.nextInt();
     double b = 2*a*3.14;
     System.out.println(b);
    }
}

Compiler output:
Main.java:2: error: class ensyuu is public, should be declared in a file named ensyuu.java
public class ensyuu
       ^
1 error
Language: C

#include <iostream>
using namespace std;
int main(){
  double r;
  cin >> r;
  cout << 2 * r * 3.1415926535 << "\n";
  return 0;
}



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

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

int main()
{
	int num=0,a=0,b=0,c=0;
	cin>>num;

    a = num/100;  
    b = (num-a*100)/10; 
	c = num-a*100-b*10;
	if(a==7||b==7||c==7)
	cout<<"Yes";
	else
	cout<<"No";
	
	return 0;
}

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

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <limits>
#include <iomanip>
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
#define L(ID) ((ID*2)+1)
#define R(ID) ((ID*2)+2)
#define M(L,R) ((L+R)/2)
#define forr(start,end) for(int i = start; i < end; i++)
#define gap ' '

const int MAXN = 200;
//ll a[MAXN], ST[MAXN * 4], LZ[MAXN*4];

/*bool perfectSquare(ll x){
    ll s = sqrt(x);
    if(s *s == x) return true;
    else return false;
}*/
typedef long double ld;

int main() { 
    ll r = 0;
    cin >> r;
    ld p = 3.14159;
    cout << setprecision(10) << r*2*p << endl;
  
    return 0; 
} 


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

#include <bits/stdc++.h>
using namespace std;
#define ll long long 
#define endl "\n"
#define pb push_back
#define f(i,n) for(i=0;i<n;i++)
#define F(i,a,b) for(i=a;a<=b;i++)
#define arr(a,n) for( i=0;i<n;i++)cin>>a[i];
#define fi first
#define se second
#define mp make_pair
#define mod 1000000007
#define YES cout<<"YES"<<endl;
#define Yes cout<<"Yes"<<endl;
#define NO cout<<"NO"<<endl;
#define No cout<<"No"<<endl;
#define yes cout<<"yes"<<endl;
#define no cout<<"no"<<endl;
#define vi vector<ll>
#define ed end()
#define bg begin()
#define sz size()
#define ln length()
#define s() sort(a,a+n);
#define sr() sort(a,a+n,greater<ll>());
#define v()  sort(v.begin(),v.end());
#define vr() sort(v.begin(),v.end(),greater<ll>());
#define mod 1000000007
#define fast() ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
ll gcd(ll a, ll b){if(!b)return a;return gcd(b, a % b);}
ll power(ll x,ll y,ll p){ll res=1;x%=p;while(y>0){if(y&1)res=(res*x)%p;y=y>>1;x=(x*x)%p;}return res;}
int main() {
   /* #ifndef ONLINE_JUDGE
        // for getting input from input.txt
        freopen("input.txt", "r", stdin);
        // for writing output to output.txt
        freopen("output.txt", "w", stdout);
    #endif*/
        /* 
        Ofcourse it's Hard.
        It's supposed to be Hard.
        If it's easy everyone would do it.
        HARD IS WHAT MAKES IT GREAT

        YESTERDAY U SAID TOMORROW

        SLOWLY BECOMING THE PERSON I 
        SHOULD HAVE BEEN A LONG TIME AGO

        SAME TASK CAN'T BE FOUND DIFFICULT TWICE

        BTBHWSITW

        SPRH TU KAB P

        CP IS ALL ABOUT THINKING 
        YOU HAVE MUCH MORE POTENTIAL THAN U THINK

        AJIT SHIDDAT 10

        UR DAILY ROUTINE 


        */

fast();
//ll t;cin>>t;while(t--)
{
    ll r;
    cin>>r;
    cout<<2*3.14*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;
#define rep(i,n) for(int i=0;i<(int)(n);++i)
#define ll long long
#define P pair<int,int>

int main(){
    const double pi=3.14159265;
    int r;
    cin>>r;
    cout<<setprecision(10)<<2*r*pi<<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

<?php
list($X)=sscanf(trim(fgets(STDIN)),"%d");
print($X*2*pi());

Compiler output:
main.c:1:1: error: expected identifier or '(' before '<' token
    1 | <?php
      | ^
main.c:3:7: error: unknown type name '$X'
    3 | print($X*2*pi());
      |       ^~
Language: C

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

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>x;
	_P("%.12lf\n",x*atan(1)*8);
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); 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

<?php
list($X)=sscanf(trim(fgets(STDIN)),"%d");
print($X*pi());

Compiler output:
main.c:1:1: error: expected identifier or '(' before '<' token
    1 | <?php
      | ^
main.c:3:7: error: unknown type name '$X'
    3 | print($X*pi());
      |       ^~
Language: C++

int main(){
int n;
cin >> n;
vector<int>a,ans;
for(int i=2;i<=n;i++) cin >> a.at(i);
for(int i=2;i<=n;i++) ans.at(a.at(i))++;
for(int i=1;i<=n;i++) cout << ans.at(i) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:3:1: error: 'cin' was not declared in this scope
    3 | cin >> n;
      | ^~~
a.cc:4:1: error: 'vector' was not declared in this scope
    4 | vector<int>a,ans;
      | ^~~~~~
a.cc:4:8: error: expected primary-expression before 'int'
    4 | vector<int>a,ans;
      |        ^~~
a.cc:5:30: error: 'a' was not declared in this scope
    5 | for(int i=2;i<=n;i++) cin >> a.at(i);
      |                              ^
a.cc:6:23: error: 'ans' was not declared in this scope
    6 | for(int i=2;i<=n;i++) ans.at(a.at(i))++;
      |                       ^~~
a.cc:6:30: error: 'a' was not declared in this scope
    6 | for(int i=2;i<=n;i++) ans.at(a.at(i))++;
      |                              ^
a.cc:7:23: error: 'cout' was not declared in this scope
    7 | for(int i=1;i<=n;i++) cout << ans.at(i) << endl;
      |                       ^~~~
a.cc:7:31: error: 'ans' was not declared in this scope
    7 | for(int i=1;i<=n;i++) cout << ans.at(i) << endl;
      |                               ^~~
a.cc:7:44: error: 'endl' was not declared in this scope
    7 | for(int i=1;i<=n;i++) cout << ans.at(i) << endl;
      |                                            ^~~~
Language: C

R=input()
  i=R*3.141592
  print(i)

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | R=input()
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'R' [-Wimplicit-int]
main.c:1:3: error: implicit declaration of function 'input' [-Wimplicit-function-declaration]
    1 | R=input()
      |   ^~~~~
main.c:1:3: error: initializer element is not constant
main.c:2:3: error: expected ',' or ';' before 'i'
    2 |   i=R*3.141592
      |   ^
Language: C++

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

#define int long long
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define rep(i, n) for (int i = 0; i < n; ++i)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define range(i,a,b) ((a)<=(i) && (i)<(b))
#define debug(x) cout << #x << " = " << (x) << endl;
#define fs first
#define sc second
#define pb push_back
#define eb emplace_back
#define SP << " " <<

typedef long long ll;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> T;
typedef vector<ll> vec;
typedef vector<P> pvec;
typedef vector<vector<ll>> vvec;
typedef vector<vector<P>> pvvec;
typedef priority_queue<ll> PQI;
typedef priority_queue<P> PQP;
typedef priority_queue<ll,vector<ll>,greater<ll>> PQIG;
typedef priority_queue<P,vector<P>,greater<P>> PQPG;

const vector<int> dx = {0, -1, 0, 1, 1, 1, -1, -1};
const vector<int> dy = {1, 0, -1, 0, 1, -1, 1, -1};
constexpr int MOD = (1000000007);
// const int MOD = (998244353);
// const int INF = (1 << 30); // 1073741824
const int INF = (1LL << 60); // 1152921504606846976
const double EPS = (1 >> 30);

template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b; return 1;} return 0;}
template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b; return 1;} return 0;}
template<class T> inline T ceil(T a, T b) {return T((a + b - 1) / b);}
template<class T> inline T round(T a, T b) {return T(a / b);}
template< typename T1, typename T2 > istream &operator>>(istream &is, pair< T1, T2 > &p) { is >> p.first >> p.second; return is; }

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

int nmax=200000; // 2*(10^5)
vvec g(nmax);


void solve()
{
    
    
    
}

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

void main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(15);

    int repeat = 1;
    //cin >> repeat;
    while(repeat--){
        solve();
    }

}

Compiler output:
a.cc:59:1: error: '::main' must return 'int'
   59 | void main()
      | ^~~~
Language: C

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

const double PI = 3.141592653;

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

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

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

int main() {
    double a;
    cin >> a;
    cout << 2*a*3.14159 << endl;
}


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

<?php
list($X)=sscanf(trim(fgets(STDIN)),"%d");
print($X*pi()*2);

Compiler output:
main.c:1:1: error: expected identifier or '(' before '<' token
    1 | <?php
      | ^
main.c:3:7: error: unknown type name '$X'
    3 | print($X*pi()*2);
      |       ^~
Language: C++

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

int main()
{
	long double r;
  	cin>>r;
  	long long double c=2.0*3.142*r;
  	cout<<r;
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'long long' specified with 'double'
    8 |         long long double c=2.0*3.142*r;
      |              ^~~~
Language: C

#include <iostream>
using  namespace std;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    double r,cir;
    double PI  =3.141592653589793238463;
    cin>>r;
    cir=2*PI*r;
    cout<<cir<<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 ll long long

int main()
{
    int r;
    cin>>r;
    cout<<6.28*r;
    return 0;
}


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

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

int main()
{
	long long double r;
  	cin>>r;
  	long long double c=2.0*3.142*r;
  	cout<<r;
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:14: error: 'long long' specified with 'double'
    6 |         long long double r;
      |              ^~~~
a.cc:8:14: error: 'long long' specified with 'double'
    8 |         long long double c=2.0*3.142*r;
      |              ^~~~
Language: C

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

int main()
{
	long long double r;
  	cin>>r;
  	long long double c=2.0*3.142*r;
  	cout<<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

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

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>
#define rep(i,n) for(int (i)=0;(i)<(int)(n);(i)++)
#define repeq(i,n) for(int (i)=0;(i)<=(int)(n);(i)++)
#define rep1(i,x,n) for(int (i)=(x);(i)<(int)(n);(i)++)
#define rep1eq(i,x,n) for(int (i)=(x);(i)<=(int)(n);(i)++)
#define rrep(i,x) for(int i=((int)(x)-1);i>=0;i--)
using namespace std;
using ll = long long;
using Int = long long;

const int MOD = 1000000007;
const ll INF = numeric_limits<ll>::max();
const int inf = 1e8;
typedef pair<int,int> P;
typedef std::priority_queue<int> IntPrioQueue;
typedef std::priority_queue<int, std::vector<int>, std::greater<int> > IntReversePrioQueue;

//少数点表示
//cout << std::fixed << std::setprecision(14) << 値

int main(){
    cin.tie( 0 ); ios::sync_with_stdio( false );
    double r;
    cin >> r;
    cout << std::fixed << std::setprecision(2) << r*2*3.14;

}

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_base::sync_with_stdio(false);
    cin.tie(NULL);
    double r,cir;
    double PI  =3.141592653589793238463;
    cin>>r;
    cir=2*PI*r;
    cout<<cir<<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

// https://atcoder.jp/contests/abc163/tasks/abc163_a

#include "algorithm"
#include "bitset"
#include "cmath"
#include "functional"
#include "iomanip"
#include "iostream"
#include "map"
#include "numeric"
#include "queue"
#include "set"
#include "string"
#include "vector"
#define rep(i, to) for (ll i = 0; i < (to); ++i)
#define rep1(i, to) for (ll i = 1; i <= (to); ++i)
#define repf(i, from, to) for (ll i = from; i < (to); ++i)
#define repr(i, from) for (ll i = from - 1; i >= 0; --i)
#define all(vec) vec.begin(), vec.end()
#define unless(cond) if (!(cond))
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef long double ld;
template <typename T>
using V = vector<T>;
using VL = V<ll>;
using VVL = V<VL>;
template <typename T, typename U>
using P = pair<T, U>;
using PL = P<ll, ll>;
using VPL = V<PL>;

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

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

struct exit_exception : public std::exception {
  const char* what() const throw() { return "Exited"; }
};

template <typename T>
void drop(T res) {
  cout << res << endl;
  throw exit_exception();
}

const ll INF = 1e18;

void solve();

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

  try {
    solve();
  } catch (exit_exception& e) {
  }

  return 0;
}
#endif

const ld PI = 3.141592653589793238462643383279;

void solve() {
  ll R;
  cin >> R;

  ld res = 2 * PI * R;
  cout << fixed << setprecision(20) << res << endl;
}


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

#include <bits/stdc++.h>
using namespace std;
 
    
    
int main(){
  int r;
  double x;
  cin>>r;
  x=2*3.14159265358979*r;
  cout<<x<<endl;
    return 0;
}

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

#include <iostream>

using namespace std;
 
    
    
int main(){
  int r;
  double x;
  cin>>r;
  x=2*3.14159265358979*r;
  cout<<x<<endl;
    return 0;
}

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

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) FOR(i, 0, (n))
#define FOR(i, a, b) for(int i=(a); i<(b); i++)
#define LAR(a, b) ((a)=max((a),(b)))
#define SML(a, b) ((a)=min((a),(b)))
using ll = long long;
using ld = long double;
using vi = vector<int>;
using vl = vector<ll>;
using pii = pair<int, int>;
using vpii = vector<pair<int, int>>;
template<typename T>
using pque = priority_queue<T, vector<T>, greater<T>>;
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define ALL(a) (a).begin(), (a).end()
#ifdef LOCAL_DEBUG
#define DEBUG(...) printf(__VA_ARGS__)
#else
#define DEBUG(...)
#endif

int main(){
	ld r; scanf("%Lf", &r);
	printf("%.30Lf\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;

#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds; 

#define ll long long
#define db double
#define el "\n"
#define ld long double
#define rep(i,n) for(int i=0;i<n;i++)
#define rev(i,n) for(int i=n;i>=0;i--)
#define rep_a(i,a,n) for(int i=a;i<n;i++)
#define tr(ds, it) for(auto it=ds.begin(); it!=ds.end(); it++)
#define rtr(ds, it) for(auto it=ds.rbegin(); it!=ds.rend(); it--)
#define all(ds) ds.begin(), ds.end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
typedef priority_queue <int> pq;
typedef vector< long long > vi;
typedef pair<long long, long long> ii;
#define o_set tree<ll, null_type,less<ll>, rb_tree_tag,tree_order_statistics_node_update> 
#define graph vector<vi>

const ll MAX = 1000001;
const ll mod = 1000000007;
ll po(ll x, ll n ){ 
	ll ans=1;
     while(n>0){
     	if(n&1) ans=(ans*x)%mod;
     	x=(x*x)%mod;
     	n/=2;
     }
     return ans;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	#ifndef ONLINE_JUDGE
	//reopen("input.txt", "r" , stdin);
	//freopen("output.txt", "w" , stdout);
	#endif

	ll r;
	cin>>r;
	
	cout<<setprecision(20)<<2*M_PI*r;

	return 0;
}


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

#include<iostream>
using namespace std;

int main(){
       int R;
         cin>>R;
      
       const double pi=acos(-1.0);
      
       double answer=2*R*pi;
      
       	cout<<setprecision(20)<<fixed<<answer<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: 'acos' was not declared in this scope
    8 |        const double pi=acos(-1.0);
      |                        ^~~~
a.cc:12:15: error: 'setprecision' was not declared in this scope
   12 |         cout<<setprecision(20)<<fixed<<answer<<endl;
      |               ^~~~~~~~~~~~
a.cc:2:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    1 | #include<iostream>
  +++ |+#include <iomanip>
    2 | using namespace std;
Language: C

R = int(input("Enter value: "))
  if 1<= R >= 100
    result = 6.28*R
    print(result)
 

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | R = int(input("Enter value: "))
      | ^
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("Enter value: "))
      |     ^~~
Language: C++

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

int main(){
float radius, area;

cout << <<endl;

area = M_PI * radius * radius  
  
cout << area <<endl;  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: expected primary-expression before '<<' token
    8 | cout << <<endl;
      |         ^~
a.cc:10:30: error: expected ';' before 'cout'
   10 | area = M_PI * radius * radius
      |                              ^
      |                              ;
   11 | 
   12 | cout << area <<endl;
      | ~~~~
Language: C

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <map>
#include <numeric>
using namespace std;
typedef long long ll;

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    cout.precision(20);
    int n;cin>>n;
    cout<<double(2.0*M_PI*n);
    
}

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

#include <bits/stdc++.h>
using namespace std;
int main(){
    int R;
    cin >> R;
    double ans = R * 3.1415926535 * 2;
    cout << ans << endl;
}

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

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

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int r;
    cin >> r;
    cout << r*3.1415926*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: Java

function main(input){
	
  	var R;
	R = MATH.PI*input;
	return R;
}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
function main(input){
^
  (use --enable-preview to enable unnamed classes)
Main.java:1: error: <identifier> expected
function main(input){
                   ^
2 errors
Language: C

r = int(input())
print(2*r*3.1415926535)

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

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

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

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

#include<bits/stdc++.h>
#define rep(i,n) for(ll i=0;i<(n);++i)
#define sayyes cout<<"Yes"<<endl;
#define sayno cout<<"No"<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int>P;
const int mod =1e9+7;

int main()
{
    int n;
    cin>>n;
    cout<<(double)(2.0*n*3.1415);
    
}

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;

typedef long long ll;
#define pi a*cos(-1)
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    double r;
    cin>>r;
    double ans=2*pi*r;
    printf("%0.6lf\n",ans);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:12: error: 'a' was not declared in this scope
    5 | #define pi a*cos(-1)
      |            ^
a.cc:12:18: note: in expansion of macro 'pi'
   12 |     double ans=2*pi*r;
      |                  ^~
Language: C

#include<bits/stdc++.h>
using namespace std;
#define test while(t--)
#define pb push_back

int main()
{
    int r;
    cin>>r;
    double a=3.141592653589793*2*r;
    cout<<fixed<<setprecision(9)<<a;
}

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

#include <bits/stdc++.h>
#define rep(i,n) for(ll i=0;i<(n);++i)
#define sayyes cout<<"Yes"<<endl;
#define sayno cout<<"No"<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int>P;
const int mod =1e9+7;

int main()
{
    int n;
    cin>>n;
    cout<<(double)(2.0*n*3.1415);
    
}

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;
using ll = long long;
template <class T, class U> using Pa = pair<T, U>;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    double R;
    cin >> R;
    cout << fixed << setprecision(10) << R*6.2831853071795 << "\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;

typedef long long ll;
#define pi a*cos(-1)
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    double r;
    cin>>r;
    double ans=2*pi*r;
    printf("%0.6lf\n",ans);
    return 0;
}


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

#pragma GCC optimize("Ofast",3,"inline")
#include<bits/stdc++.h>
using namespace std;
#define fir first
#define sec second
#define m_p make_pair
#define y1 ygftgfgcdtfgxffgx
#define y2 yfdsesgvtyghftfvv
#define x1 xvyr6cf6fgcfgf676
#define x2 xcr6rfc5r66y6r6fr
#define up_bound upper_bound
#define low_bound lower_bound
#define next_per next_permutation
#define pb push_back
#define i_to_s to_string
typedef priority_queue<int> p_queue;
typedef priority_queue<int, vector<int>, greater<int> > min_p_queue;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
int mon[20]={31,28,31,30,31,30,31,31,30,31,30,31};
ll gcd(ll x,ll y){return ((y==0)?x:gcd(y,x%y));}
const double PI=3.1415926535897932384626;
double r,C;
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
//	freopen(".in","r",stdin);
//	freopen(".out","w",stdout);
	cin>>r;
	C=r*2*PI;
	printf("%.15lf",C);
	return 0;
}


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

#include <bits/stdc++.h>

#define nl '\n'
#define F fisrt
#define S second
#define pb push_back
#define mp make_pair
#define REP(i,a,b) for(int i = a; i < b; i++)
#define ForeachTC int t; cin >> t; while(t--)
using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef stack<int> si;
typedef deque<int> di;
typedef pair<int,int> pi;

class Solution {
public:
    int climbStairs(int n) {
		if(n <= 2)
			return n;
		else{
			return climbStairs(n-1) + climbStairs(n-2);
		}
    }
};

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	//code here
	float r; cin >> r;
	cout << 2*M_PI*r;
}


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

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

using namespace std;
using namespace __gnu_pbds;

using ll = long long;
using ull = unsigned long long;
using vl = vector<ll>;
using vi = vector<int>;
using vchar = vector<char>;
using vstr = vector<string>;
using pll =  pair<ll,ll>;

const ll mod = 1000000007;
const ll inf = 1000000000000000;

#define pi acos(-1)
#define pb push_back
#define test int TEST;cin>>TEST;while(TEST--)
#define vsort(xx) sort(xx.begin(),xx.end())
#define vrevsort(xx) sort(xx.rbegin(),xx.rend())


int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    int r;cin>>r;
  cout<<2*pi*r;
   
    return 0;
}




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

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

int main(){
  int A,B;
  cin>>A;
  int N[A-1];
  int M[A]={};
  for(int i = 0;i < A-1;i++){
    cin>>N[i];
    M[N[i]]++;
  }
  for(int i  = 0;i < A:;i++)cout<<M[i]<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:18: warning: range-based 'for' loops with initializer only available with '-std=c++20' or '-std=gnu++20' [-Wc++20-extensions]
   13 |   for(int i  = 0;i < A:;i++)cout<<M[i]<<endl;
      |                  ^
a.cc:13:23: error: expected ';' before ':' token
   13 |   for(int i  = 0;i < A:;i++)cout<<M[i]<<endl;
      |                       ^
      |                       ;
a.cc:13:28: error: expected ';' before ')' token
   13 |   for(int i  = 0;i < A:;i++)cout<<M[i]<<endl;
      |                            ^
      |                            ;