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

#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define vll vector<ll>
#define vllv vector<vector<ll>> 
#define sz size()
#define pb push_back
#define ff first
#define ss second
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
ll fact(ll n){ll s=1; for(ll i=1;i<=n;i++)s*=i; return s;}
ll ceil1(ll n,ll m){if(n%m==0){return n/m;}return n/m +1;}
vll factor(ll n){
    vll ans;
    if(n>0)ans.pb(1);if(n==2)ans.pb(2);
    for(ll i=2;i*i<=n;i++){if(n%i==0){ans.pb(i);if(n/i!=i)ans.pb(n/i);}}if(n>2)ans.pb(n);
    return ans;
}
ll nCr(ll n, ll r) 
{ 
    return fact(n) / (fact(r) * fact(n - r)); 
} 
void dfs(vllv &v,ll k,vll &par,vll &dis,ll p)
{
 
    par[k]=p;
    dis[k]=dis[p]+1;
    for(ll i=0;i<v[k].sz;i++){
        if(v[k][i]!=p){
            dfs(v,v[k][i],par,dis,k);
        }
    }
}
bool sortbysec(const pair<int,int> &a,const pair<int,int> &b){return (a.second<b.second);} 


void solve()
{
    double n;
    cin>>n;
    cout<<2.0*3.14159265358979323846*n;
    return;
}

int main()
{
    ll 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;

#define ll                      long long
#define pii                     pair<int, int>
#define pli                     pair<ll, int>
#define pil                     pair<int, ll>
#define pll                     pair<ll, ll>
#define vi                      vector<int>
#define vll                     vector<ll>
#define vb                      vector<bool>
#define vd                      vector<double>
#define vs                      vector<string>
#define ff                      first
#define ss                      second
#define pb                      push_back
#define eb                      emplace_back
#define ppb                     pop_back
#define pf                      push_front
#define ppf                     pop_front
#define vpii                    vector<pii>
#define umap                    unordered_map
#define all(x)                  x.begin(),x.end()
#define clr(a,b)                memset(a,b,sizeof a)
#define fr(i, n)                for(int i=0; i<n;++i)
#define fr1(i, n)               for(int i=1; i<=n; ++i)
#define rfr(i, n)			    for(int i=n-1; i>=0; --i)
#define precise(x)              cout<<fixed<<setprecision(x)
#define wh						while
#define mp						make_pair
#define le						length()
#define M						1000000007


void solve()
{
	float ans=6.28318530717958623200;
float r;
cin>>r;
cout<<ans*r<<endl;

}


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

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

#include<bits/stdc++.h>
using namespace std;    
#define ll long long
int main(){
    ios::sync_with_stdio(false) ,cin.tie(0);
    int r;
    cin >> r;
    cout << 2.0*3.14*r;
}



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

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

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

    cout << 3.1415 * r * 2.0 << endl;
    return 0;
}

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

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

double R;

int main() {
    cin>>R;
    cout<<2*R*3.141<<endl;
    return 0;
}


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

#include <bits/stdc++.h>
#define fi first
#define se second
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define maxs(x,y) (x = max(x,y))
#define mins(x,y) (x = min(x,y))
#define limit(x,l,r) max(l,min(x,r))
#define lims(x,l,r) (x = max(l,min(x,r)))
#define isin(x,l,r) ((l) <= (x) && (x) < (r))
#define pb push_back
#define eb emplace_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcountll
#define uni(x) x.erase(unique(rng(x)),x.end())
#define show(x) cout<<#x<<" = "<<x<<endl;
#define print(x)cout<<x<<endl;
#define PQ(T) priority_queue<T,v(T),greater<T> >
#define bn(x) ((1<<x)-1)
#define dup(x,y) (((x)+(y)-1)/(y))
#define newline puts("")
#define v(T) vector<T>
#define vv(T) v(v(T))
using namespace std;
typedef long long int ll;
typedef unsigned uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef tuple<int,int,int> T;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<P> vp;
typedef vector<T> vt;

int main() {
  double d;
  cin>>d;
  double ans = 2*d*3.1415926535;
  printf("%.10f\n",ans);
  return 0;
}

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


// Problem : A - Circle Pond
// Contest : AtCoder - AtCoder Beginner Contest 163
// URL : https://atcoder.jp/contests/abc163/tasks/abc163_a
// Memory Limit : 1024 MB
// Time Limit : 2000 ms
// Powered by CP Editor (https://github.com/cpeditor/cpeditor)

#pragma GCC optimize("O3")  
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define pii pair<int,int>
#define S second
#define endl "\n"
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) (a*b)/gcd(a,b)
#define mem(z,i) memset(z,i,sizeof(z))
#define eps 1e-7
#define I (int)
#define mod 1000000007
#define YES "YES"
#define NO "NO"
const long long INF = 1000000000000000000LL;
//const int WASTE=∞;
ll power(ll a,ll b){
	ll i=1;
	while(b){
		if(b%2)
			i=(i*a)%mod;
		b/=2;
		a=(a*a)%mod;
	}
	return i;
}
ll mulmod(ll a, ll b) { 
    ll res = 0;
    a = a % mod; 
    while (b > 0) {
        if (b % 2 == 1) 
            res = (res + a) % mod; 
        a = (a * 2) % mod; 
        b /= 2; 
    }
    return res % mod; 
} 
const int N=1e5+5;
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
  	cout<<fixed;
  	cout.precision(10);
   	int b;
   	cin>>b;
   	double ans=b*2*3.14;
   	cout<<ans;
   	
   	
   	
   	
   	
   	
   	
   	
   	
   	
   	
  	return 0;
}



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

#include <iostream>
using namespace std;

#include <algorithm>
#include <iomanip>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>

int main() {

    long long int r;
    cin >> r;

    cout << fixed << setprecision(10) << 3.14159265358979L * 2 * r << endl;

    return 0;

}


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

#include <bits/stdc++.h>

using namespace std;

int main(){
    long double R;
    cin >> R;
    cout << setprecision(20) << 2.0000000000*R*3.1415926535 << endl;
}

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

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

typedef long long LL;

#define REP(i, n) for(int i = 0; i < (int)(n); i++)
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define ALL(x) (x).begin(),(x).end()
const int IINF = 1e9;
const LL LINF = 1e18;
const LL MOD = 1e9+7;

int main() {
    double R;
    cin >> R;
    printf("%.5f\n", 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;
#define ll long long
#define pi 2*acos(0.0)
#define f first
#define s second
#define pb push_back
#define gap ' '
#define fastio {ios_base::sync_with_stdio(false);cin.tie(NULL);}
#define mod 1000000007

int main()
{
    double r;
    cin>>r;
    double ans=2*pi*r;
    cout<<setprecision(10)<<fixed<<ans<<endl;
}


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

//Author: kaiyu
#include <iostream>
#include <algorithm>
#include <cmath>
#include <map>
#include <vector>
#include <set>
#include <unordered_map>
#include <cstring>
#include <string>
#include <queue>
#include <stack>
#include <numeric>
#include <iomanip>
using namespace std;
typedef long long ll;
#define sz(x) ((long long)(x).size())
#define all(x)  x.begin(),x.end()
#define ff first
#define ss second
#define mp make_pair
#define pb push_back
#define setbits(x)      __builtin_popcountll(x)
#define zrobits(x)      __builtin_ctzll(x)
#define mod             1000000007
#define vi vector<ll>
#define vvi vector<vector<ll>>
#define pii pair<int,int>
#define endl "\n"
#define tt ll tc;cin >> tc;while(tc--)
#define int3(x,y,z) ll x,y,z;cin >> x >> y >> z;
#define int2(x,y) ll x,y;cin >> x >>y;
#define int1(x) ll x;cin>>x;
#define  fio ios::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
bool cm(pair<string,int>p1,pair<string,int>p2) {
    return p1.ss > p2.ss;
}
#define int long long

int par[100005],n,m;

int find(int a) {
    if(par[a] < 0) {
        return a;
    }
    else return par[a] = find((par[a]));
}

void xunion(int a, int b) {

    par[a] = min(par[a],par[b]);
    par[b] = a;
}
int32_t main() {
    int r;
    cin >> r;

    double x = 2 * r *  3.141592653589793238;
    cout << x << endl;
        return 0;
}




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

#!/usr/bin/env python3
from math import pi
R = int(input())
print(R * 2 * pi)

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #!
    1 | #!/usr/bin/env python3
      |  ^
a.cc:2:1: error: 'from' does not name a type
    2 | from math import pi
      | ^~~~
Language: C

//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define all(v) v.begin(), v.end()
#define allr(v) v.rbegin(), v.rend()



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

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

/*
 It's better to sleep happy and tired rather than disappointed and frustrated
 There's only 1 thing that's impossible and that is defeating a man who doesn't give up
*/
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define mx2 102
#define mx3 1003
#define mx4 10004
#define mx5 100005
#define mx6 1000006
#define mod 1000000007
#define PI 3.14159265
#define deb(x) cout << #x << " " << x << endl;
#define fo(i,n) for(int i=0 ; i<n ; i++)
#define Fo(i,k,n) for(int i=k ; i<n ; i++)

typedef long long int ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<pair<int,int>,int> piii;

const int inf=0x3f3f3f3f;
int n , ans , sum , a , b ,arr[mx5];
string str;
 
int main() {
	ios::sync_with_stdio(false);
	//int t;cin>>t;while(t--)
	{
		double ans , r;
		cin>> r;
		ans = 2*r*PI;
		cout << fixed;
		cout << setprecision(6);
		cout << ans;
	}
	return 0;
}


Compiler output:
main.c:5:10: fatal error: bits/stdc++.h: No such file or directory
    5 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>
using namespace std;
	 
#define fast_io ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define cout_precision cout.setf(ios::fixed); cout.precision(32);
#define clr(a) memset(a,0,sizeof(a))
#define umap unordered_map
#define uset unordered_set
#define fr first
#define sc second
#define pb push_back
#define M int(1e9+7)
#define endl '\n'
	
using ll = int64_t; using vll = vector<ll>; using vvll = vector<vll>;
using pll = pair<ll, ll>; using vpll = vector<pll>; using vvpll = vector<vpll>;

int main(){
	fast_io; cout_precision;
	int r;	cin >> r;	cout << 2*3.14159*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

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

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

#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <stack>
#include <queue>
#include <map>
#include <algorithm>
#include <iomanip>
#include <math.h>
#include <string.h>
#include <cstdio>
#include <tuple>
using namespace std; using ll = long long; using pll = pair<ll, ll>;
using vl = vector<ll>; using vll = vector<vl>; using vpll = vector<pll>;
//**デバッグ準備**//
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail>
void debug_out(Head h, Tail... t) {
	cerr << " " << h;
	if (sizeof...(t) > 0) cerr << " :";
	debug_out(t...);
}
template <typename T>
ostream& operator<<(ostream& os, vector<T> vec) {
	for (size_t i = 0; i < vec.size(); i++)os << vec[i] << (i + 1 == vec.size() ? "" : " ");
	return os;
}
ll ctoi(char c) {
	switch (c) {
	case '0': return 0; case '1': return 1; case '2': return 2;
	case '3': return 3; case '4': return 4; case '5': return 5;
	case '6': return 6; case '7': return 7; case '8': return 8;
	case '9': return 9;  default: return 0;
	}
}
bool pairCompare(const pll firstElof, pll secondElof)
{
	return firstElof.first > secondElof.first;
}
//**Snippetリスト**//
//rep, vin, all, iteLoop//
//gcdlcm, isPrime, eratos, Npow, divisor, modinv, bitSearch, bitList, dfs, bfs//
//dijkstra, WarshallFloyd, BellmanFord, UnionFind, COM, digitDP ,RMQ//
ll i, j, k, l; ll N, M, K, H, W, L, X, Y, Z;
ll MOD = 1000000007; ll INF = 1LL << 60; ll ans = 0; ll z = 0, o = 1;
vl flag, color, D; vll path;
//***********//
int main() {
	double R;
	cin >> R;
	double PI = 3.14159265358979323846;
	R *= 2*PI;
	cout << fixed << setprecision(12) << R;
}

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
#define DL double
#define MLL map<LL,LL>::iterator
#define MSL map<string,L>::iterator
#define MLS map<LL,string>::iterator
#define MSS map<string,string>::iterator
#define MCL map<char,LL>::iterator
#define SL set<LL>::iterator
#define SS set<string>::iterator
#define VL V<LL>::iterator
#define G getline
#define SZ size()
#define IN insert
#define C clear()
#define B begin()
#define F front()
#define T top()
#define E end()
#define EM empty()
#define V vector
#define Q queue
#define DQ deque
#define PQ priority_queue
#define ST stack
#define FI first
#define MAX 1e18
#define MIN -1e18
#define SE second
#define PI acos(-1)
#define PS push
#define PP pop()
#define PSF push_front
#define PSB push_back
#define PPF pop_front()
#define PPB pop_back()
#define endl "\n"
#define FAST ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
V<LL>v;
map<LL,LL>u;
void Y()
{
    cout<<"Yes"<<endl;
}
void N()
{
    cout<<"No"<<endl;
}
int main()
{
    FAST;
    LL n,m,i,j,k,p,q,o,l,s,t,z=0,r;
    string a,b,c;
    DL x,y;
   cin>>x;
   cout<<fixed<<setprecision(12)<<2*PI*x<<endl;

    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define pb push_back
#define mp make_pair
#define fast ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
#define ff first
#define ss second
#define INF (ll) 1e9
#define endl "\n"
#define tt ll testcase; cin>>testcase; while(testcase--)
 
int main(){
	fast;
	ll n;
	cin>>n;
	double ans = 2*((double)n)*(3.14159);
	printf("%.4lf", ans);
}

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

#include <bits/stdc++.h>
#include <math.h>
using namespace std;
 
int main() {
  int H,A,B,N,R,M,K,X,Y,Z,C;
  string S,T,U;
  int N_tmp=0;
  cin >> R;
  

  cout << 2*M_PI*R << endl;
  return 0;
  


}

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

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

using ll = long long;
using vi = vector<int>;
using vll = vector<long long>;

int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};

constexpr long long mod = 1000000007;

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

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

    double r;
    cin >> r;

    r = 2 * 3.1415926535 * r;

    printf("%.4lf\n", r);
}

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

#include "bits/stdc++.h"
#define rep(i,n) for(int i = 0; i < (n); ++i)
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

const double PI = acos(-1);

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	double r;
	cin >> r;
	double ans = PI * 2 * r;
	cout << fixed << setprecision(12) << ans << endl;
	return 0;
}

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

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

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


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

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

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

    double ans = 3.14159265 * r * 2;

    cout << ans << endl;
}

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

//OPTIMIZATONS
#pragma GCC optimize("02")
//CODE
#include<bits/stdc++.h>
#define int long long
#define float double
#define endl "\n"
#define debug cout<<"Good uptill here"<<endl<<flush;
#define deb(x) cout<<#x<<":"<<x<<endl<<flush;

using namespace std;

int32_t main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	//CODE FOR SPECIFIED INPUT AND OUTPUT
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	double n;
	cin>>n;
	cout<<fixed<<setprecision(10)<<M_PI*n*2<<endl;
	return 0;
}



Compiler output:
main.c:4:9: fatal error: bits/stdc++.h: No such file or directory
    4 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>
#define fi first
#define se second
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define rng(a) a.begin(),a.end()
#define maxs(x,y) (x = max(x,y))
#define mins(x,y) (x = min(x,y))
#define limit(x,l,r) max(l,min(x,r))
#define lims(x,l,r) (x = max(l,min(x,r)))
#define isin(x,l,r) ((l) <= (x) && (x) < (r))
#define pb push_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcountll
#define uni(x) x.erase(unique(rng(x)),x.end())
#define snuke srand((unsigned)clock()+(unsigned)time(NULL));
#define show(x) cout<<#x<<" = "<<x<<endl;
#define PQ(T) priority_queue<T,v(T),greater<T> >
#define bn(x) ((1<<x)-1)
#define dup(x,y) (((x)+(y)-1)/(y))
#define newline puts("")
#define v(T) vector<T>
#define vv(T) v(v(T))
using namespace std;
typedef long long int ll;
typedef unsigned uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<P> vp;
inline int in() { int x; scanf("%d",&x); return x;}
template<typename T>inline istream& operator>>(istream&i,v(T)&v)
{rep(j,sz(v))i>>v[j];return i;}
template<typename T>string join(const v(T)&v)
{stringstream s;rep(i,sz(v))s<<' '<<v[i];return s.str().substr(1);}
template<typename T>inline ostream& operator<<(ostream&o,const v(T)&v)
{if(sz(v))o<<join(v);return o;}
template<typename T1,typename T2>inline istream& operator>>(istream&i,pair<T1,T2>&v)
{return i>>v.fi>>v.se;}
template<typename T1,typename T2>inline ostream& operator<<(ostream&o,const pair<T1,T2>&v)
{return o<<v.fi<<","<<v.se;}
template<typename T>inline ll suma(const v(T)& a) { ll res(0); for (auto&& x : a) res += x; return res;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
#define dame { puts("-1"); return 0;}
#define yn {puts("YES");}else{puts("NO");}
int dx[] = {0, 1, 0, -1}, dy[] = {1, 0, -1, 0};
//////////////////////////////////////////////////


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

int main() {
  
  int a;
  cin >> a;
  cout << 2*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>
#define f(i,j,k) for(int i=j;i<k;i++)
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: 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,b) for(i=0;i<b;++i)
            #define repp(i,a,b) for(i=a;i<b;++i)
            #define endl "\n"
            //#define LLONG_MAX 99999999999999
            typedef long long int lli;
            int main(){
                ios_base::sync_with_stdio(false);
                cin.tie(NULL);
                lli t,n,i,j,b,a,q,m;
                long double r;
                cin>>r;
                cout<<2.0*3.141*r<<endl;

            }



Compiler output:
main.c:1:21: fatal error: bits/stdc++.h: No such file or directory
    1 |             #include<bits/stdc++.h>
      |                     ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <iostream>
#include <math.h>
#include <algorithm>
#include <queue>
#include <map>
#include <list>
//#include <bits/stdc++.h>


using namespace std;

#define FOR(i,a,b) for(int i=(a),i##formax=(b);i<i##formax;i++)
typedef long long ll;

int main(){
    int R;
    double PI=3.14159265358979323846;
    cin >> R;


    cout << 2*R*PI<< endl;
    return 0;
}

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

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

#define fi first
#define se second
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define rrep(i,n) for (int i = 1; i < (n); ++i)
#define drep(i,n) for (int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define all(x) (x).begin(), (x).end()
#define maxs(x,y) (x = max(x,y))
#define mins(x,y) (x = min(x,y))
#define pb push_back
#define sz(x) (int)(x).size()
#define PQ(T) priority_queue<T, v(T), greater<T> >

using namespace std;
using ll = long long;
using uint = unsigned;
using ull = unsigned long long;
using P = pair<int,int>;

const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;

const int mod = 1000000007;

int main() {
    int r;
    cin >> r;
    printf("%.4lf\n",2*r*3.1415);
    return 0;
}





























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

// I SELL YOU...! 
#include<iostream>
#include<vector>
#include<algorithm>
#include<functional>
#include<queue>
#include<chrono>
#include<iomanip>
#include<map>
#include<set>
#include<cmath>
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
using TP = tuple<ll,ll,ll>;
void init_io(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << setprecision(18);
}
signed main(){
  init_io();
  ll r;
  cin >> r;
  cout << r*2*M_PI<<endl;
}


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

import math
R = float(input())
print(2.0 * math.pi * R)

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

#include <bits/stdc++.h>
#include <numeric>
#define rep(i,n) for (int i = 0; i < n; ++i)
#define rep1(i,n) for (int i = 1; i <= n; ++i)
template<typename T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<typename T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> P;
const long long MOD = 1e9+7;
template<typename T> inline void add(T& a, T b) { a += b; if (a >= MOD) a -= MOD; }

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

  long double r;
  cin >> r;
  long double ans = r * (long double)2 * 3.14159265358979323846;
  cout << std::fixed << std::setprecision(20) << ans << endl;
}


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

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

int main(){
  int n;
  cin>>n;
  double x;
  x=3.1415*2*n;
  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<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cstdlib>  
#include<cmath>   
#include<cctype>
#include<string>
#include<set>
#include<iomanip>
#include<map>
#include<algorithm>
#include<functional>
#include<vector>
#include<climits>
#include<stack>
#include<queue>
#include<list>
#include<deque>
#include<climits>
#include<typeinfo>
#include<utility>
#define LEN 100005
#define rep(i,n) for(int i=0;i<n;i++)
#define Rep(i,n) for(ll i=0;i<n;i++)
#define For(i,m,n) for(int i=m;i<n;i++)
#define FOR(i,m,n) for(ll i=m;i<n;i++)
using namespace std;
using ll = long long;
double pi() { return 3.14; }
int sum(int a, int b) { return a + b; }
int mul(int a, int b) { return a * b; }
ll LGCD(ll x, ll y) { if (x % y == 0) return y;else return LGCD(y, x % y); }
ll LLCM(ll x, ll y) { return x * y / LGCD(x, y); }

int GCD(int x, int y) { if (x % y == 0) return y;else return GCD(y, x % y); }
int LCM(int x, int y) { return x * y / GCD(x, y); }
ll dpc[10000][10000];

//void nCr(ll n, ll r) {
//	ll ans = 1;
//	for (int i = n; i > n - r; --i) {
//		ans = ans * i;
//	}
//	for (int i = 1; i < r + 1; ++i) {
//		ans = ans / i;
//	}
//	printf("%d",ans);
//}

ll combination(ll n, ll r) {
	if (n == r) { return dpc[n][n] = 1; }
	else if (r == 0) { return dpc[n][0] = 1; }
	else if (r == 1) { return dpc[n][1] = n; }
	else if (dpc[n][r]) { return dpc[n][r]; }
	else { return dpc[n][r] = combination(n - 1, r - 1) + combination(n - 1, r); }
}

//cout << fixed << setprecision(10);


int main() {

	int r;
	double l;
	cin >> r;
	l = r * 2 * 3.1415926535;
	cout << l << 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;
typedef long long int ll;

int main(){
	ll a;
	cin>>a;
	cout<< 2*3.1416*a<<endl;
		
}

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

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

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:
a.cc:4:19: error: 'acs' was not declared in this scope; did you mean 'acos'?
    4 | const double PI = acs(-1.0);
      |                   ^~~
      |                   acos
Language: C

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i,N) for (ll i=0;i<N;i++)
#define REP(i,N) for (ll i=1;i<=N;i++)
#define PI 3.14159265358979
ll N,M,A,B,C,ANS;
string S,T,U;
double n,m,a,b,c,ans;

int main() {
	cin>>a;
  cout<<2*a*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>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#ifdef ENABLE_DEBUG
#define dump(a) cerr<<#a<<"="<<a<<endl
#define dumparr(a,n) cerr<<#a<<"["<<n<<"]="<<a[n]<<endl
#else
#define dump(a) 
#define dumparr(a,n) 
#endif
#define FOR(i, a, b) for(ll i = (ll)a;i < (ll)b;i++)
#define For(i, a) FOR(i, 0, a)
#define REV(i, a, b) for(ll i = (ll)b-1LL;i >= (ll)a;i--)
#define Rev(i, a) REV(i, 0, a)
#define REP(a) For(i, a)
#define SIGN(a) (a==0?0:(a>0?1:-1))

typedef long long int ll;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef pair<ll, ll> pll;
typedef pair<ll,pll> ppll;
typedef vector<ll> vll;
typedef long double ld;
typedef pair<ld,ld> pdd;

const ll INF=(1LL<<50);
#if __cplusplus<201700L
ll gcd(ll a, ll b) {
  if(a < b) return gcd(b, a);
  ll r;
  while ((r=a%b)) {
    a = b;
    b = r;
  }
  return b;
}
#endif
template<class T>
bool chmax(T& a,const T& b){
  if(a<b){
    a=b;
    return true;
  }
  return false;
}
template<class T>
bool chmin(T& a,const T& b){
  if(a>b){
    a=b;
    return true;
  }
  return false;
}
template<class S,class T>
std::ostream& operator<<(std::ostream& os,pair<S,T> a){
  os << "(" << a.first << "," << a.second << ")";
  return os;
}
template<class T>
std::ostream& operator<<(std::ostream& os,vector<T> a){
  os << "[ ";
  REP(a.size()){
    os<< a[i] << " ";
  }
  os<< " ]";
  return os;
}

int main(){
  double R;
  cin>>R;
  cout<<setprecision(1000)<<4*R*M_PI_2f64<<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() {
	lond double x;
    cin >> x;
    cout << setprecision(10) << fixed << x * 3.14159265359 << 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

/**
 * Author RDP
 * 
**/
#include <iostream>
#include <sstream>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <cctype>
#include <string>
#include <vector>
#include <list>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <queue>
#include <stack>
#include <algorithm>
#include <functional>
#include <bitset>
#include <iomanip>
#define endl '\n'
#define bp(x) __builtin_popcount(x)
#define zf(x) __builtin_clz(x)
#define zl(x) __builtin_ctz(x)
#define par(x) __bultin_parity(x)
#define FAST_IO ios::sync_with_stdio(0); std::cin.tie(0);
typedef long long ll;
using namespace std;

void test_case()
{
    FAST_IO
    double r;
    cin >> r;
    cout <<6.28318530717958623200 * r <<endl;
    return ;
}
int main()
{
    FAST_IO
    test_case();
    return 0;
}

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

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define all(v) v.begin(), v.end()
typedef long long ll;
typedef pair<ll,ll> P;
typedef vector<ll> vec;
typedef vector<vec> mat;
int main(){
    double r,pi=3.14159265358979;
    cin>>r;
    cout<<setprecision(10)<<2*r*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 <bits/stdc++.h>
using namespace std;

const long double DPI = 6.28318530717958623200;
long double r;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> r;
	cout << PI * r << endl;
	return 0;
}


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

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

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

    cout << R * 2 * 3.14 << 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 "utils.cpp"

#include <bits/stdc++.h>


using namespace std;
using ll = int64_t;
#define int int64_t

 
/* ==== declarations ====== */
// functions
void solve();
void getInput();
 
// global variables
int W, H;
double pi = 3.1415926535;
/* ======================== */
void getInput() {
    
}
 
 
void solve() {
    int R;
    cin>>R;
    cout<<2*R*pi<<endl;
}
 
 
 
signed main(){
    getInput();
    solve();
    return 0;
}

Compiler output:
a.cc:1:10: fatal error: utils.cpp: No such file or directory
    1 | #include "utils.cpp"
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<vector>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);++i)
using ll = long long;
using P = pair<int, int>;
#include<algorithm>
#include<math.h>
#include<map>
#include<queue>
#include<string>
#include<iomanip>

int main() {
	double r;
	cin >> r;
	double M_PI = 3.141592653589793;
	double ans = 2 * r * M_PI;
	cout << fixed << setprecision(8) << ans;

	return 0;
}

Compiler output:
In file included from /usr/include/c++/14/cmath:47,
                 from /usr/include/c++/14/math.h:36,
                 from a.cc:8:
a.cc: In function 'int main()':
a.cc:17:16: error: expected unqualified-id before numeric constant
   17 |         double M_PI = 3.141592653589793;
      |                ^~~~
Language: C

#include<cstdio>
#include<math.h>
#include<algorithm>
#include<vector>
#include<queue>
#include<stack>
#include<string>
#include<set>
#include<cstring>
#include<map>
 
 
using namespace std;
#define int long long int
#define rep(i,n) for(int i=0;i<n;i++)
#define INF 1001001001
#define LLINF 1001001001001001001
#define mp make_pair
#define pb push_back
#define mod 1000000007

double R;
signed main(){
    scanf("%lf",&R);
    double ans=2.0*R*M_PI;
    printf("%lf\n",ans);
    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main()
{
  long long int r;
  cin>>r;
  double c=2*22*r/7;
  cout<<c<<"\n";
}

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 int ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef vector<string>vst;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<pii> vii;
typedef vector<pll> vll;

#define fastio ios_base::sync_with_stdio(false);cin.tie(0)
#define all(ct) ct.begin() , ct.end()
#define endl "\n"
#define fr(i,a) for(auto i:a)
#define f(i,a,b) for(int i=a;i<b;++i)
#define fd(i,a,b) for(int i=a;i>=b;--i)
#define pb push_back
#define in(d,v) d.find(v)!=d.end()
#define mp make_pair
#define size(a) int(a.size())

const int mod = 1e9 + 7;
const ll inf = ll(1e18);
const double PI = acos(-1);

ll modexp(ll x,ll n,int md){
    if(n==0)return 1;
    if(n%2==0)return modexp((x*x)%md,n/2,md);
    return (x*modexp((x*x)%md,n/2,md))%md;
}

int main(){
    fastio;
    //clock_t tm = clock();
    double r;
    cin>>r;
    double ans=2*PI*r;
    cout<<setprecision(8)<<ans<<endl;
    //cout<<((clock()-tm)*1.0)/CLOCKS_PER_SEC<<endl;
}

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

#include<iostream>
#include<math.h>
#include<algorithm>
#include<stdint.h>
#include<vector>
#include<deque>
#include<stack>
#include<string>
#include<cstring>
#include<time.h>
#include<iomanip>
#include<list>
#include<set>
#include<unordered_map>
#include<unordered_set>
#include<random>
#include<bitset>
#include <queue>
#include <map>


using namespace std;
using ll = long long;
using ull = unsigned long long;
using uint = unsigned int;
using ldouble = long double;

#define repi(i,a,b) for(ll i = (a); i < (b); i++)
#define rep(i, n) for(ll i = 0; i < (n); ++i)

int main() {
    double r;
    cin >> r;
    cout << r * 3.14159 << endl;
    return 0;
}



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

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int r;
    cin >> r;
    cout << setprecision(5) << 2 * acos(-1) * r << endl;
    return 0;
}



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

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

int main(){
    int R;
    cin >> R;
    cout << 3.141592*R*2 << 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;
//#include <boost/multiprecision/cpp_int.hpp>
//using namespace boost::multiprecision;

#define int long long int

signed main(){

ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int t=1;
//cin>>t;
while(t--){
int r;
cin>>r;

cout<<2*(3.141)*r<<endl;


}


}



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

#include <bits/stdc++>

using namespace std;
using ll = long long;

int main() {
    double r;
    cin>>r;
    cout<<2*r*3.141<<endl;
    return 0;
}


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

#include <bits/stdc++.h>

using namespace std;
using ll = long long;


int n;


void solve()
{
    ;
}

int main()
{
    cin >> n;
    
    solve();
    cout << (double)n * 3.1415926535897932 * 2.0 << endl;

    return EXIT_SUCCESS;
}

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;

// Type alias
using ll=long long;
using ld=double;

using pi=pair<int,int>;
using pll=pair<ll,ll>;
using pld=pair<ld,ld>;
using ti3=tuple<int, int, int>;

using vi=vector<int>;
using vll=vector<ll>;
using vld=vector<ld>;
using vpi=vector<pi>;
using vpll=vector<ll>;
using vpld=vector<ld>;
using vti3=vector<ti3>;

// Constants
const double EPS = 1e-9;
const int inf = numeric_limits<int>::max() / 2;
const ll mod = 1e9+7;

// Macro
#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 REP(i,a,b) for(int i=int(a);i<int(b);++i)
#define RREP(i,a,b) for(int i=int(b-1);i>=int(a);--i)
#define SHOW(a) cout << #a << " = " << a << endl
#define ARR(a,n) for(int i=0;i<int(n);++i) cout << #a << "[" << i << "]" << " = " << a[i] << endl

#define ALL(a) a.begin(),a.end()

// Funtcions
ll pow(ll base, ll i, ll mod){
  ll a = 1;
  while(i){
    if (i & 1) {
      a *= base;
      a %= mod;
    }
    base *= base;
    base %= mod;
    i >>= 1;
  }
  return a;
}
ll gcd(ll a, ll b){
  while(b){
    ll c = a % b;
    a = b;
    b = c;
  }
  return a;
}
ll lcm(ll a, ll b){
  return a / gcd(a, b) * b;
}
template<typename T> bool chmin(T& a, const T& b) {
  if (a > b) return a = b, true; else return false;
}

template<typename T> bool chmax(T& a, const T& b) {
  if (a < b) return a = b, true; else return false;
}


void solve(){
  
}

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

#include <iostream>
#include <stdio.h>
#include <stdint.h>
#include <vector>
#include <string>
#include <queue>
#include <map>
#include <set>
#include <utility>
#include <string>
#include <math.h>
#include <time.h>
#include <algorithm>
#include <deque>

using namespace::std;

int ri()
{
	int x;
	scanf("%d", &x);

	return x;
}

int64_t ri64()
{
	int64_t x;
	scanf("%lld", &x);

	return x;
}

void wi(int x)
{
	printf("%d\n", x);
}

void wvi(vector<int> &v)
{
	for (int i = 0; i < v.size(); i++)
		printf("%d ", v[i]);
	printf("\n");
}

void dbg(string &str, int x)
{
	cout << str << ": ";
	wi(x);
}

void dbg(string &str, vector<int> &x)
{
	cout << str << ": ";
	wvi(x);
}

int main()
{
        long double pi = 4.0 * atanl(1.0);
        
        long double R;
        cin >> R;

        long double ans = 2.0 * pi * R;
        printf("%.2f\n", (double) ans);

	return 0;
}


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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: 'pi' was not declared in this scope
    6 |   cout<<2*pi*r<<endl;
      |           ^~
Language: C

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

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

  cout << 2*R*3.14159265 << 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(int i = 0; i < n; i++)
#define REP1(i,n) for(int i = 1; i < n+1 ;i++)
#define REPR(i, n) for(int i = n; i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)
#define INF 2e9
#define ALL(v) v.begin(), v.end()
#define SZ(x) ((int)(x).size())
#define ARRAY_LENGTH(array) (sizeof(array) / sizeof(array[0]))
using namespace std;
typedef long long ll;
using p = pair<int, int>;
using P = pair<ll, ll>;
using V = vector<int>;
using VV = vector<vector<int>>;
using VVV = vector<vector<vector<int>>>;
using VL = vector<ll>;
using VVL = vector<vector<ll>>;
using VVVL = vector<vector<vector<ll>>>;
using Graph = VV;


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

#include <bits/stdc++.h>

using namespace std;

#define rep(i,n) for(int i=0;i<(n);i++)
#define repa(i,a,n) for(int i=(a);i<(n);i++)
#define rrep(i,n) for(int i=n;i>=0;i--)
#define rrepa(i,a,n) for(int i=n;i>=(a);i--)
#define all(a) (a).begin(),(a).end()
#define MOD 1000000007
#define cmax(a,b) a=max(a,b)
#define cmin(a,b) a=min(a,b)
#define vc vector

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef pair<int,int> pi;

int main(){

    double r;cin>>r;

    cout<<2*M_PI*r<<"\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>
#define pi acos(-1)
using namespace std;

const int N = 2e5 + 10, mod = 1e9 + 7;



int main() {
    // ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int tc = 1; 
    //scanf("%d", &tc);
    while(tc--) {
        int r; cin >> r;
        printf("%.20lf\n", 2 * pi * r);
    }    
    return 0;
}

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

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < n; ++i)
#define rep2(i, i0, n) for (int i = i0; i < n; ++i)

int main() {
  double r;
  cin >> r;
  cout << fixed << setprecision(15);
  cout << 2 * 3.14159265 * 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

r = int(input())
print(r*2*3.1415)

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

#include "bits/stdc++.h"

using namespace std;
using VI = vector<int>;
using VPI = vector<pair<int, int>>;
using LL = long long;

#define FOR(a,n) for(int i=a;i<n;i++)
#define rFOR(a,n) for(int i=n-1;i>=a;i--)
#define IN(n,a) for(int i=0;i<n;i++) cin>>a[i]
#define pIN(n,t) for(int i=0;i<n;i++){int a,b; cin>>a>>b; t.emplace_back(a,b);}
#define SORT(a) sort(a.begin(), a.end())
#define ALL(a) a.begin(), a.end()

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