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

///AJoy Sarker ,CSE JAHANGIRNAGAR UNIVERSITY 48 Batch
#include<bits/stdc++.h>
using namespace std;
#define SORT(c) sort((c).begin(),(c).end());
#define inf INT_MAX/3
#define pb push_back
#define MP make_pair
#define pii pair<int,int>
#define pcc pair<char,char>
#define pic pair<int,char>
#define pci pair<char,int>
#define VS vector<string>
#define VI vector<int>
#define MIN(a,b) (a>b?b:a)
#define MAX(a,b) (a>b?a:b)
#define pi 3.141592653589793
#define in scanf
#define out printf
#define ll long long
#define ull unsigned long long
#define w(x) int x;cin>>x;while(x--)
#define fast ios_base::sync_with_stdio(0)
#define FOR(i,a,b) for( int i=(a),_b=(b);i<=_b;i++)
#define DOW(i,b,a) for( int i=(b),_a=(a);i>=_a;i--)
#define sz size()
typedef unsigned long long UL;
template<typename T>inline T  S(T a)
{
    return a*a;
}
template<class T>inline string tostring(T a)
{
    ostringstream os("");
    os << a;
    return os.str();
}
template<typename T>inline ll tolong(T a)
{
    ll res;
    istringstream os(a);
    os>>res;
    return res;
}
template<typename T>inline T gcd(T a, T b)
{
    if (b == 0)return a;
    else return gcd(b, a % b);
}
template<typename T>inline T bigmod(T a, T b, T m)
{
    if (b == 0)return 1;
    else if (b % 2 == 0)return S(bigmod(a, b / 2, m)) % m;
    else return (a % m*bigmod(a, b - 1, m)) % m;
}
#define N 20000009
bool prime[N];
vector<ll> prm;
void seive ()
{

    memset(prime, true, sizeof(prime));

    for( ll i=2; i*i<=N; i++)
    {
        if (prime[i] == true)
        {
            prm.pb(i);
            for (ll j=i*i; j<=N; j += i)
                prime[j] = false;
        }
    }
}
void pr (int f)
{
    if(f==1)
        cout<<"YES\n";
    else
        cout<<"NO\n";
}
map<int,int>mp;
set<int> s;

int main()
{
    fast;
    double x;
    cin>>x;
    x=(x*pi*2.0);
    cout<<x<<endl;
}



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>
#include                        <ext/pb_ds/assoc_container.hpp>
#define lb                      lower_bound
#define ub                      upper_bound
#define fe(x)                   *(x.begin())
#define le(x)                   *(x.rbegin())
#define pb                      push_back
#define load(node,n)            bool operator < (const node &n) const
#define fbo(x)                  find_by_order(x)
#define ook(x)                  order_of_key(x)
#define all(x)                  (x).begin(),(x).end()
#define FOR(i,n)                for(int i = 1; i<=n; i++)
#define REP(i,n)                for(int i = 0; i<n;  i++)
#define TT                      int TC;  scanf("%d",&TC);  while(TC--)
#define read                    freopen("input.txt","r",stdin)
#define write                   freopen("output.txt","w",stdout)
#define dbg(...)                debug_out(vec_splitter(#__VA_ARGS__), 0, __LINE__, __VA_ARGS__)
#define set(x)                  tree<x,null_type,less<x>,rb_tree_tag,tree_order_statistics_node_update>
using                           namespace __gnu_pbds;
using                           namespace std;
typedef                         long long ll;
typedef                         pair<ll,ll> pll;
typedef                         pair<int,int> pii;

vector<string> vec_splitter(string s){
    s += ','; vector<string> res;
    while(!s.empty()) res.push_back(s.substr(0,s.find(','))), s = s.substr(s.find(',') + 1);
    return res;
}
void debug_out(
vector<string> __attribute__ ((unused)) args,
__attribute__ ((unused))int idx,
__attribute__ ((unused)) int LINE_NUM) { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(vector<string> args, int idx, int LINE_NUM, Head H, Tail... T){
    if(idx > 0) cerr << ", "; else cerr << "Line(" << LINE_NUM << ") "; stringstream ss; ss << H;
    cerr << args[idx] << " = " << ss.str(); debug_out(args, idx + 1, LINE_NUM, T...);
}






main(){
//read;

double a;
cin>>a;
double pi = acos(-1);
double ans = 2*pi*a;
printf("%.6f",ans);






return 0;
}


Compiler output:
main.c:1:33: fatal error: bits/stdc++.h: No such file or directory
    1 | #include                        <bits/stdc++.h>
      |                                 ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>
typedef long long int ll;
using namespace std;
long double pi =  3.141592653589793238;
int main(){
	ios_base::sync_with_stdio(false);  
	cin.tie(NULL);
	int r;cin>>r;
	double ans = double(2*pi*r);
	cout<<setprecision(10)<<ans<<endl;
}


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

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

#define ll long long int
#define FIO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define loop(i,x,n) for(int i=x;i<n;i++)
#define arr 1000005
#define F first
#define S second
#define pii pair<int,int>

const int modu=1e9+7;
ll mod(ll n){
    return (n%modu);
}

bool cmp(ll a,ll b){
    return a>b;
}

int main() {
    FIO
    ll r;
    cin>>r;
    float x=2*r;
    x=x*3.14;
    cout<<x;
	return 0;
}


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

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int R;
  cin >> R;
  cout << 2 * R * 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 <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <map>
#include <queue>
#include <iomanip>
#include <set>
#include <tuple>
#define mkp make_pair
#define mkt make_tuple
#define rep(i,n) for(int i = 0; i < (n); ++i)
using namespace std;
typedef long long ll;
const ll MOD=1e9+7;
template<class T> void chmin(T &a,const T &b){if(a>b) a=b;}
template<class T> void chmax(T &a,const T &b){if(a<b) a=b;}

const long double PI=acos(-1.0l);

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

  long double D;
  cin>>D;
  cout<<fixed<<setprecision(10)<<2*D*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

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


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

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

int main()
{
	int n;
	cin>>n;
	double sum=1.0000000;
	sum=1.0*(double)2*n*3.14159265358979323846;
	printf("%.20f",sum);

	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 ll long long
#define pb push_back
using namespace std;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    double r;
    cin>>r;
    double pi=3.1415926;
    pi=2*pi*r;
    cout<<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

#include <iostream>
#include<bits/stdc++.h>
using namespace std;
typedef long double ld;
ld n;
int main(void){
    cin>>n;
    cout<<setprecision(15)<<2*n*M_PI<<endl;
}


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

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

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

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

int main()
{
	double a;
	cin >> a;
	cout << acos(a);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'acos' was not declared in this scope
    9 |         cout << acos(a);
      |                 ^~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
void solve()
{
	
}
int main()
{
	double r;
	cin>>r;
	double pi = 3.1415926535;
	cout<<setprecision(6)<<fixed<<2*pi*r<<'\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;

int main(){
    int R;
    cin >> R;
    long double circumference = 2.0 * 3.14159265358979323846 * R;
    cout << circumference << endl;

    return 0;

}

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

#include <algorithm>
#include <bitset>
#include <climits>
#include <cmath>
#include <cstdio>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <vector>

#define MOD 1000000007
#define MOD2 998244353
#define int long long
#define double long double
#define EPS 1e-9
//#define PI 3.14159265358979

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

using namespace std;

template < typename T >
ostream &operator<<(ostream &os, const vector< T > &A) {
	for (int i = 0; i < A.size(); i++)
		os << A[i] << " ";
	os << endl;
	return os;
}
template <>
ostream &operator<<(ostream &os, const vector< vector< int > > &A) {
	int N = A.size();
	int M;
	if (N > 0)
		M = A[0].size();
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < M; j++)
			os << A[i][j] << " ";
		os << endl;
	}
	return os;
}

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

struct edge {
	int from, to, d, c;
	edge(int _from = 0, int _to = 0, int _d = 0, int _c = 0) {
		from = _from;
		to = _to;
		d = _d;
		c = _c;
	}
	bool operator<(const edge &rhs) const {
		return (d == rhs.d) ? (c < rhs.c) : (d < rhs.d);
	}
};
struct aabb {
	int x1, y1, x2, y2;
	aabb(int x1, int y1, int x2, int y2) : x1(x1), y1(y1), x2(x2), y2(y2) {}
};

typedef vector< edge > edges;
typedef vector< edges > graph;
struct flow {
	int to, cap, rev, cost;
	flow(int to = 0, int cap = 0, int rev = 0, int cost = 0) : to(to), cap(cap), rev(rev), cost(cost) {}
};
typedef vector< vector< flow > > flows;

const int di[4] = {0, -1, 0, 1};
const int dj[4] = {-1, 0, 1, 0};
const int ci[5] = {0, 0, -1, 0, 1};
const int cj[5] = {0, -1, 0, 1, 0};
const ll LINF = LLONG_MAX / 2;
const int INF = INT_MAX / 2;
const double PI = acos(-1);

int pow2(int n) { return 1LL << n; }
template < typename T, typename U >
bool chmin(T &x, const U &y) {
	if (x > y) {
		x = y;
		return true;
	}
	return false;
}
template < typename T, typename U >
bool chmax(T &x, const U &y) {
	if (x < y) {
		x = y;
		return true;
	}
	return false;
}

struct initializer {
	initializer() {
		cout << fixed << setprecision(20);
	}
};
initializer _____;

int N, M, K, T, Q, H, W;
signed main() {
	cin >> N;
	cout << N * 2 * PI << endl;
	return 0;
}

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

#include<bits/stdc++.h>
#define forr(i, a, b) for(int i = (a); i < (b); i++)
#define rep(i,n) for(int i = 0; i < (n); i++)
#define rrep(i,n) for(int i = 1; i <= (n); i++)
#define ALL(a) (a.begin()),(a.end())
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<ll, ll> LP;
const ll LINF = 1LL<<60;
const int INF = 1001001001;
const int MOD = 1000000007;

/* --------------------------------------------------- */


int main() {
    int r;
    cin >> r;
    cout << 2 * 3.141592 * r << endl;
    
    return 0;
}

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

#include<iostream>
using namespace std;
int main()
{
    // 整数の入力
    int a;
    cin >> a;
    // スペース区切りの整数の入力
    
    
    cout << (2*3.1415*a) 
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:25: error: expected ';' before '}' token
   11 |     cout << (2*3.1415*a)
      |                         ^
      |                         ;
   12 | 
   13 | }
      | ~
Language: C

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

ll R;

int main(){
    cin >> R;
    cout << fixed << setprecision(15) << 2 * M_PI * R << endl;
    return 0;
}

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

#include <bits/stdc++.h>
#define repr(i,from,to) for(int (i)=(from);(i)<(to);(i)++)
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
// const bool debug=true;
const bool debug=false;
#define DEBUG if(debug==true)
#define all(x) begin((x)), end((x))
#define vprint(x) for(auto a:(x)) cout << x << endl;
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
const ll MOD = 1000000007;
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) { a = b; return true;}
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) { a = b; return true;}
    return false;
}


int main(void) {
    cin.tie(0);
    ios::sync_with_stdio(false);
    long double d;
    cin>>d;
    cout << d * M_PI << endl;
    return 0;
}


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

N=int(input()) 
  print(N*3.1415)

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | N=int(input())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'N' [-Wimplicit-int]
main.c:1:3: error: expected expression before 'int'
    1 | N=int(input())
      |   ^~~
Language: C

#include<map>
#include<set>
#include<cmath>
#include<stack>
#include<queue>
#include<deque>
#include<ctime>
#include<vector>
#include<bitset>
#include<string>
#include<cstdio>
#include<numeric>
#include<utility>
#include<sstream>
#include<cstdlib>
#include<iomanip>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<functional>
#include<unordered_map>
#define _USE_MATH_DEFINES
#define inf 999999999999999999
#define rep(i,n,m) for(lli i=(lli)(n);i<(lli)(m);++i)
#define reep(i,n,m) for(int i=(int)(n);i<=(int)(m);++i)
#define per(i,m,n) for(lli i=(int)(m)-1;i>=(int)(n);--i)
#define st(n) sort(n.begin(), n.end())
#define rev(n) reverse(n.begin(),n.end())
#define ou(S) cout << S << endl
#define pb(n) push_back(n)
#define ue(N) N.erase(unique(N.begin(),N.end()),N.end());
#define nou(S) cout << S
#define hou(S) cout << setprecision(30) << S << endl
#define vec(K,L,N,S) vector<L> K(N,S)
#define dv(K,L,N,M,S) vector<vector<L>> K(N,vector<L>(M,S))
#define tv(K,L,N,M,R,S) vector<vector<vector<L>>> K(N,vector<vector<L>>(M,vector<L>(R,S)))
#define pint pair<lli,lli>
#define paf(L,R) pair<L,R>
#define maxx 5100000
#define chmax(a, b) a = (((a)<(b)) ? (b) : (a))
#define chmin(a, b) a = (((a)>(b)) ? (b) : (a))
#define endl "\n"
typedef long long int lli;
typedef unsigned long long int uli;
const uli mod = 1e9 + 7;
using namespace std;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    double r;
    cin >> r;
    cout << fixed << setprecision(15) << r * 2 * 3.14159265358979 << endl;
}

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

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			int r = scanner.nextInt();
			System.out.println(2 * r * Math.PI);
		}
	}
}


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

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int main() {
    double r;
    cin >> r;
    cout << 2.0 * r * 3.141592;
    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 r;
	cin >> r;
	cout << r * 2 * 3.1415 << endl;
}

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

#include "bits/stdc++.h"
#include <set>
using namespace std;
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define RFOR(i, a, b) for (int i = (b)-1; i >= (a); i--)
#define rep(i, n) for (int i = 0; i < (n); i++)
#define rep1(i, n) for (int i = 1; i < (n); i++)
#define rrep(i, n) for (int i = (n)-1; i >= 0; i--)
#define all(i) (i).begin(), (i).end()
#define rall(i) (i).begin(), (i).end(), greater<int>()
#define int long long
#define elif else if
#define eb emplace_back
#define pb push_back
#define mp make_pair
#define fst first
#define sec second
#define mod 1000000007
#define INF 10e10
template <typename T>

void print(T x)
{
	std::cout << x << " ";
}
template <typename T>

void println(T x)
{
	std::cout << x << "\n";
}

int dp[101][101][101];

signed main(void) {
	int R;
	cin >> R;
	std::cout << std::fixed;
	std::cout << std::setprecision(5) << R * 2 * 3.14159265359; 
}


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

from collections import defaultdict, deque, Counter
from heapq import heappush, heappop, heapify
import math
import bisect
import random
from itertools import permutations, accumulate, combinations, product
import sys
from pprint import pprint
from copy import deepcopy
import string
from bisect import bisect_left, bisect_right
from math import factorial, ceil, floor
from operator import mul
from functools import reduce
from pprint import pprint


sys.setrecursionlimit(2147483647)
INF = 10 ** 15
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def I(): return int(sys.stdin.buffer.readline())
def LS(): return sys.stdin.buffer.readline().rstrip().decode('utf-8').split()
def S(): return sys.stdin.buffer.readline().rstrip().decode('utf-8')
def IR(n): return [I() for i in range(n)]
def LIR(n): return [LI() for i in range(n)]
def SR(n): return [S() for i in range(n)]
def LSR(n): return [LS() for i in range(n)]
def SRL(n): return [list(S()) for i in range(n)]
def MSRL(n): return [[int(j) for j in list(S())] for i in range(n)]
mod = 1000000007

print(3.14 * I() * 2)

Compiler output:
main.c:1:1: error: unknown type name 'from'
    1 | from collections import defaultdict, deque, Counter
      | ^~~~
main.c:1:18: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'import'
    1 | from collections import defaultdict, deque, Counter
      |                  ^~~~~~
main.c:1:18: error: unknown type name 'import'
main.c:22:62: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
   22 | def LS(): return sys.stdin.buffer.readline().rstrip().decode('utf-8').split()
      |                                                              ^~~~~~~
main.c:23:61: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
   23 | def S(): return sys.stdin.buffer.readline().rstrip().decode('utf-8')
      |                                                             ^~~~~~~
Language: C

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;
const int INF = 1000000000;
const int MOD = 1000000007;

ll gcd(ll a, ll b) { return b?gcd(b,a%b):a;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}

int main() {
  long double r;
  cin >> r;
  long double ans = 2 * r * M_PI;
  cout << fixed << setprecision(10) << 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>

#define rep(i, n) for(int i=0; i < n; i++)
#define REP(i, n, m) for(int i=n; i < m; i++)
#define reps(i, n) for(int i=1; i <= n; i++)
#define ALL(v) v.begin(), v.end()
#define rALL(v) v.rbegin(), v.rend()
#define pb(x) push_back(x)
#define mp(x,y) make_pair(x,y)

using namespace std;
using ll=long long;

ll mod=1000000007;

const ll INF = 1LL << 60;

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

int main(){
  double r;cin>>r;
  cout <<setprecision(10)<< 2*r*3.14159266<<endl;
}


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

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

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

#include <bits/stdc++.h>
#define MOD (long long)(1E9+7)
#define rep(i, n) for(int i = 0; i < n; i++)

using namespace std;


long long extgcd(long long a)
{
	long long b = MOD;
	long long u = 1, v = 0, q; 
	while ( b > 0 ) {
		q = a / b; 
		a -= q * b; swap(a,b);
		u -= q * v; swap(u,v);
	}
	u %= MOD;
	while (u<0)
		u+=MOD;
	return u;
}
long long comb(long long n,long long k)
{
	long long t = 1;
	long long j = k;
	for(long long i = n; i  >= n-k+1; i--) {
		t *= i;
		t %= MOD;
		t *= extgcd(j);
		t %= MOD;
		j--;
	}  
  	while (t<0)
		t += MOD;
	return t;
}

int main(){
	int n;
	cin >>n;
	prinft("%8.8lf\n", 3.14159*(long long)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

import numpy as np
R=int(input())
print(np.pi*R*2.0)

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import numpy as np
      | ^~~~~~
main.c:1:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'as'
    1 | import numpy as np
      |              ^~
main.c:1:14: error: unknown type name 'as'
Language: C++

#include <bits/stdc++.h>
#define exrep(i, a, b) for(long long i = a; i <= b; i++)
#define rep(i,n)for(long long i=0;i<(long long)(n);i++)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef vector<ll> vl;
typedef vector<vector<ll>> vvl;
typedef pair<ll, ll> P;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
 
const ll MOD=1e9+7;
const ll INF=1e18;
const int MAX=110000;
const double pi=acos(-1);
int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};

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


Compiler output:
a.cc: In function 'int main()':
a.cc:29:53: error: expected ';' before 'return'
   29 |   cout << fixed << setprecision(10) <<2*pi*r << endl
      |                                                     ^
      |                                                     ;
   30 |   return 0;
      |   ~~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
#define MOD (long long)(1e9+7)
typedef long long int ll;
typedef unsigned long long int ull;

ll modularExponentiation(ll x, ll y, ll  p){
  ll res = 1;
  x = x % p;
  while (y > 0){
      if (y & 1) res = (res*x) % p;
      y = y>>1;
      x = (x*x) % p;
  }
  return res;
}

bool isPrime(ll n){
    if (n <= 1)  return false;
    if (n <= 3)  return true;
    if (n%2 == 0 || n%3 == 0) return false;
    for (int i=5; i*i<=n; i=i+6)
        if (n%i == 0 || n%(i+2) == 0)
           return false;
    return true;
}

int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  ll T=1;
  // cin>>T;
  for(int _case=0;_case<T;_case++){
    double n;
    cin>>n;
    cout<<2*double(104348/33215.)*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>
#include <chrono>
#include <cmath>
#include <string.h>
#include <iomanip>
#include <algorithm>
#include <unordered_set>
#include <vector>
#include <queue>
#include <cmath>
#include <unordered_map>
#include <fstream>
#include <functional>

#define MAX(a, b) (a > b ? a : b)
#define MIN(a, b) (a < b ? a : b)

constexpr auto NMAX = (int)2e5 + 20;
constexpr auto INF = 2000000000;
using namespace std;

typedef unsigned long long ull;

int r;
double const pi = 3.14159;

int main()
{
	cin >> r;
	cout << 2 * pi * r << '\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>
#define rep(i, n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int, int>;

int main()
{
  double N;
  cin >> N;
  const double PI = acos(-1);
  cout << 2 * PI * N << endl;
}

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

public class Main {
    public static void main(String[] args){
        double PI = 3.1415;
        Scanner scan = new Scanner(System.in);
        String str = scan.nextLine();
        int input = Integer.parseInt(str);
        System.out.println(Math.PI*input*2);
    }
}

Compiler output:
Main.java:4: error: cannot find symbol
        Scanner scan = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
        Scanner scan = new Scanner(System.in);
                           ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int r;
    const double pi = 3.14159265359;

    cin >> r;

    cout << fixed << setprecision(9) << 2 * 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 _GLIBCXX_DEBUG
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rrep(i, n) for (int i = 1; i < (n + 1); ++i)
using namespace std;
using ll = long long;
const int INF = +100100100;
// typedef pair<int,int> P;
const int MAX = 1000000;

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

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

#include<bits/stdc++.h>
using namespace std;
int main() {
    int R;
    cin >> R;
    cout << fixed << setprecision(10) << R * 2 * acos(-1) << 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;
using Int = long long;
int PREP = (cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(9), 0);
//int SEGV = getenv("D") || (exit(system("D= SEGFAULT_SIGNALS=all catchsegv ./prog.exe") >> 8), 0);
int main() {
    double R; cin >> R;
    cout << 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;
using ll = long long;
using P = pair<int, int>;

int main() {
    int r;
    cin >> r;
    double ans = 2 * r * M_PI;
    cout << fixed << setprecision(15) << 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<iostream>
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<set>
#include<string>
#include<map>
#include<string.h>
#include<complex>
#include<math.h>
#include<queue>
#include <functional>
#include<time.h>
#include <stack>
#include<iomanip>
using namespace std;
#define rep(i,a,n) for(int i=(a);i<(n);i++)
#define ll long long
#define llint long long int
#define reverse(v)  reverse(v.begin(), v.end());
#define Yes(ans) if(ans)cout<<"Yes"<<endl; else cout<<"No"<<endl;
#define YES(ans) if(ans)cout<<"YES"<<endl; else cout<<"NO"<<endl;
#define hei(a) vector<a>
#define whei(a) vector<vector<a>>
#define UF  UnionFind
#define rt (a); return (a); 
#define Pint pair<int,int>
#define keta(a)  fixed << setprecision(a)
constexpr auto INF = 1000000000;
constexpr auto mod = 1000000007;
//辞書順はnext_permutation( begin( v ), end( v ) );やで！
llint gcd(llint a, llint b) {
	if (b > a)swap(a, b);
	if (a % b == 0)return b;
	return gcd(b, a % b);
}
llint Tow(int n) {//2のn乗
	if (n == 0)return 1;
	llint x = Tow(n / 2);
	x %= mod;
	x *= x;
	x %= mod;
	if (n % 2 == 1)x *= 2;
	x %= mod;
	return x;
}
int dx[4] = { 1,0,-1,0 };
int dy[4] = { 0,1,0,-1 };
char a[501][501];
bool seen[1000][1000] = { false };
void dfs(int x,int y,int h,int w) {
	seen[x][y] = true;
	for (int i = 0; i < 4; i++) {
		int Nx = x + dx[i];
		int Ny = y + dy[i];
		if (Nx >= h || Ny >= w || seen[Nx][Ny] || a[Nx][Ny] == '#' || Nx < 0 || Ny < 0)continue;
		dfs(Nx, Ny,h,w);
	}
}
int main() {
	double a;
	cin >> a;
	double ans = 3.14159265 * a * 2;
	cout << keta(15) << ans << endl;
	return 0;
}

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

///بِسْمِ الّٰلهِ الرَّحْمٰنِ الرَحِيْمِ
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pi acos(-1.0)
int main()
{
     ios_base::sync_with_stdio(false);cin.tie(NULL);
     ll int i,n,t,p=INT_MAX,j=0,x,a=0,b,l=0,r=0,y,k,c,sum=0,m,d;
     cin>>r;
     double sd=2*pi*r;
     printf("%.5f",sd);
     return EXIT_SUCCESS;
}



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

//int a = stoi(c); 文字列をintへ
//小文字から大文字
//transform(a.begin(), a.end(), a.begin(), ::toupper);
//途中の出力をそのまま残さない
//数値計算 個数以外はdouble
//map<キー,値> p は辞書。p[キー] = 値
//map 全探索
//auto begin = p.begin(), end = p.end();
//for (auto it = begin; it != end; it++) {}
//mapのキー：it->first mapのバリュー：it->second
//絶対値 abs()
//入力は空白で切れる
//大文字判定 isupper(文字) 小文字判定 islower(文字)
//do{}while(next_permutation(ALL(配列)))
//while(N)で回すとき、Nはコピーを作っておく
//小文字に対応する文字コード：S[i] - 'a'
//文字コード→小文字：(char)(数字+'a')
//グラフの距離:隣接行列で扱う
//等価なものに変換する思考
//bool型　初期値はTrue
//島渡りの問題：中間ノードに着目
//配列はvector<>を使う：意味わからないエラーがなくなる。
//背反な事象にちゃんとわける
//チェックリストはマップを使う
//数が大きい時の比較はstring型で行う
//全て0になったか調べたい->0になるたびにcntする
//またはかかつか
//例外処理は最初にする
//x = p^m + q^n...の約数の個数:(n+1)*(m+1)....
//N!のどの素因数で何回割れるか
//⇔1~Nまでの数がそれぞれどの素因数で何回割り切れるかの和
//パズルの問題->一般化して全探索
//数が大きい時のせぐふぉはコードテストで試してみる
//スペルミスに注意
//stack<ll> s;
//s.push(要素);s.top();s.pop();
//queue<ll> q;
//q.push(要素);q.front();q.pop();
#include <bits/stdc++.h>
#define rep(i,N) for(int i = 0; i < N;i++)
#define ALL(a) (a).begin(),(a).end()
#define ll long long int
	using namespace std;

//円周率
const double PI = 3.14159265358979323846;
//割るやつ
const ll M = (pow(10, 9) + 7);

// K進数でのNの桁数
ll dig(ll N, ll K) {
	ll dig = 0;
	while (N) {
		dig++;
		N /= K;
	}
	return dig;
}
// a,bの最大公約数
ll gcd(ll a, ll b) {
	if (b == 0) return a;
	return gcd(b, a%b);
}

ll lcm(ll a, ll b) {
	ll g = gcd(a, b);
	return a / g * b;
}

//nC2の計算
ll C(ll N) {
	return N * (N - 1) / 2;
}

//階乗計算
ll f(ll n) {
	if (n == 0 || n == 1) return 1;
	else return (n * f(n - 1)) % M;
}

//Nをdで何回割れるか
ll divcnt(ll N, ll d) {
	ll ans = 0;
	while (1) {
		if (N%d == 0) {
			ans++;
			N /= d;
		}
		else break;
	}

	return ans;
}

//素数判定
bool prime(ll num) {
	if (num < 2) return false;
	else if (num == 2) return true;
	else if (num % 2 == 0) return false;
	double sqrtNum = sqrt(num);
	for (int i = 3; i <= sqrtNum; i += 2) {
		if (num % i == 0) return false;
	}
	return true;
}

//フィボナッチ数列
vector<ll> memo(pow(10, 6) + 1);
ll fibo(ll n) {
	if (n == 1) return 1;
	else if (n == 2) return 1;
	else if (memo[n] != 0) return memo[n];
	else return memo[n] = fibo(n - 1) + f(n - 2);
}

int main() {
	double R; cin >> R;
	cout << setprecision(20) << 2 * PI * R << endl;
}

Compiler output:
main.c:39:10: fatal error: bits/stdc++.h: No such file or directory
   39 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>

using namespace std;

#define REP1(i,n) for(int i=1, i##_len=(n); i<i##_len; ++i)
#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define pow(x) x*x
#define ll long long
static const ll MAX = 1000000;
static const ll INFTY = 1e12;
static const ll MOD = 1000000007;

template < typename T > inline string toString( const T &a ) { ostringstream oss; oss << a; return oss.str(); };

struct edge {
    ll to, cost;
};

using Graph = vector<vector<int>>;
using _Graph = vector<vector<edge>>;


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

// 深さ優先探索
vector<bool> seen;
vector<int> colors;

int H, W, N;
int sx, sy, gx, gy; 
vector<vector<char>> field;
vector<vector<int>> dist;
//vector<pair<int, int>> gx, gy;
deque<pair<int, int>> que;

typedef vector<vector<int> > Matrix;

const int INF = 100000000;


int main() {

    int R;
    cin >> R;

    double ans = 2 * 3.141592 * R;

    cout << ans << endl;
    

}
/*
                   _ooOoo_
                  o8888888o
                  88" . "88
                  (| -_- |)
                  O\  =  /O
               ____/`---'\____
             .'  \\|     |//  `.
            /  \\|||  :  |||//  \
           /  _||||| -:- |||||-  \
           |   | \\\  -  /// |   |
           | \_|  ''\---/''  |   |
           \  .-\__  `-`  ___/-. /
         ___`. .'  /--.--\  `. . __
      ."" '<  `.___\_<|>_/___.'  >'"".
     | | :  `- \`.;`\ _ /`;.`/ - ` : | |
     \  \ `-.   \_ __\ /__ _/   .-` /  /
======`-.____`-.___\_____/___.-`____.-'======
                   `=---='
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         pass System Test!
*/


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

#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>

using namespace std;

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

int main() {
  int N; cin >> N;
  double pi = 3.141;

  cout << N*2*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

package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
)

func out(x ...interface{}) {
	fmt.Println(x...)
}

var sc = bufio.NewScanner(os.Stdin)

func getInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func getString() string {
	sc.Scan()
	return sc.Text()
}

// min, max, asub, absなど基本関数
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func asub(a, b int) int {
	if a > b {
		return a - b
	}
	return b - a
}

func abs(a int) int {
	if a >= 0 {
		return a
	}
	return -a
}

func main() {
	sc.Split(bufio.ScanWords)

	R := float64(getInt())
	fmt.Printf("%12.12f\n", R*math.Pi*2)
}


Compiler output:
main.c:1:1: error: unknown type name 'package'
    1 | package main
      | ^~~~~~~
main.c:3:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'import'
    3 | import (
      | ^~~~~~
main.c:11:26: error: expected identifier or '(' before ')' token
   11 | func out(x ...interface{}) {
      |                          ^
main.c:15:1: error: unknown type name 'var'
   15 | var sc = bufio.NewScanner(os.Stdin)
      | ^~~
main.c:15:10: error: 'bufio' undeclared here (not in a function)
   15 | var sc = bufio.NewScanner(os.Stdin)
      |          ^~~~~
main.c:15:27: error: 'os' undeclared here (not in a function)
   15 | var sc = bufio.NewScanner(os.Stdin)
      |                           ^~
main.c:17:1: error: expected ',' or ';' before 'func'
   17 | func getInt() int {
      | ^~~~
main.c:26:1: error: unknown type name 'func'
   26 | func getString() string {
      | ^~~~
main.c: In function 'getString':
main.c:26:18: error: expected declaration specifiers before 'string'
   26 | func getString() string {
      |                  ^~~~~~
main.c:32:1: error: unknown type name 'func'
   32 | func max(a, b int) int {
      | ^~~~
main.c:32:14: error: expected ')' before 'int'
   32 | func max(a, b int) int {
      |              ^~~~
      |              )
main.c:39:1: error: unknown type name 'func'
   39 | func min(a, b int) int {
      | ^~~~
main.c:39:14: error: expected ')' before 'int'
   39 | func min(a, b int) int {
      |              ^~~~
      |              )
main.c:46:1: error: unknown type name 'func'
   46 | func asub(a, b int) int {
      | ^~~~
main.c:46:15: error: expected ')' before 'int'
   46 | func asub(a, b int) int {
      |               ^~~~
      |               )
main.c:53:1: error: unknown type name 'func'
   53 | func abs(a int) int {
      | ^~~~
main.c:53:10: error: unknown type name 'a'
   53 | func abs(a int) int {
      |          ^
main.c:60:1: error: unknown type name 'func'
   60 | func main() {
      | ^~~~
main.c:60:13: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
   60 | func main() {
      |             ^
main.c:66: error: expected '{' at end of input
Language: C

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

int main (){
  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;
using ll=long long;
using ld=long double;
using vi=vector<int>;
using vvi=vector<vi>;
using vl=vector<ll>;
using vvl=vector<vl>;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
const ll LINF=0x1fffffffffffffff;
const int INF=0x3fffffff;
const int MOD=1000000007;
#define VAR(type,...) type __VA_ARGS__;in(__VA_ARGS__)
#define VEC(type,name,size) vector<type> name(size);each(i, name)in(i)
#define rep(i,a,b) for(int i=(a);i<(b);++i)
#define rrep(i,a,b) for(int i=(a-1);i>=(b);--i)
#define each(i,v) for(auto &i:(v))
#define all(v) (v).begin(),(v).end()
#define print(...) out(__VA_ARGS__);cout<<endl
void in(){} template<class T,class... U> void in(T &t,U &...u){cin>>t;in(u...);}
void out(){} template<class T,class... U> void out(T t,U ...u){cout<<t<<" ";out(u...);}
void solve();
int main(){cin.tie(0);ios::sync_with_stdio(0);solve();}

void solve() {
  VAR(int, R);
  printf("%.10lf", (double)R * 2 * 3.14159265359);
}


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

#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define set_bits(a) __builtin_popcount(a)
#define pb push_back
#define pf push_front
#define mod 1000000007
#define M 998244353
#define fi first
#define se second
#define endl '\n'
#define INF 1e18
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
# define    PI                  3.14159265358979323846

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

    double ans = 2*PI*r;
    cout<<fixed<<setprecision(20)<<ans<<endl;
}


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

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

const double PI = acos(0.0)*2;

int main(){
    double r;
    cin >> r;
    cout << fixed << setprecision(12) << r*2*PI << endl;
    return 0;
}

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

 #include <bits/stdc++.h>
#define SpeeD ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define ll long long
#define endl '\n'
//pair<int, int> *p=new pair<int, int>[n];
//std::vector<pair<int,int>> vp;
//v.push_back(make_pair(x,y))
//pair<int, int> p[1000001];
//string *s=new string [n];
//int freq[e];
//freq[a[i]-'a']++; freq[a[i]]++;
 using namespace std;
ll n,t,m,c1,c2,c,x,y,sum,mn=999999999,avg,pos,dif,j,dis,mx,xi,yi,q;
vector<ll>v;
set<int>s;
map<ll , ll >mp;
bool PE(int x)
{
for (int i=2;i*i<=x;i++)
if (x%i==0)
return false;
return true;
}
bool PR(string s)
{
int n=s.length();
for(int i=0;i<n/2;i++)
if(s[i]!=s[n-i-1])
return false;
return true;
}

int main(void) 
{ SpeeD;
long double p =6.28318530717958623200/2.0;
cin>>n;
cout<<2*p*n;
}

Compiler output:
main.c:1:11: fatal error: bits/stdc++.h: No such file or directory
    1 |  #include <bits/stdc++.h>
      |           ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <iostream>
#include <string>
#include <map>
#include <vector>
#include <algorithm>
#include <set>
#include <stdio.h>
#include <cmath>
#include <queue>
#include <cmath>
#include <math.h>

typedef long long ll;
using namespace std;

int main(void){
    int R;
    cin >> R;
    printf("%.13f\n",2*M_PI*R);
}



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

#include<stdio.h>
int main(void)
{
    double r;
    scanf("%f",&r);
    printf("%f\n",2*r*3.141592);
    retrun 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:5: error: 'retrun' undeclared (first use in this function)
    7 |     retrun 0;
      |     ^~~~~~
main.c:7:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:7:11: error: expected ';' before numeric constant
    7 |     retrun 0;
      |           ^~
      |           ;
Language: C

#include <iostream>
#include <string>
#include <cmath>
#include<algorithm>
#include<stack>
#include<queue>
#include<map>
#include<set>
#include<iomanip>
#define _USE_MATH_DEFINES
#include <math.h>
#include <functional>
#include<complex>
using namespace std;

#define rep(i,x) for(ll i=0;i<x;i++)
#define repn(i,x) for(ll i=1;i<=x;i++)

typedef long long ll;
const ll INF = 1e17;
const ll MOD = 998244353;
const ll MAX = 4000001;
const double eps = 1E-18;

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

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

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

ll lcm(ll a, ll b) {
	return a / gcd(a, b) * b;
}

struct edge {
	ll ind;
	ll fr;
	ll to;
	ll d;
};

class mint {
	long long x;
public:
	mint(long long x = 0) : x((x% MOD + MOD) % MOD) {}
	mint operator-() const {
		return mint(-x);
	}
	mint& operator+=(const mint& a) {
		if ((x += a.x) >= MOD) x -= MOD;
		return *this;
	}
	mint& operator-=(const mint& a) {
		if ((x += MOD - a.x) >= MOD) x -= MOD;
		return *this;
	}
	mint& operator*=(const  mint& a) {
		(x *= a.x) %= MOD;
		return *this;
	}
	mint operator+(const mint& a) const {
		mint res(*this);
		return res += a;
	}
	mint operator-(const mint& a) const {
		mint res(*this);
		return res -= a;
	}
	mint operator*(const mint& a) const {
		mint res(*this);
		return res *= a;
	}

	mint operator^(const ll& t)const {
		if (!t) return 1;
		mint a = pow(t >> 1);
		a *= a;
		if (t & 1) a *= *this;
		return a;
	}

	mint pow(ll t) const {
		if (!t) return 1;
		mint a = pow(t >> 1);
		a *= a;
		if (t & 1) a *= *this;
		return a;
	}
	// for prime MOD
	mint inv() const {
		return pow(MOD - 2);
	}
	mint& operator/=(const mint& a) {
		return (*this) *= a.inv();
	}
	mint operator/(const mint& a) const {
		mint res(*this);
		return res /= a;
	}

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

///////////////////////////


int main(){

	double R;
	cin >> R;

	cout << fixed << setprecision(10);

	double ans = R * 2.0*acos(-1);

	cout << ans;


	system("PAUSE");
}


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

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


int main(){
 double r;
 cin>>r;
 cout<<r*2*3.141592;
 return 0;
}


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

#incluse<stdio.h>
int main()
{
  double a;
  scanf("%f",&a);
  a=a*3.141;
  printf("%f",a);
  return 0;
}

Compiler output:
main.c:1:2: error: invalid preprocessing directive #incluse; did you mean #include?
    1 | #incluse<stdio.h>
      |  ^~~~~~~
      |  include
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf("%f",&a);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #incluse<stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf("%f",&a);
      |   ^~~~~
main.c:5:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:7:3: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    7 |   printf("%f",a);
      |   ^~~~~~
main.c:7:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:7:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

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

#define fr(i,n) _back
#define pb	push_back
#define eb	emplace_back
#define mk	make_pair
#define fi	first
#define se	second
#define endl	'\n'

typedef long long ll;
typedef pair<int,int> ii;
typedef vector<ii> vii;
const int INF = 0x3f3f3f3f;
const double PI = acos(-1.0);

int main() {
    ios_base::sync_with_stdio(false);
    int r; cin >> r;
    cout << fixed << setprecision(2) << (double)r*2*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.