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

int Question163A(void) {
	float input = 0;
	float output = 0;
	scanf("%f", &input);
	output = 2 * input*M_PI;
	printf("%.2f\n", output);
	return 0;
}

Compiler output:
main.c: In function 'Question163A':
main.c:4:9: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    4 |         scanf("%f", &input);
      |         ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int Question163A(void) {
main.c:4:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    4 |         scanf("%f", &input);
      |         ^~~~~
main.c:4:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:5:28: error: 'M_PI' undeclared (first use in this function)
    5 |         output = 2 * input*M_PI;
      |                            ^~~~
main.c:5:28: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:9: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    6 |         printf("%.2f\n", output);
      |         ^~~~~~
main.c:6:9: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:6:9: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:6:9: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

int Question163A(void) {
	double input = 0;
	double output = 0;
	scanf("%lf", &input);
	output = 2 * input*M_PI;
	printf("%lf\n", output);
	return 0;
}

Compiler output:
main.c: In function 'Question163A':
main.c:4:9: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    4 |         scanf("%lf", &input);
      |         ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int Question163A(void) {
main.c:4:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    4 |         scanf("%lf", &input);
      |         ^~~~~
main.c:4:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:5:28: error: 'M_PI' undeclared (first use in this function)
    5 |         output = 2 * input*M_PI;
      |                            ^~~~
main.c:5:28: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:9: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    6 |         printf("%lf\n", output);
      |         ^~~~~~
main.c:6:9: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:6:9: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:6:9: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C++

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

int main() {
    double p;
    double pi = 3.14;
    cin >> p;
    cout << p * pi << end1;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:23: error: 'end1' was not declared in this scope
    8 |     cout << p * pi << end1;
      |                       ^~~~
Language: C

#include<stdc++.h>

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

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

#include <iostream>

#define PI 3.1415926

using namespace std;

int main() {

    int r;
    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: Java

import java.util.*;

public class main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int R = sc.nextInt();
		double x = 3.14;
		
		System.out.println(R * x);		
	}

}


Compiler output:
Main.java:3: error: class main is public, should be declared in a file named main.java
public class main {
       ^
1 error
Language: C

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

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


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

#include<stdio.h>
using namespace std;
int main()
{
  double x;
  cin>>x;
  cout<<2*3.14*x<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>x;
      |   ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include<stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout<<2*3.14*x<<endl;
      |   ^~~~
a.cc:7:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:7:19: error: 'endl' was not declared in this scope
    7 |   cout<<2*3.14*x<<endl;
      |                   ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include<stdio.h>
  +++ |+#include <ostream>
    2 | using namespace std;
Language: C++

#include<stdio.h>
using namespace std;
int main()
{
  double x;
  cin>>x;
  cout<<2*3.14*x<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>x;
      |   ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include<stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout<<2*3.14*x<<endl;
      |   ^~~~
a.cc:7:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:7:19: error: 'endl' was not declared in this scope
    7 |   cout<<2*3.14*x<<endl;
      |                   ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include<stdio.h>
  +++ |+#include <ostream>
    2 | using namespace std;
Language: C

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

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

int main(){
  int R;
  cin >> R;
  
  float pi = 3.14159265358979323846;
  float ans = 2 * R * pi;
  
  cout << ans << endl;
}

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

#include<bits/stdc++.h>
using namespace std;
int main(){
	double r;
	cin>>r;
	cout<<2*r*3.14<<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 <stdio.h>
#include <stdlib.h>

int main (int argc, char** argv) {
  printf("%lf", strtol(argv[1],10) * 2 * 3.141592);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:32: error: passing argument 2 of 'strtol' makes pointer from integer without a cast [-Wint-conversion]
    5 |   printf("%lf", strtol(argv[1],10) * 2 * 3.141592);
      |                                ^~
      |                                |
      |                                int
In file included from main.c:2:
/usr/include/stdlib.h:178:43: note: expected 'char ** restrict' but argument is of type 'int'
  178 |                         char **__restrict __endptr, int __base)
      |                         ~~~~~~~~~~~~~~~~~~^~~~~~~~
main.c:5:17: error: too few arguments to function 'strtol'
    5 |   printf("%lf", strtol(argv[1],10) * 2 * 3.141592);
      |                 ^~~~~~
/usr/include/stdlib.h:177:17: note: declared here
  177 | extern long int strtol (const char *__restrict __nptr,
      |                 ^~~~~~
Language: C

#include <stdio.h>
#include <stdlib.h>

int main (int argc, char** argv) {
  printf("%lf", strtol(argv[1]) * 2 * 3.141592);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:17: error: too few arguments to function 'strtol'
    5 |   printf("%lf", strtol(argv[1]) * 2 * 3.141592);
      |                 ^~~~~~
In file included from main.c:2:
/usr/include/stdlib.h:177:17: note: declared here
  177 | extern long int strtol (const char *__restrict __nptr,
      |                 ^~~~~~
Language: C

#include <stdio.h>
#include <stdlib.h>

int main (int argc, char** argv) {
  printf("%lf", argv[1] * 2 * 3.141592);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:25: error: invalid operands to binary * (have 'char *' and 'int')
    5 |   printf("%lf", argv[1] * 2 * 3.141592);
      |                 ~~~~~~~ ^
      |                     |
      |                     char *
Language: C

#include <stdlib.h>

int main (int argc, char** argv) {
  printf("%lf", argv[1] * 2 * 3.141592);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:3: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    4 |   printf("%lf", argv[1] * 2 * 3.141592);
      |   ^~~~~~
main.c:2:1: note: include '<stdio.h>' or provide a declaration of 'printf'
    1 | #include <stdlib.h>
  +++ |+#include <stdio.h>
    2 | 
main.c:4:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
    4 |   printf("%lf", argv[1] * 2 * 3.141592);
      |   ^~~~~~
main.c:4:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:4:25: error: invalid operands to binary * (have 'char *' and 'int')
    4 |   printf("%lf", argv[1] * 2 * 3.141592);
      |                 ~~~~~~~ ^
      |                     |
      |                     char *
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int n;
  cin>>n;
  double pi;
  pi = 6.28318530717958623200;
  cout<<n*pi;
  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 <stdio,h>
#define PI 3.14

int main( int argc, char** argv) {
  printf("%lf", 2 * atoi(argv[1]) * PI);
}

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

n = int(input())
print(n * 2 * 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:1:5: error: expected expression before 'int'
    1 | n = int(input())
      |     ^~~
Language: C

from math import pi
n = int(input())

print(2*n*pi)

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

#include<bits/stdc++.h>
using namespace std;
 int main()
 {
   long int n;
   int m,a[10000];
   cin>>n>>m;
   int s=0,i;
   for(i=0;i<m;i++) 
   {
     cin>>a[i];
   	 s+=a[i];
   }
   (n-s)>=? (cout<<n-s):(cout<<-1);
   return 0;
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:14:11: error: expected primary-expression before '?' token
   14 |    (n-s)>=? (cout<<n-s):(cout<<-1);
      |           ^
Language: Java

import java.util.Scanner;

public class abc163a {
    public static void main(String[] args){
        Scanner s=new Scanner(System.in);
        int r=s.nextInt();
        System.out.println(2*r*Math.PI);
    }
}

Compiler output:
Main.java:3: error: class abc163a is public, should be declared in a file named abc163a.java
public class abc163a {
       ^
1 error
Language: C

#include <bits/stdc++.h>
#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(x) (x).begin(),(x).end()
#define rrng(x) (x).rbegin(),(x).rend()
#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 show(x) cout << #x << " = " << (x) << endl
#define show2(x,y) cout << #x << " = " << (x) << ", " << #y << " = " << (y) << endl
#define show3(x,y,z) cout << #x << " = " << (x) << ", " << #y << " = " << (y) <<  ", " << #z << " = " << (z) << endl
#define showv(v) rep(i,v.size()) printf("%d%c", v[i], i==v.size()-1?'\n':' ')
#define showv2(v) rep(j,v.size()) showv(v[j])
#define showt(t,n) rep(i,n) printf("%d%c", t[i], i==n-1?'\n':' ')
#define showt2(t,r,c) rep(j,r) showt(t[j],c)
#define showvp(p) rep(i,p.size()) printf("%d %d\n", p[i].first, p[i].second);
#define printv(v) rep(i,v.size()) printf("%d\n", v[i])
#define printt(t,n) rep(i,n) printf("%d\n", t[i])
#define incl(v,x) find(rng(v),x)!=v.end()
#define incls(s,c) s.find(c)!=string::npos
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcountll
#define bit(n,k) ((n>>k)&1) // nのk bit目
#define bn(x) ((1<<x)-1)
#define dup(x,y) (((x)+(y)-1)/(y))
#define newline puts("")
#define uni(x) x.erase(unique(rng(x)),x.end())
#define SP << " " <<
#define v(T) vector<T>
#define vv(T) v(v(T))
using namespace std;
using ll = long long;
using ld = long double;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vs = vector<string>;
using P = pair<int, int>;
using T = tuple<int, int, int>;
using vp = vector<P>;
using vt = vector<T>;
const int mod = 1000000007;
const double EPS = 1e-9;
//const long double EPS = 1e-14;
const int INF = (1<<30)-1;
const ll LINF = (1LL<<62)-1;
#define dame { puts("No"); return 0;}
#define yn {puts("Yes");}else{puts("No");}
inline int in() { int x; scanf("%d",&x); return x;}
inline ll lin() { ll x; scanf("%lld",&x); return x;}
inline char chin() { char x; scanf("%c",&x); return x;}
inline string stin() { string x; cin >> x; return x;}
inline double din() { double x; scanf("%lf",&x); return x;}
//template<class T = int> inline T in() { T x; cin >> x; return (x);}
template<typename T>inline ll suma(const v(T)& a) { ll res(0); for (auto&& x : a) res += x; return res;}
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; }
char itoa(int n) { return n + '0';}
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 () {
  int r = in();
  double ans = 2*M_PI*r;
  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>

int main()
{
    float r;
    std::cin >> r;
    std::cout << 2.0f * r * M_PI << std::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;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef pair<int, int> P;

#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()

void YN(bool flg){if(flg) cout << "YES" << endl; else cout << "NO" << endl;}
void Yn(bool flg){if(flg) cout << "Yes" << endl; else cout << "No" << endl;}
void yn(bool flg){if(flg) cout << "yes" << endl; else cout << "no" << endl;}

const double PI=acos(-1.0);

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

    double ans = 2 * r * PI;

    printf("%.10f", 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

RI = int(input())
L = 2*pi*RI
print(RI)

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | RI = int(input())
      | ^~
main.c:1:1: error: type defaults to 'int' in declaration of 'RI' [-Wimplicit-int]
main.c:1:6: error: expected expression before 'int'
    1 | RI = int(input())
      |      ^~~
Language: C

#include<bits/stdc++.h>
#define PI 3.141592653589
using namespace std;

int main(){
  int r;

  cin >> r;

  cout << 2*PI*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++.h>
#define endl '\n'
using namespace std;
typedef long long ll;

int main()
{
    double r, ans;
    cin>>r;
    ans=2*3.1416*r;
    cout<<fixed<<setprecision(3)<<ans<<endl;
    return 0;
}


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

#include <bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;

int main()
{
    double r, ans;
    cin>>r;
    ans=2*3.1416*r;
    cout<<setprecision(3)<<fixed;
    cout<<ans;
    return 0;
}


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

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

int main()
{
  double ensyu;
  ll r;
  cin >> r;
  ensyu = r * 6.28318530717958623200;
  cout << ensyu << endl;
  return 0;
}  
  

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

#include <iostream>

int main(){
  int r
  std::cin >> r;
  std::cout << 3.1416 * 2 * r << std::endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: expected initializer before 'std'
    5 |   std::cin >> r;
      |   ^~~
a.cc:6:29: error: 'r' was not declared in this scope
    6 |   std::cout << 3.1416 * 2 * r << std::endl;
      |                             ^
Language: C++

include <bits/stdc++.h>
using namespace std;
using std::cin;
using std::cout;
 
int main(){
  int R;
  std::cin >> R;
  std::cout << R*3.141592*R << endl;
}


Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc:3:12: error: 'cin' has not been declared in 'std'
    3 | using std::cin;
      |            ^~~
a.cc:4:12: error: 'cout' has not been declared in 'std'
    4 | using std::cout;
      |            ^~~~
a.cc: In function 'int main()':
a.cc:8:8: error: 'cin' is not a member of 'std'
    8 |   std::cin >> R;
      |        ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | include <bits/stdc++.h>
a.cc:9:8: error: 'cout' is not a member of 'std'
    9 |   std::cout << R*3.141592*R << endl;
      |        ^~~~
a.cc:9:8: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:32: error: 'endl' was not declared in this scope
    9 |   std::cout << R*3.141592*R << endl;
      |                                ^~~~
Language: C++

include <bits/stdc++.h>
using namespace std;
 
int main(){
  int R;
  std::cin >> R;
  std::cout << R*3.141592*R << endl;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:8: error: 'cin' is not a member of 'std'
    6 |   std::cin >> R;
      |        ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | include <bits/stdc++.h>
a.cc:7:8: error: 'cout' is not a member of 'std'
    7 |   std::cout << R*3.141592*R << endl;
      |        ^~~~
a.cc:7:8: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:7:32: error: 'endl' was not declared in this scope
    7 |   std::cout << R*3.141592*R << endl;
      |                                ^~~~
Language: C++

include <bits/stdc++.h>
using namespace std;
 
int main(){
  int R;
  cin >> R;
  cout << R*3.141592*R << endl;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> R;
      |   ^~~
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout << R*3.141592*R << endl;
      |   ^~~~
a.cc:7:27: error: 'endl' was not declared in this scope
    7 |   cout << R*3.141592*R << endl;
      |                           ^~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
    float n;
    cin>>n;
    
    float pi = 3.14159;
    cout<<fixed<<setprecision(6)<<(2*pi*n)<<endl;

}

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

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define REP(i,n) for(ll i=0, i##_len=(n); i<i##_len; ++i)
#define REPR(i,n) for(ll i = n;i >= 0;--i)
#define FOR(i,m,n) for(ll i = m, i##_len=(n);i <i##_len; ++i)
#define all(x) (x).begin(),(x).end()
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; }
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
const int INF = 1e9;
const ll LLINF = 1e16;
 
ll modinv(ll a, ll m) {
    ll b = m, u = 1, v = 0;
    while (b) {
        ll t = a / b;
        a -= t * b; swap(a, b);
        u -= t * v; swap(u, v);
    }
    u %= m;
    if (u < 0) u += m;
    return u;
}


int main(void)
{
    ll r;
    cin >> r;
    cout << M_PI * 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;

typedef long long ll;
typedef vector<ll> vll;
typedef vector<vector<ll>> vvll;
typedef vector<vector<vector<ll>>> vvvll;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;
typedef vector<vector<vector<bool>>> vvvb;
typedef pair<ll, ll> pll;
typedef vector<pll> vpll;
typedef vector<vpll> vvpll;
typedef vector<double> vd;
typedef vector<vd> vdd;

#define FOR(i,x,y) for(ll i=(ll)x; i<(ll)y; ++i)
#define REP(i,y) FOR(i, 0, y)
#define RFOR(i,x,y) for(ll i=(ll)x; i>=(ll)y; --i)
#define RREP(i,x) RFOR(i, x, 0)
#define ALL(a) a.begin(), a.end()
#define pb push_back
#define debug_print(x...) cerr << "line " << __LINE__ << " : "; debug_print_in(x);

template <typename First>
void debug_print_in(First first){
  cerr << first << endl;
  return;
}

template <typename First, typename... Rest>
void debug_print_in(First first, Rest... rest){
  cerr << first << " ";
  debug_print_in(rest...);
  return;
}

void IN(void){
  return;
}

template <typename First, typename... Rest>
void IN(First& first, Rest&... rest){
  cin >> first;
  IN(rest...);
  return;
}

template <typename First>
void OUT(First first){
  cout << first << endl;
  return;
}

template <typename First, typename... Rest>
void OUT(First first, Rest... rest){
  cout << first << " ";
  OUT(rest...);
  return;
}

template<class t, class u> void chmax(t&a,u b){if(a<b)a=b;};
template<class t, class u> void chmin(t&a,u b){if(a>b)a=b;};
int popcount(int t){return __builtin_popcount(t);} //GCC
int popcount(ll t){return __builtin_popcountll(t);} //GCC

template <typename T>
void vec_print(vector<T> VEC){
  REP(i, VEC.size()){
    cerr << VEC[i] << " ";
  }
  cerr << endl;
};

template <typename T>
void mat_print(vector<vector<T> > MAT){
  REP(i,MAT.size()){
    REP(j,MAT[i].size()){
      cerr << MAT[i][j] << " ";
    }
    cerr << endl;
  }
};

constexpr int INF = (1<<30);
constexpr ll INFLL = 1LL<<62;
constexpr long double EPS = 1e-12;
constexpr ll MOD = (ll)((1E+9)+7);

int main(){
  cin.tie(0); // cut the cin and cout (default, std::flush is performed after std::cin)
  ios::sync_with_stdio(false); // cut the iostream and stdio (DON'T endl; BUT "\n";)

  ll R;
  IN(R);
  double Rd = (double)R;
  printf("%.12lf\n", 2*Rd*M_PI);

  return 0;
}

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

#include <iostream>
using namespace std;

int main() {
	int t;
	cin>>t;
	long double a=2*(3.1459265358)*t;
	cout<<a;
	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 < (int)(n); i++)
#define rep2(i, m, n) for(int i = (int)(m); i < (int)(n); i++)
#define rep_inv(i, n, m) for(int i = (int)(n); i > (int)(m); i--)
using namespace std;
using ll = long long;
using vl = vector<ll>;
using vc = vector<char>;
using vvl = vector<vl>;
using vvc = vector<vc>;
using pll = pair<ll, ll>;
using vpll = vector<pll>;

double pi = 3.1415926535;

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

  cout << setprecision(10) << fixed << 2.0 * (double)R * pi << endl;
  
  return 0;
}


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

#include <stdio.h>
 
double main(){
 double aaa;
 scanf("%d",&R);
 aaa = 2.0 * 3.14 * R;
 printf("%f¥n",aaa);
 return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:14: error: 'R' undeclared (first use in this function)
    5 |  scanf("%d",&R);
      |              ^
main.c:5:14: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

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

int main(){
  double n; 
  cin >> n;
  double ans = 3.141592653589793238 * n * 2;
  cout << set_ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: 'set_ans' was not declared in this scope; did you mean 'setns'?
    8 |   cout << set_ans;
      |           ^~~~~~~
      |           setns
Language: C

#include<stdio.h>

int main(){
 double aaa;
 aaa = 2.0 * 3.14 * R;
 return aaa;
}

Compiler output:
main.c: In function 'main':
main.c:5:21: error: 'R' undeclared (first use in this function)
    5 |  aaa = 2.0 * 3.14 * R;
      |                     ^
main.c:5:21: note: each undeclared identifier is reported only once for each function it appears in
Language: C

double aaa;
aaa = 2*3.14*R;

Compiler output:
main.c:2:1: warning: data definition has no type or storage class
    2 | aaa = 2*3.14*R;
      | ^~~
main.c:2:1: error: type defaults to 'int' in declaration of 'aaa' [-Wimplicit-int]
main.c:2:1: error: conflicting types for 'aaa'; have 'int'
main.c:1:8: note: previous declaration of 'aaa' with type 'double'
    1 | double aaa;
      |        ^~~
main.c:2:14: error: 'R' undeclared here (not in a function)
    2 | aaa = 2*3.14*R;
      |              ^
Language: C

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <math.h>
#include <vector>

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

#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#define TRUE (0)
#define FALSE (1)

// This value shold be close to used maximum value.  
#define NUM_MAX 20000000005

// void sort(uint32_t *num, uint32_t size);

int main()
{
    vector<vector<uint64_t>> arr(0);
    vector<uint64_t> temp_vec(2);
    vector<uint64_t> num_vec(0), red_vec(0), green_vec(0), white_vec(0);
    // string result;
    // vector<long long> res_vec(0);
    // uint64_t res_arr[NUM_MAX];
    // uint32_t sum = 0;
    uint64_t num1, white;
    uint64_t num, result, result2;
    // uint64_t result;
    double length, mass;

    // uint32_t res_i = 0;
    // string str_temp, str_temp2;
    int64_t temp, temp2, temp3;
    int64_t i, j, k, l, count, n, x, y, o, size, a, b, c;
    // uint32_t count = 0;
    // string str;
    // uint8_t k_flag;
    
    cin >> x;

    result = 2 * x * M_PI;

    cout << result << endl;

    return 0;
}

// void sort(uint32_t *num, uint32_t size) {
//     uint32_t i, j, k;
//     uint32_t sorted_num;
//     uint32_t array[NUM_MAX] = {0};

//     for (i = 1; i < size + 1; i++) {
//         array[num[i - 1]]++;
//     }

//     sorted_num = 0;

//     for (i = 0; i < NUM_MAX; i++) {
//         for (j = 0; j < array[i]; j++) {
//             num[j + sorted_num] = i;
//         }
//         sorted_num += j;
//         j = 0;
//     }

//     return;
// }


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

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

int main(){
  int r;cin >> r;
  float pi = 3.14159265358979;
  cout << 2*r*pi << endl;
  return 0;
}

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

#include <bits/stdc++.h>
#define rep(i, n) for(long long int i = 0; i < n; i++)
#define _rep(i, m, n) for(long long int i = m; i < n; i++)
#define print(n) std::cout << n << std::endl
#define _print(n) std::cout << n
using namespace std;
typedef long long ll;
typedef pair<int, int> P;
const int N = 1000000;
const ll mod = 1000000007;
using Graph = vector<vector<int>>;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};

ll gcd(ll A, ll B){
    if(B == 0)return A;
    return gcd(B, A % B);
}
ll lcm(ll A, ll B){
    return A * B / gcd(A, B);
}

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

int main(){
    double r; cin >> r;
    double ans = 2 * r * M.PI;
    cout << setpreciton(15) << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:26: error: 'M' was not declared in this scope
   27 |     double ans = 2 * r * M.PI;
      |                          ^
a.cc:28:13: error: 'setpreciton' was not declared in this scope
   28 |     cout << setpreciton(15) << ans << endl;
      |             ^~~~~~~~~~~
Language: C

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    float r;

    cin >> r;

    float s = r * r * 3.14f;

    cout << s;    
}

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

//keshavs first usaco solve :)
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
 
public class Main {
 
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
 
		Scanner sc = new Scanner(System.in);
		double r = sc.nextInt();
      	System.out.println(r*Math.PI*2);
      
	}
 
}

Compiler output:
main.c:3:1: error: unknown type name 'import'
    3 | import java.io.File;
      | ^~~~~~
main.c:3:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    3 | import java.io.File;
      |            ^
main.c:4:1: error: unknown type name 'import'
    4 | import java.io.FileNotFoundException;
      | ^~~~~~
main.c:4:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    4 | import java.io.FileNotFoundException;
      |            ^
main.c:5:1: error: unknown type name 'import'
    5 | import java.io.PrintWriter;
      | ^~~~~~
main.c:5:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    5 | import java.io.PrintWriter;
      |            ^
main.c:6:1: error: unknown type name 'import'
    6 | import java.util.Scanner;
      | ^~~~~~
main.c:6:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    6 | import java.util.Scanner;
      |            ^
main.c:8:1: error: unknown type name 'public'
    8 | public class Main {
      | ^~~~~~
main.c:8:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    8 | public class Main {
      |              ^~~~
Language: C++

//keshavs first usaco solve :)
import java.util.*;
 
public class Solution {
 
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
 
		Scanner sc = new Scanner(System.in);
		int r = sc.nextInt();
      	System.out.println(r*Math.PI*2);
      
	}
 
}

Compiler output:
a.cc:2:1: error: 'import' does not name a type
    2 | import java.util.*;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:1: error: expected unqualified-id before 'public'
    4 | public class Solution {
      | ^~~~~~
Language: C++

//keshavs first usaco solve :)
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
 
public class Solution {
 
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
 
		Scanner sc = new Scanner(System.in);
		double r = sc.nextInt();
      	System.out.print(r*Math.PI*2);
      
	}
 
}

Compiler output:
a.cc:3:1: error: 'import' does not name a type
    3 | import java.io.File;
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:1: error: 'import' does not name a type
    4 | import java.io.FileNotFoundException;
      | ^~~~~~
a.cc:4:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:1: error: 'import' does not name a type
    5 | import java.io.PrintWriter;
      | ^~~~~~
a.cc:5:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:6:1: error: 'import' does not name a type
    6 | import java.util.Scanner;
      | ^~~~~~
a.cc:6:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:8:1: error: expected unqualified-id before 'public'
    8 | public class Solution {
      | ^~~~~~
Language: Java

//keshavs first usaco solve :)
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
 
public class Solution.java {
 
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
 
		Scanner sc = new Scanner(System.in);
		int r = sc.nextInt();
      	System.out.println(r*Math.PI*2);
      
	}
 
}

Compiler output:
Main.java:8: error: '{' expected
public class Solution.java {
                     ^
1 error
Language: Java

//keshavs first usaco solve :)
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
 
public class Solution {
 
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
 
		Scanner sc = new Scanner(System.in);
		int r = sc.nextInt();
      	System.out.println(r*Math.PI*2);
      
	}
 
}

Compiler output:
Main.java:8: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
1 error
Language: Java

//keshavs first usaco solve :)
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
 
public class Solution {
 
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
 
		Scanner sc = new Scanner(new File("mixmilk.in"));
		int r = sc.nextInt();
      	System.out.println(r*Math.PI*2);
      
	}
 
}

Compiler output:
Main.java:8: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
1 error
Language: Java

//keshavs first usaco solve :)

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Solution {

	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub

		Scanner sc = new Scanner(new File("mixmilk.in"));
		int r = sc.nextInt();
      	System.our.println(r*Math.PI*2);
      
	}

}


Compiler output:
Main.java:8: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
Main.java:15: error: cannot find symbol
      	System.our.println(r*Math.PI*2);
      	      ^
  symbol:   variable our
  location: class System
2 errors
Language: Java



import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Solution {

	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub

		Scanner sc = new Scanner(System.in);
      	int radius = sc.nextInt();
      
      	System.out.println(2*Math.PI*radius);
		

}


Compiler output:
Main.java:19: error: reached end of file while parsing
}
 ^
1 error
Language: C

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

int main(){
    int R;
    cin>>R;
double answer=2*R*acos(-1);
printf("%.10f¥n", answer);
cout<<answer<<endl;
    return 0;
}

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

public class Test{
 public static void main(String[] args){
   Scanner scan = new Scanner(System.in);
   String str = scan.nextLine();
   int r = Integer.parseInt(str);
   double ans = 2 * r * 3.14;
   System.out.println(ans);
 }
}

Compiler output:
Main.java:1: error: class Test is public, should be declared in a file named Test.java
public class Test{
       ^
Main.java:3: error: cannot find symbol
   Scanner scan = new Scanner(System.in);
   ^
  symbol:   class Scanner
  location: class Test
Main.java:3: error: cannot find symbol
   Scanner scan = new Scanner(System.in);
                      ^
  symbol:   class Scanner
  location: class Test
3 errors
Language: C

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define all(v) (v).begin(),(v).end()
#define debug(x) cout << #x << '=' << x << '\n'
const long long MOD=1e9+7;
//const long long MOD=998244353;
const int INF=1e9;
const long long IINF=1e18;
const int dx[4]={1,0,-1,0};
const int dy[4]={0,1,0,-1};
const char dir[4]={'D','R','U','L'};
const double pi=acos(-1);

template<typename T>
istream &operator>>(istream &is,vector<T> &v){
    for (T &x:v) is >> x;
    return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &v){
    for (int i=0;i<v.size();++i){
        os << v[i] << (i+1==v.size()?'\n':' ');
    }
    return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const pair<T,U> &p){
    cout << '(' << p.first << ',' << p.second << ')';
    return os;
}

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(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    double R; cin >> R;
    cout << 2*R*pi << '\n';
}

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

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

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

        cout << 2 * R * M_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 <algorithm>
#include <iostream>
#include <vector>
#include <string>
#include <sstream>
#include <utility>

using namespace std;

typedef pair<int,int> pii;
typedef vector<int> vi;

int main () {
    // N
    // A_1 ...... A_N
    int R;
    cin >> R;
    cout << 2*3.14*R << 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 <iostream>
using namespace std;
int main()
{
  int r;
  cin >> r;
  float c;
  c = 3.14 * 2(r);
  cout << c;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: expression cannot be used as a function
    8 |   c = 3.14 * 2(r);
      |              ~^~~
Language: C

#include<iostream>
#include<math.h>
using namespace std;
int main()
{
int r;
double circumference;
cin>>r;
circumference=2*3.1416*r;
cout<<circumference;
}



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

#include <bits/stdc++.h>

using namespace std;

int main() {
  double n;
  cin >> n;
  cout << 3.1415926535 * n * 2.0 << "\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

// 2020 04 25

#include <iostream>
#include <fstream>
#include <math.h>
#include <string>

using namespace std;

int main(){

  int r;
  const double PI = 3.1415926535;

  cin >> r;
  cout << 2 * PI * r;
}


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

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int R,
  cout<<2*3.14*R<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: expected initializer before '<<' token
    6 |   cout<<2*3.14*R<<endl;
      |       ^~
Language: C

#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<sstream>
#include<string>
#include<algorithm>
#include<math.h>
#include<iomanip>
#include<vector>
#include<queue>
#include<deque>
#include<list>
#include<set>
#include<map>
#include<bitset>
#include<iterator>
#include <stack>
#define ll long long
typedef long double ld;
#define all(v) ((v).begin()),((v).end())
#define vec2(n,m) vector<vector<ll>>vv(n + 10, vector<ll>(m + 10, 0));
#define p_q1   priority_queue<int,vector<int>,greater<int>>pq1;
#define format(n) fixed<<setprecision(n)
#define ll_min LLONG_MIN;
#define ll_max LLONG_MIN;
#define endl "\n"
#define F first 
#define S second
#define mkpr(x,y)  make_pair(x,y)
using namespace std;
void weza()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
}
int main()
{
    weza();
    double n;
    cin >> n;
    cout << format(2);
    cout << 2 * n * 22/7<< endl;
}

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

#include <bits/stdc++.h>
using namespace std;
#define pi 3.1415
int main() {
  int R;
  cin >> R;
  cout << R*pi << endl;
}

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

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

int main() {
  int r;

  cin >> r;

  cout << 2 * r * 3.14;

  return 0;
}

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

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

Compiler output:
main.c: In function 'main':
main.c:7:20: error: implicit declaration of function 'PI' [-Wimplicit-function-declaration]
    7 |   printf("%lf",2*r*PI());
      |                    ^~
Language: C

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

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


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

#include<stdio.h>
#include<math.h>
int main()
{
  double r;
  scanf("%d",&r);
  printf("%f", 2*r*PI());
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:20: error: implicit declaration of function 'PI' [-Wimplicit-function-declaration]
    7 |   printf("%f", 2*r*PI());
      |                    ^~
Language: C

#include<iostream>

using namespace std;
int main()
{
    double n,m=3.1416;
    cin>>n;
    cout<<(2*m*n)<<endl;


    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); ++i)
#define fi first
#define se second
#define INF 1000000009
#define LLINF 1000000000000000009LL
using ll = long long;

int main() {
  int r;
  cin >> r;
  printf("%.10f\n", r * 2 * acos(-1));
  return(0);
}


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

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

int main() {

  int R;
  cin >> R;
  double P;
    P= 3.1415926535;
    cout << P*R*2 << endl;
}

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

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

int main() {

  int R;
  cin >> R;
  double P;
    P= 3.1415926535;
    cout << P*R*2 << endl;
}


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

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

int main() {

  int R;
  cin >> R;
  double P;
    P= 3.1415926535;
    cout << 2*P*R << endl;
}

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

import java.util.*

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

Compiler output:
Main.java:1: error: ';' expected
import java.util.*
                  ^
Main.java:3: error: '{' expected
public class Main() {
                 ^
2 errors
Language: C

#include <bits/stdc++.h>

using namespace std;

#define ll long long 
#define pi 3.14159265358979323

void solve(){
    double r;
    cin>>r;
    cout<<fixed<<setprecision(10)<<pi*2*r;
}

int main() {
    int t = 1;
    while(t--)
        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<bits/stdc++.h>
using namespace std;



int main(){
        ios::sync_with_stdio(0);
        cin.tie(0);
        //freopen("input.txt","r/w",stdin/stdout);
        float t;
        cin>>t;
        t*=2*3.14;
        cout<<t;
        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.