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

#include <iostream>
define PI 3.1415926
using namespace std;
  
int main()
{
  int r;
  cin >> r;
  cout << 2 * PI * r << endl;
}


Compiler output:
a.cc:2:1: error: 'define' does not name a type
    2 | define PI 3.1415926
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:8:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |   cin >> r;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |   cout << 2 * PI * r << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:15: error: 'PI' was not declared in this scope
    9 |   cout << 2 * PI * r << endl;
      |               ^~
a.cc:9:25: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |   cout << 2 * PI * r << endl;
      |                         ^~~~
      |                         std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C

#include<iostream>
#include<algorithm>
#include<vector>
#include<map>
#include<cmath>
#include<string>
#include<bitset>
#include <sstream>
#include<queue>
#include<stack>
#include<iomanip>
#include<functional>
#define rep(i,n) for(ll i=0;i<(n);++i)
#define sayyes cout<<"Yes"<<endl;
#define sayno cout<<"No"<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int>P;
const int mod =1e9+7;
 
int main()
{
    int n;
    cin>>n;
    cout<<(double)(2.0*n*3.1415);
    
}

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

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

int main() {
    int r;
    float pi=3.14,area,ci;
    clrscr();
    scanf("%d",&r);
    ci=2*pi*r;
    printf("%f",ci);
    getch();
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'clrscr' was not declared in this scope
    7 |     clrscr();
      |     ^~~~~~
a.cc:11:5: error: 'getch' was not declared in this scope; did you mean 'getc'?
   11 |     getch();
      |     ^~~~~
      |     getc
Language: C++

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

const double PI = 3.14

int32_t main(){
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int r;
  cin >> r;
  cout << 2*r*PI << "\n";
}

Compiler output:
a.cc:6:1: error: expected ',' or ';' before 'int32_t'
    6 | int32_t main(){
      | ^~~~~~~
Language: C

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin>>n;
    cout<<fixed<<setprecision(12);
    const double pi=3.14;
    cout<<2*pi*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;
#define PI 3.14
double circum(double r){
	double cir=2*PI*r;
	return cir;
}
int main(){
	ios base:: sync_with_stdio(false)
cin.tie(NULL);
	double r;
	cin>>r;
	cout<<circum(r);
	return 0;
}
	

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

#include <iostream>
define PI 3.1415926
using namespace std;
  
int main()
{
  int r;
  cin >> r;
  cout << PI * r * r << endl;
}

Compiler output:
a.cc:2:1: error: 'define' does not name a type
    2 | define PI 3.1415926
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:8:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |   cin >> r;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |   cout << PI * r * r << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:11: error: 'PI' was not declared in this scope
    9 |   cout << PI * r * r << endl;
      |           ^~
a.cc:9:25: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |   cout << PI * r * r << endl;
      |                         ^~~~
      |                         std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C

#include<iostream.h>
usin namespace std;
int main(){
  double N;
  cin>>N;
  cout<<N*3.1415;
 return 0; 
}

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

#include<bits/stdc++.h>
using namespace std;
#define PI 3.14
double circum(double r){
	double cir=2*PI*r;
	return cir;
}
int main(){
	
	double r;
	cin>>r;
	cout<<circum(r);
	return 0;
}
	

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

#include<stdio.h>
#include<math.h>
#define M_PI 3.14159265358979
int main(void){
    float R = 0;
    scanf("%f",R);
    R = 2.0 * M_PI * R; 
    R = R % 100.0;
    printf("%f",R);
    return R;
}

Compiler output:
main.c:3:9: warning: "M_PI" redefined
    3 | #define M_PI 3.14159265358979
      |         ^~~~
In file included from main.c:2:
/usr/include/math.h:1121:10: note: this is the location of the previous definition
 1121 | # define M_PI           3.14159265358979323846  /* pi */
      |          ^~~~
main.c: In function 'main':
main.c:8:11: error: invalid operands to binary % (have 'float' and 'double')
    8 |     R = R % 100.0;
      |           ^
Language: C++

#include <iostream>
using namespace std;
int main() {
    doubl a; cin >> a;
    cout << a * 6.28318530717958623200 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'doubl' was not declared in this scope; did you mean 'double'?
    4 |     doubl a; cin >> a;
      |     ^~~~~
      |     double
a.cc:4:21: error: 'a' was not declared in this scope
    4 |     doubl a; cin >> a;
      |                     ^
Language: C

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

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

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const double pi = std::atan(1.0)*4;
int main()
{
  ll r;
  cin>>r;
  cout<<(2*pi*r);
  return 0;
}


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

#include<stdio.h>
#include<math.h>
int main(void){
    scanf("%f",r);
    r = 2.0 * 3.14 * r; 
    r = fmod(r,100);
    printf("%f",r);
    return r;
}

Compiler output:
main.c: In function 'main':
main.c:4:16: error: 'r' undeclared (first use in this function)
    4 |     scanf("%f",r);
      |                ^
main.c:4:16: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<bits/stdc++.h>

using namespace std;

#define S scanf
#define P printf
#define G getline
#define SZ size()
#define C clear()
#define B begin()
#define F front()
#define T top()
#define E end()
#define EM empty()
#define V vector
#define Q queue
#define DQ deque
#define PQ priority_queue
#define ST stack
#define FI first
#define SE second
#define PI acos(-1)
#define PS push
#define PP pop()
#define PSF push_front
#define PSB push_back
#define PPF pop_front()
#define PPB pop_back()
#define MP make_pair
#define LL long long int
#define ULL unsigned long long int
#define PII pair<int,int>
#define PSI pair<string,int>
#define PIS pair<int,string>
#define PLI pair<long long int,int>
#define PLL pair<long long int,long long int>
#define MII map<int,int>
#define MSI map<string,int>
#define MIS map<int,string>
#define MLI map<long long int,int>
#define FAST() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)





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






int main()
{
    FAST();

//    freopen("input.txt","r",stdin);
//    freopen("output.txt","w",stdout);

    double x;
    cin >> x;
    cout << fixed << setprecision(10) << 2.0*PI*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 N;
 cin >> N;
 vector<int> vec(N-1);
 for (int i=0; i < (N-1); i++) {
 cin >> vec.at(i);
 }
 for (int j=0; j<N; j++) {
 if(j<N-1) {
  cout << count(vec.begin(), vec.end(), j+1) <<endl;
 }
 else (j==N-1) {
   cout << 0 << endl;
 }
 }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: expected ';' before '{' token
   15 |  else (j==N-1) {
      |               ^~
      |               ;
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  ios_base::synv_with_stdio(0);
  cin.tie(0);
  int r;
  double c=6.28*double(r);
  cout<<fixed<<setprecision(2)<<c<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: error: 'synv_with_stdio' is not a member of 'std::ios_base'
    5 |   ios_base::synv_with_stdio(0);
      |             ^~~~~~~~~~~~~~~
Language: C++

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

int main() {
 int N;
 cin >> N;
 vector<int> vec(N-1);
 for (int i=0; i < (N-1); i++) {
 cin >> vec.at(i);
 }
 for (int j=0; j<N; j++) {
 if(j<N-1) {
  cout << count(vec.begin(), vec.end(), j+1) <<endl;
 }
 else (j==N-1){
   cout << 0 << endl;
 }
 }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: expected ';' before '{' token
   15 |  else (j==N-1){
      |               ^
      |               ;
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
 
int main() {
     ios::sync_with_stdio(false);
     ll t;
     cin>>t;
     ll pi=3.1414;
    ll area;
  area=2*pi*t;
  cout<<area<<endl;
     }
	return 0;
}
 


Compiler output:
a.cc:4:1: error: extended character   is not valid in an identifier
    4 |  
      | ^
a.cc:4:1: error: '\U000000a0' does not name a type
    4 |  
      | ^
a.cc:14:9: error: expected unqualified-id before 'return'
   14 |         return 0;
      |         ^~~~~~
a.cc:15:1: error: expected declaration before '}' token
   15 | }
      | ^
Language: C++

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

using namespace std;

typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pt;
typedef pair<ll,ll> pll;

#define vint vector<int>
#define vll vector<long long>
#define endl '\n'
#define fi first
#define se second
#define pb push_back
#define F(i,n) for(ll i = 0;i<n;i++)
#define Fr(i,l,r) for(ll i = l;i <= r;i++)
#define rF(i,n) for(ll i = n-1;i>=0;i--)

#define fastio ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL)


int main()
{
    fastio;
    
    ll t1;
   // cin >> t1;
    t1=1;
    while(t1--)
    {
        ll n,i1,i2,k,m,j,j1,f,a1,i31,i3,j2,i5,i4,i6,i7,i;    
        i4=INT_MIN,i1=0;
        f=0;
        ll res,res1;
        ll s1,s2,s3;
        s2=0;
        s1=0;
        double pi=3.141592653589793238;
        cin>>n;
        cout<<2*pi*n;
        
       
      }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:39:12: error: 'INT_MIN' was not declared in this scope
   39 |         i4=INT_MIN,i1=0;
      |            ^~~~~~~
a.cc:7:1: note: 'INT_MIN' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    6 | #include<set>
  +++ |+#include <climits>
    7 | #include<string>
Language: C

#include<bits/stdc++.h>
using namespace std;
#define PI 3.415
double circum(double r){
	double cir=2*PI*r;
	return cir;
}
int main(){
	double r;
	cout<<circumference(r);
	return 0;
}
	

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

import math

user = int(input())
print((math.pi)*2*user)

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:3:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'user'
    3 | user = int(input())
      | ^~~~
Language: C++

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

using namespace std;

typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pt;
typedef pair<ll,ll> pll;

#define vint vector<int>
#define vll vector<long long>
#define endl '\n'
#define fi first
#define se second
#define pb push_back
#define F(i,n) for(ll i = 0;i<n;i++)
#define Fr(i,l,r) for(ll i = l;i <= r;i++)
#define rF(i,n) for(ll i = n-1;i>=0;i--)

#define fastio ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL)

ll ncr(ll n,ll r){if(n==1 || r==0)return 1;if(r>n/2)r=n-r;
	ll ans=1;for(ll i=1;i<=r;i++){ans=((ans * n )/i);n--;}return ans;
}
ll ncrsum(ll n,ll r, ll mod){
    if(n==1 || r==0)return 1;

}
int main()
{
    fastio;
    
    ll t1;
   // cin >> t1;
    t1=1;
    while(t1--)
    {
        ll n,i1,i2,k,m,j,j1,f,a1,i31,i3,j2,i5,i4,i6,i7,i;    
        i4=INT_MIN,i1=0;
        f=0;
        ll res,res1;
        ll s1,s2,s3;
        s2=0;
        s1=0;
        double pi=3.141592653589793238;
        cin>>n;
        cout<<2*pi*n;
        
       
      }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:45:12: error: 'INT_MIN' was not declared in this scope
   45 |         i4=INT_MIN,i1=0;
      |            ^~~~~~~
a.cc:7:1: note: 'INT_MIN' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    6 | #include<set>
  +++ |+#include <climits>
    7 | #include<string>
a.cc: In function 'll ncrsum(ll, ll, ll)':
a.cc:34:1: warning: control reaches end of non-void function [-Wreturn-type]
   34 | }
      | ^
Language: C

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

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

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;


public class hef {
	

	
	
	public static void main(String[] args) {

		
		Scanner s = new Scanner(System.in);
		
		int n = s.nextInt();
		
		System.out.println(2*Math.PI*n);
		
	}
}

Compiler output:
Main.java:6: error: class hef is public, should be declared in a file named hef.java
public class hef {
       ^
1 error
Language: C

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int r;
    cin>>r;
    cout<<2*3.14159265359*r;
    return 0;
}   

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

#include<stdio.h>
int main()
{
    int vacation,assignment,i,arr[20],sum=0,ans;
    scanf("%d %d",&vacation,&assignment);
    for(i=0;i<assignment;i++)
    {
        scanf("%d",&arr[i]);
        sum=sum+arr[i];
    }
    ans=vacation-sum;
    if(ans<0)
    {
        printf("-1");
    }
    else
    {
        printf("%d",ans);
    }
return 0

}


Compiler output:
main.c: In function 'main':
main.c:20:9: error: expected ';' before '}' token
   20 | return 0
      |         ^
      |         ;
   21 | 
   22 | }
      | ~
Language: C

#include <stdio.h>

void seq(int num,int a[],int b[]){
  for(int i=0;i<num-1;i++){
    static int b[i] = 0;
    b[a[i]]++;
  }
  return ;
}

int main(void){
  int num;
  scanf("%d",&num);
  int a[num-1];
  int b[num];
  for(int i=0;i<num-1;i++){
  scanf("%d",&a[i]);
  }
  seq(num,a,b);
  for(int i=0;i<num;i++){
  printf("%d\n",b[i]);
  }
  return 0;
}


Compiler output:
main.c: In function 'seq':
main.c:5:23: error: variable-sized object may not be initialized except with an empty initializer
    5 |     static int b[i] = 0;
      |                       ^
main.c:5:16: error: storage size of 'b' isn't constant
    5 |     static int b[i] = 0;
      |                ^
Language: C

M, N = map(int ,input().split())
x = [int(x) for x in input().split()]
if (sum(x)) > M:
    print(-1)
elif(sum(x) == M):
    print(0)
elif(sum(x)<M):
    print(M-sum(x))

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | M, N = map(int ,input().split())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'M' [-Wimplicit-int]
main.c:1:4: error: type defaults to 'int' in declaration of 'N' [-Wimplicit-int]
    1 | M, N = map(int ,input().split())
      |    ^
main.c:1:8: error: implicit declaration of function 'map' [-Wimplicit-function-declaration]
    1 | M, N = map(int ,input().split())
      |        ^~~
main.c:1:12: error: expected expression before 'int'
    1 | M, N = map(int ,input().split())
      |            ^~~
main.c:2:1: error: expected ',' or ';' before 'x'
    2 | x = [int(x) for x in input().split()]
      | ^
Language: C

#define _USE_MATH_DEFINES
#include<iostream>
#include<iomanip>
#include<cmath>

using namespace std;

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

    cout << fixed << setprecision(15) << 2*num*M_PI << endl;
    return 0;
}

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;

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

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

#include<stdio.h>
#include<math.h>
int main(void){
    float R = 0;
    scanf("%f",R);
    R = 2.0 * M_PI * R; 
    R%=100.0;
    printf("%f",R);
    return R;
}

Compiler output:
main.c: In function 'main':
main.c:7:6: error: invalid operands to binary % (have 'float' and 'double')
    7 |     R%=100.0;
      |      ^~
Language: C

#include<stdio.h>
#include<math.h>
int main(void){
    float R = 0;
    scanf("%f",R);
    R = 2.0 * M_PI * R; 
    R%=100;
    printf("%f",R);
    return R;
}

Compiler output:
main.c: In function 'main':
main.c:7:6: error: invalid operands to binary % (have 'float' and 'int')
    7 |     R%=100;
      |      ^~
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 pb push_back
using namespace std;
using P = pair<int,int>;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef tuple<int,int,int> T;
typedef vector<P> vp;
typedef vector<T> vt;
const double PI=3.141592653589;

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


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

#include <bits/stdc++.h>
#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 pb push_back
using namespace std;
using P = pair<int,int>;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef tuple<int,int,int> T;
typedef vector<P> vp;
typedef vector<T> vt;
const double PI=3.141592653589;;

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


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

import java.util.Scanner;

public class A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double a = 0;
        int x = sc.nextInt();
        a = Math.PI * x;
        System.out.println(a);
    }
}

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

#include<stdio.h>
 
int main()
{
  int a;
  float b;
  a=2
  b=a*a*3.1415;
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:6: error: expected ';' before 'b'
    7 |   a=2
      |      ^
      |      ;
    8 |   b=a*a*3.1415;
      |   ~
Language: C

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

int main(){
  int R, answer;
  cin >> R;
  answer = R * 2 * 3.14;
  cout << answer << 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: Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long a = 0L;
        int x = sc.nextInt();
        a = Math.PI *(double) x;
        System.out.println(a);
    }
}

Compiler output:
Main.java:8: error: incompatible types: possible lossy conversion from double to long
        a = Math.PI *(double) x;
                    ^
1 error
Language: C

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

using namespace std;

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

    cout << 2*num*M_PI << endl;
    return 0;
}

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

import java.util.Scanner;

public class C {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int N = scanner.nextInt();

        int[] A = new int[N];

        A[0] = 0;

        for(int i = 1; i < A.length; i++) {
            A[i] = scanner.nextInt();
        }

        int num = 0;    //直属の部下の人数

        for(int i = 0; i < A.length; i++) {
            for(int j = i + 1; j < A.length; j++) {
                if(A[j] == A[i] + 1) {
                    num++;
                }
            }
            if(i > 0) {
                if(A[i] == A[i - 1]) {
                    num = 0;
                }
            }
            System.out.println(num);    //直属の部下の人数を表示
            num = 0;
        }
    }
}

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

import java.util.Scanner;

public class MAin {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long a = 0L;
        int x = sc.nextInt();
        a = Math.PI * x;
        System.out.println(a);
    }
}

Compiler output:
Main.java:3: error: class MAin is public, should be declared in a file named MAin.java
public class MAin {
       ^
Main.java:8: error: incompatible types: possible lossy conversion from double to long
        a = Math.PI * x;
                    ^
2 errors
Language: C

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

int main() {
 int R;
  cin >> R;
  double W=2*3.1415926535*R;
    cout << W <<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,pai=3.14159265358979323846;
	cin >> r;
	double c;
	c = 2*r*pai;
	cout<<fixed<<setprecision(20)<<c;
	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 << R*2*3.14<< endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: expected ';' before 'cout'
    6 |   cin>>R
      |         ^
      |         ;
    7 |   cout << R*2*3.14<< endl;
      |   ~~~~
Language: C

#include <iostream>
#include <list>
#include <iterator>
#include <algorithm>
#include <bits/stdc++.h>
#include <bitset>
#include <set>
#include <stdio.h>
#include <cmath>
 
#define loop(i,n)   for(i=0;i<n;i++)
#define ll          long long
#define MAX         10000001
#define pi          acos(-1)

ll i,j,k,cnt,sum;
 
using namespace std;

bitset<MAX> prime;

void seive(){
	prime[0] = 1;
	prime[1] = 1;
	prime[2] = 0;

	for(i=4;i<MAX;i+=2){
		prime[i] = 1;
	}

	for(i=3;i*i<=MAX;i+=2){
		if(!prime[i]){
			for(j=i+i;j<MAX;j+=i){
				prime[j] = 1;
			}
		}
	}
}


//Code Starts Here//
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);

	int r;
	cin>>r;

	cout<<r*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

#include<cstdio>
#include<cstring>
#include<string>
#include<iostream>
#include<cmath>
#include<algorithm>
#include<queue>
#include<map>
#include<ctime>

using namespace std;

template <typename T>

inline T read()
{
	T x=0,f=1;char c=getchar();
	while(!isdigit(c))
	{if(c=='-') f=-f;c=getchar();}
	while(isdigit(c))
	{x=(x<<3)+(x<<1)+(c-48);c=getchar();}
	return x*f;
}

#define lint long long int
#define ulint unsigned lint

const int inf=1e9+1e7;
const double PI=3.1415926;

int main(void)
{

	// freopen("testdata.in","r",stdin);
	// freopen("testdata.out","w",stdout);

	double n;

	cin>>n;

	cout<<2*n*PI<<endl;

	return 0;

}


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

#include <bits/stdc++.h>
using namespace std;
constexpr long long MOD = 1000000007;
using ll = long long;
int main() {
ll r;
cin >> r;
cout << fixed << setprecision(10) << 2 * 3.1415926535 * 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.Scanner;

public class test1{
public static void main(String[]args){
  final double PI = 3.141592;
  Scanner stdIn = new Scanner(System.in);
  double r = stdIn.nextDouble();
  System.out.println(2 * PI * r );

 }
 }

Compiler output:
Main.java:3: error: class test1 is public, should be declared in a file named test1.java
public class test1{
       ^
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 <bits/stdc++.h>

using namespace std;

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



Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: 'R' was not declared in this scope
    6 |     cin >> R;
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  double r;
  cin >> r;
  r = r * 3.141592653
  cout << r;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:22: error: expected ';' before 'cout'
    7 |   r = r * 3.141592653
      |                      ^
      |                      ;
    8 |   cout << r;
      |   ~~~~
Language: C

#include<iostream>
#include<cmath>
using namespace std;
double const pi=3.14;
int main(){
	int a;
	cin>>a; 
	cout<<a*pi<<endl;
	
}

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

# include <iostream>
 
using namespace std;
 
int main () {
  long double a;
  cin>>a;
  long double a,answer=answer*2*(3.14159);
  cout<<answer;
  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: redeclaration of 'long double a'
    8 |   long double a,answer=answer*2*(3.14159);
      |               ^
a.cc:6:15: note: 'long double a' previously declared here
    6 |   long double a;
      |               ^
Language: C

#include<"stdio.h">
#include<"math.h">
int main(void){
	double R = 0; 
    scanf("%lf",R);
  	R *= M_PI;
    printf("%lf",R);
	return 0;
}

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

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

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


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

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

int main()
{
	double r,pai=3.14159265358979323846;
	cin >> r;
	double c;
	c = 2*r*pai;
	cout<<fixed<<setprecision(20)<<c<<endl;
	return 0; 
 } 

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

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:9:21: error: expected ';' before 'cout'
    9 |   x = 2 * R * 3.1415
      |                     ^
      |                     ;
   10 | 
   11 |     cout << x << endl;
      |     ~~~~
Language: C++

#include<bits/stdc++.h>
using naemsapce std;
int main()
{
  int a;
  printf("%.7lf",a*2*3.1415926535897932384626433832795);
  return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'naemsapce'
    2 | using naemsapce std;
      |       ^~~~~~~~~
Language: C++

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

int main()
{
int R,S;
cin << R;
S = (R+R)*3.14;
cout >> S;
}

Compiler output:
In file included from a.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio.h:23:3: error: #error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
   23 | # error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
      |   ^~~~~
a.cc: In function 'int main()':
a.cc:7:1: error: 'cin' was not declared in this scope
    7 | cin << R;
      | ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <bits/stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:9:1: error: 'cout' was not declared in this scope
    9 | cout >> S;
      | ^~~~
a.cc:9:1: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C

#include<bits/stdc++.h>
using namespace std;
int main(){
  double a;
  cin>>a;
  cout<<a*6.28<<endl;
}

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

#include<bits/stdc++.h>
using namespace std;
int main()
{
    
    long long int a,b,r;
    cin>>r;
    b=2*22/7*r:
        cout<<b;
        
    
    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: found ':' in nested-name-specifier, expected '::'
    8 |     b=2*22/7*r:
      |               ^
      |               ::
a.cc:8:14: error: 'r' is not a class, namespace, or enumeration
    8 |     b=2*22/7*r:
      |              ^
Language: C

//Author: AnandRaj uux
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pii> vpii;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pll> vpll; 

#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define test() int t;cin>>t;while(t--)
#define forn(i,f,n) for(int i=f;i<f+n;i++)
#define rforn(i,l,n) for(int i=l;i>l-n;i--)
#define all(v) v.begin(),v.end()
#define prin(V) for(auto v:V) cout<<v<<" ";cout<<endl
#define take(V,f,n) for(int i=f;i<f+n;i++) cin>>V[i]
#define what(x) cerr<<#x<<" = "<<x<<endl
#define KStest() int t,t1;cin>>t;t1=t;while(t--)
#define KScout cout<<"Case #"<<t1-t<<": "

const int MOD = 1e9+7,MAX = 1e5+5;
/////////////////FastExp///////////////////
ll powN(ll a,ll p)
{
	if(p==0) return 1;
	ll z=powN(a,p/2);
	z=(z*z)%MOD;
	if(p%2) z=(z*a)%MOD;
	return z;
}
/////////////////FastExp///////////////////
//////////////////Sieve////////////////////
vector<bool> is_prime(MAX+1, true);
void Sieve()
{
	is_prime[0] = is_prime[1] = false;
	int i,j;
	for (i = 2; i*i <= MAX; i++) 
	{
    	if (is_prime[i]) 
    	{
        	for (j = i * i; j <= MAX; j += i)
            	is_prime[j] = false;
    	}
	}
}
//////////////////Sieve////////////////////

const double pi = 3.1415926;

int main()
{
	double R;
	cin>>R;
	printf("%.6lf\n",2*pi*R);
}		

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

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

int main(){
	int r;
	cin>>r;
	
	cout<<r*2*3.1415926535<<setprecision(10)<<endl;
	return 0;
}

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

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

int main(){
    double p = 6.28318530717958623200/2;
    int r;
    cin >> r;
    cout << r*p*2
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: expected ';' before 'return'
    8 |     cout << r*p*2
      |                  ^
      |                  ;
    9 |     return 0;
      |     ~~~~~~
Language: C

#include<stdio.h>
 
#define S 120000
 
int main(){
	int i,N,j;
	int a[S];
	int n[S] = {0};
	scanf("%d",&N);
	
	for(i = 2; i < N + 1; i++){
		scanf("%d",&a[i]);
	}
	for(j = 1;j < N + 1; j++){
		for(i = 2; i < N + 1; i++){
			if( j== a[i]){
				n[j] += 1;
			}}
			printf("%d\n",n[j]);
	}
}
#include<stdio.h>

#define S 120000

int main(){
	int i,N,j;
	int a[S];
	int n[S] = {0};
	scanf("%d",&N);
	
	for(i = 2; i < N + 1; i++){
		scanf("%d",&a[i]);
	}
	for(j = 1;j < N + 1; j++){
		for(i = 2; i < N + 1; i++){
			if( j== a[i]){
				n[j] += 1;
			}}
			printf("%d\n",n[j]);
	}
}


Compiler output:
main.c:26:5: error: redefinition of 'main'
   26 | int main(){
      |     ^~~~
main.c:5:5: note: previous definition of 'main' with type 'int()'
    5 | int main(){
      |     ^~~~
Language: C++

#include<iostream>
using namespace std;
int main(){
  long long double a;
  cin>>a;
  cout<<a*3.1415926535<<endl;}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:8: error: 'long long' specified with 'double'
    4 |   long long double a;
      |        ^~~~
Language: C

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

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


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

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.StringTokenizer;
class InputReader {
    BufferedReader buf;
    StringTokenizer tok;

    public InputReader() {
        buf = new BufferedReader(new InputStreamReader(System.in));
//        try {
//            Path currentRelativePath = Paths.get("");
//            String s = currentRelativePath.toAbsolutePath().toString();
//            String curDir = System.getProperty("user.dir");
//            System.out.println("current dir: " + s);
//            buf = new BufferedReader(new FileReader("/Users/wangdong/Dropbox/LC_Java/src/test/resources/testA.txt"));
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//        }
    }

    public boolean hasNext() {
        while (tok == null || !tok.hasMoreElements()) {
            try {
                tok = new StringTokenizer(buf.readLine());
            } catch (Exception e) {
                return false;
            }
        }
        return true;
    }

    public String next() {
        if (hasNext()) return tok.nextToken();
        return null;
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }

    public long nextLong() {
        return Long.parseLong(next());
    }

    public  Double nextDouble() {
        return Double.parseDouble(next());
    }

    public BigInteger nextBigInteger() {
        return new BigInteger(next());
    }

    public BigDecimal nextBigDecimal() {
        return new BigDecimal(next());
    }
}


public class Main {
  public static void main(String[] args) {
        InputReader in = new InputReader();
        PrintWriter out = new PrintWriter(System.out);
        int n = in.nextInt();
       	out.println(2 * Math.pi * n);
        out.close();
    }
  
}


Compiler output:
Main.java:68: error: cannot find symbol
       	out.println(2 * Math.pi * n);
       	                    ^
  symbol:   variable pi
  location: class Math
1 error
Language: C

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

int main() {
  int R;
  
  cout<<R*2*3.14<<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++

/*
    @uthor: Amit Kumar
    user: CodeChef: dr_virus_ ; Codeforces,Hackerearth,Hakerrank: dr_virus;
*/
#include <bits/stdc++.h>
using namespace std;
//#include <boost/multiprecision/cpp_int.hpp>
//namespace mp = boost::multiprecision;
//#define ln mp::cpp_int;
#define ll long long
#define ld double
#define pp pair<ll,ll>
#define endl "\n"
#define nfrep(a) for(size_t i=0;i<a;i++)
#define fnrep(a,b) for(size_t i=a;i<=b;i++)
#define nbrep(a) for(size_t i=a;i>=0;i--)
#define bnrep(a,b) for(size_t i=a;i>=b;i--)

const ll mod = 1e9+7;
const ll inf = 1e18;


int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    
 /* #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    #endif */

    ll t;
    cin>>t;
    cout<<fixed<<setpercision(2)<<2*3.14*t;
    //cerr<<"Time Elapsed: "<<clock()/(double)CLOCKS_PER_SEC<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int32_t main()':
a.cc:35:18: error: 'setpercision' was not declared in this scope
   35 |     cout<<fixed<<setpercision(2)<<2*3.14*t;
      |                  ^~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
 
	 
int main() {
  	int N,K;
  	cin >> N >>K;
	int answer;
  	answer = ((N+1)*(N*N+2N+6)-(K-1)*(-2*K*K+(4+3*N)*K+6));
  	int a;
  	a = answer / 6;
  	
  	cout << a%(pow(10,9)+7) << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:30: error: unable to find numeric literal operator 'operator""N'
   10 |         answer = ((N+1)*(N*N+2N+6)-(K-1)*(-2*K*K+(4+3*N)*K+6));
      |                              ^~
a.cc:14:18: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   14 |         cout << a%(pow(10,9)+7) << endl;
      |                 ~^~~~~~~~~~~~~~
      |                 |           |
      |                 int         __gnu_cxx::__promote<double>::__type {aka double}
Language: C

import sys
input = sys.stdin.readline

r = int(input())

print(2*r*3.1415926535)

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

#include <stdio.h>

int main(){
int r,circumference;
scanf("%d,&r);
circumference = 2 * (22/7) * r ;
printf("%d",circumference);
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:7: warning: missing terminating " character
    5 | scanf("%d,&r);
      |       ^
main.c:5:7: error: missing terminating " character
    5 | scanf("%d,&r);
      |       ^~~~~~~~
main.c:6:31: error: expected ')' before ';' token
    6 | circumference = 2 * (22/7) * r ;
      |                               ^~
      |                               )
main.c:5:6: note: to match this '('
    5 | scanf("%d,&r);
      |      ^
main.c:6:15: error: passing argument 1 of 'scanf' makes pointer from integer without a cast [-Wint-conversion]
    6 | circumference = 2 * (22/7) * r ;
      | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
      |               |
      |               int
In file included from main.c:1:
/usr/include/stdio.h:428:42: note: expected 'const char *' but argument is of type 'int'
  428 | extern int scanf (const char *__restrict __format, ...) __wur;
      |                   ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
main.c:8:10: error: expected ';' before '}' token
    8 | return 0;
      |          ^
      |          ;
    9 | }
      | ~
Language: C

N=int(input())
import math
print('{:.8f}'.format(math.pi*2*N))

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())
      |   ^~~
main.c:3:7: warning: multi-character literal with 6 characters exceeds 'int' size of 4 bytes
    3 | print('{:.8f}'.format(math.pi*2*N))
      |       ^~~~~~~~
Language: C

#include <iostream>
using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(v) (v).begin(), (v).end()

int main(){
    int r;
    cin >> r;
    cout << 2 * 3.14159265358979 * r << endl;

}

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

# include <iostream>
 
using namespace std;
 
int main () {
  long double a;
  cin>>a;
  long double a,answer=a*2*(3.14159);
  cout<<answer;
  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: redeclaration of 'long double a'
    8 |   long double a,answer=a*2*(3.14159);
      |               ^
a.cc:6:15: note: 'long double a' previously declared here
    6 |   long double a;
      |               ^
Language: C++

#include<iostream>
#include<cmath>
using namespace std;
int n;
struct dian
{
    long long x;
    int id;
}a[2010];
bool cmp(const dian &x,const dian &y)
{
     return x.x>y.x;
}
long long f[2010][2010],ans;
int main()
{
     int i,j;
     cin>>n;
     for(i=1;i<=n;i++) 
     {
         cin>>a[i].x;
         a[i].id=i;
     }
     sort(a+1,a+n+1,cmp);
     for(i=1;i<=n;i++)
      for(j=0;j<=i;j++)
      {
          if(j==0) f[i][j]=f[i-1][j]+a[i].x*abs(a[i].id-(n-i+j+1));
          else if(j==i) f[i][j]=f[i-1][j-1]+a[i].x*abs(a[i].id-j);
          else
          f[i][j]=max(f[i-1][j-1]+a[i].x*abs(a[i].id-j),f[i-1][j]+a[i].x*abs(a[i].id-(n-i+j+1)));
      }
     for(i=0;i<=n;i++) if(f[n][i]>ans) ans=f[n][i];
     //cout<<f[1][1]<<" "<<f[1][0]<<endl;
     cout<<ans;
     cin>>i;
}
          
     
     


Compiler output:
a.cc: In function 'int main()':
a.cc:24:6: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   24 |      sort(a+1,a+n+1,cmp);
      |      ^~~~
      |      sqrt
Language: C

#include<bits/stdc++.h>
using namespace std;
int main(){
  double a;
  cin>>a;
  cout<<a*3.
    14<<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

/*
    @uthor: Amit Kumar
    user: CodeChef: dr_virus_ ; Codeforces,Hackerearth,Hakerrank: dr_virus;
*/
#include <bits/stdc++.h>
using namespace std;
//#include <boost/multiprecision/cpp_int.hpp>
//namespace mp = boost::multiprecision;
//#define ln mp::cpp_int;
#define ll long long
#define ld double
#define pp pair<ll,ll>
#define endl "\n"
#define nfrep(a) for(size_t i=0;i<a;i++)
#define fnrep(a,b) for(size_t i=a;i<=b;i++)
#define nbrep(a) for(size_t i=a;i>=0;i--)
#define bnrep(a,b) for(size_t i=a;i>=b;i--)

const ll mod = 1e9+7;
const ll inf = 1e18;


int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    
 /* #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    #endif */
	
    ll n;
  	cin>>n;
  	cout<<fixed<<setpercison(2)<<2*n*(3.14);
    
    //cerr<<"Time Elapsed: "<<clock()/(double)CLOCKS_PER_SEC<<endl;
    return 0;
}

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

import java.util.Scanner;

public class test1{
public static void main(String[]args){
  final double PI = 3.141592;
  Scanner stdIn = new Scanner(System.in);
  double r = stdIn.nextDouble();//半径

  System.out.println(2 * PI * r );

 }
 }

Compiler output:
Main.java:3: error: class test1 is public, should be declared in a file named test1.java
public class test1{
       ^
1 error
Language: C++

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

int main(){
	long long n,k;
	cin>>n>>k;
	long long ans=0;
	for(int i=k;k<=n+1){
		ans=ans+i*(n-i+1)+1;
	}
	cout<<ans%1000000007;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:27: error: expected ';' before ')' token
    8 |         for(int i=k;k<=n+1){
      |                           ^
      |                           ;
Language: C

#include<bits/stdc++.h>
using namespace std;
#define MOD 1000000007
#define pb push_back
 
int n,a[2005];
 
int32_t main(){
   float r;
   cin>>r;
   cout<<2*3.14*r;
 
}

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

#include<stdio.h>
#define PI 3.141592

int main(void) {

	double R;
	double L;
	scanf_s("%lf", &R);

	L = 2*R * PI;


	printf("%f", L);

	return 0;

}

Compiler output:
main.c: In function 'main':
main.c:8:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    8 |         scanf_s("%lf", &R);
      |         ^~~~~~~
      |         scanf
Language: C++

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

int main(){
	long long n,k;
	cin>>n>>k;
	long long ans=0;
	for(int i=k;k<=n+1){
		ans=ans+i*(N-i+1)+1;
	}
	cout<<ans%1000000007;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:27: error: expected ';' before ')' token
    8 |         for(int i=k;k<=n+1){
      |                           ^
      |                           ;
a.cc:9:28: error: 'N' was not declared in this scope
    9 |                 ans=ans+i*(N-i+1)+1;
      |                            ^
Language: Java

import java.util.Scanner;


public static void main(String[]args){
  final double PI = 3.141592;
  Scanner stdIn = new Scanner(System.in);
  double r = stdIn.nextDouble();//半径

  System.out.println(2 * PI * r );

 }

Compiler output:
Main.java:4: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String[]args){
              ^
  (use --enable-preview to enable unnamed classes)
1 error