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


#include <cstdio>
#include <algorithm>
#include <vector>
#include <string>
#include <iostream>
#include <climits>
#include <cmath>
#include <functional>
#include <map>
#include <queue>
#include <set>
#include <stack>

#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define INF 999999999
#define size_t unsigned long long
#define ll long long
#define rep(i,a) for(int i=0;i<(a);i++)
#define repr(i,a) for(int i=(int)(a)-1;i>=0;i--)
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define FORR(i,a,b) for(int i=(int)(b)-1;i>=a;i--)
#define ALL(a) a.begin(), a.end()
using namespace std;
int si() { int x; scanf("%d", &x); return x; }
long long sl() { long long x; scanf("%lld", &x); return x; }
string ss() { string x; cin >> x; return x; }
void pi(int x) { printf("%d ", x); }
void pl(long long x) { printf("%lld ", x); }
void pd(double x) { printf("%.15f ", x); }
void ps(const string &s) { printf("%s ", s.c_str()); }
void br() { putchar('\n'); }

const ll MOD = 1e9 + 7;

struct mint {
    int n;
    mint(int n_ = 0) : n(n_) {}
};

mint operator+(mint a, mint b) { a.n += b.n; if (a.n >= MOD) a.n -= MOD; return a; }
mint operator-(mint a, mint b) { a.n -= b.n; if (a.n < 0) a.n += MOD; return a; }
mint operator*(mint a, mint b) { return (long long)a.n * b.n % MOD; }
mint &operator+=(mint &a, mint b) { return a = a + b; }
mint &operator-=(mint &a, mint b) { return a = a - b; }
mint &operator*=(mint &a, mint b) { return a = a * b; }

const int N = 3005;

string s;
int n;
double p[N];
double dp[N][N];
bool memo[N][N];

int main () {
  cin >> n;
  double result;
  result = n % 2 ? (n+1) / 2.0 / n : 0.5 
  pd(result);br();
}


Compiler output:
a.cc: In function 'int main()':
a.cc:60:41: error: expected ';' before 'pd'
   60 |   result = n % 2 ? (n+1) / 2.0 / n : 0.5
      |                                         ^
      |                                         ;
   61 |   pd(result);br();
      |   ~~
Language: Java

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int A[] = new int[N];
		string out;
		System.out.println(out);
		sc.close();
	}

}


Compiler output:
Main.java:9: error: cannot find symbol
		string out;
		^
  symbol:   class string
  location: class Main
1 error
Language: C++

#include <iostream>
#include <algorithm>
#include <iomanip>

using namespace std;

int main() {
    int n;
    cin >> n;
    double x = 0;
    for (int i = 1; i <= n; i++) {
        if (i % 2 == 1)x++;
    }

    cout << << fixed << setprecision(10) << x / n << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:13: error: expected primary-expression before '<<' token
   15 |     cout << << fixed << setprecision(10) << x / n << endl;
      |             ^~
Language: Java

import java.util.*;

public class Main{
  public static void main{
    Scanner sc = new Scanner(System.in);
    double N = sc.nextDouble();
    
    System.out.println(N % 2 == 0 ? (N/2)/N:((N+1)/2)/N);
  }
}

Compiler output:
Main.java:4: error: '(' expected
  public static void main{
                         ^
1 error
Language: C++

#include<iostream>
using namespace std;
int main(){
  cin>>N>>K;
  int N,K,H[100000],x=0;
  for(int i=0;i<N;i++){
    int H[i];
    if(H[i]<=K)
    x++;
  }
  cout<<x<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:8: error: 'N' was not declared in this scope
    4 |   cin>>N>>K;
      |        ^
a.cc:4:11: error: 'K' was not declared in this scope
    4 |   cin>>N>>K;
      |           ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
int n;cin>>n;float x=(n/2+1)/n;
  if(n%2==0);cout<<"0.5000000000";
  else cout<<fixed<<setprecision(10)<<x;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'else' without a previous 'if'
    7 |   else cout<<fixed<<setprecision(10)<<x;
      |   ^~~~
a.cc:7:21: error: 'setprecision' was not declared in this scope
    7 |   else cout<<fixed<<setprecision(10)<<x;
      |                     ^~~~~~~~~~~~
a.cc:2:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    1 | #include<iostream>
  +++ |+#include <iomanip>
    2 | using namespace std;
Language: C++

#include<iostream>
using namespace std;
int main()
{
int n;cin>>n;
  if(n%2==0);cout<<(float)(1/2);
  else cout<<(float)(n/2+1)/n;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'else' without a previous 'if'
    7 |   else cout<<(float)(n/2+1)/n;
      |   ^~~~
Language: C

#include<stdio.h>
int main(void){
  int n;
  scanf("%d",&n);
  for(n=1;n<=100;n++){
  if(n%2==0){
    printf("偶数");
  }else{
    printf("奇数");
  }
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:12:1: error: expected declaration or statement at end of input
   12 | }
      | ^
Language: C

#include<stdio.h>
int main(void){
  int n;
  scanf("%d",&n);
  for(n=1;n<=100;n++){
  	if(n%2==0)
    printf("偶数");
  }else{
    printf("奇数");
  }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:4: error: 'else' without a previous 'if'
    8 |   }else{
      |    ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  double n;
  cin>>n;
  
  double ans=0.5;
  if(n%2.0==1.0)
  {
    ans+=ans/n;
  }
  cout<<ans<<endl;
  
 return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: invalid operands of types 'double' and 'double' to binary 'operator%'
    9 |   if(n%2.0==1.0)
      |      ~^~~~
      |      | |
      |      | double
      |      double
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  double n;
  cin>>n;
  
  double ans=0.5;
  if(n%2==1)
  {
    ans+=ans/n;
  }
  cout<<ans<<endl;
  
 return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    9 |   if(n%2==1)
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  double n;
  cin>>n;
  
  double ans=0.5;
  if(n%2==0)
  {
    ans+=ans/n;
  }
  cout<<ans<<endl;
  
 return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    9 |   if(n%2==0)
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  double n;
  cin>>n;
  
  double ans=0.5;
  if(n&1)
  {
    ans+=ans/n;
  }
  cout<<ans<<endl;
  
 return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: invalid operands of types 'double' and 'int' to binary 'operator&'
    9 |   if(n&1)
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C

#include<stdio.h>
int main()
{
  int n;

  scanf("%d"&n);
  
  if(n%2==0){
    printf("%d",(n/2)/n);
  }
  
  else{
    printf("%d",((n/2)+1)/n);
  }

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:13: error: invalid operands to binary & (have 'char *' and 'int')
    6 |   scanf("%d"&n);
      |         ~~~~^
      |         |
      |         char *
Language: C++

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

int main(){
  int n;
  cin >> n;
  
  if(n%2==0){
    cout << 0.5000000000 <<endl;
  }else{
    cout << (2n-1)/n << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:14: error: unable to find numeric literal operator 'operator""n'
   11 |     cout << (2n-1)/n << endl;
      |              ^~
Language: C++

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

int main(){
  double n;
  cin >> n;
  
  if(n%2==0){
    cout << 0.5000000000 <<endl;
  }else{
    cout << n+1/(2*n) << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    8 |   if(n%2==0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

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

int main(){
  double n;
  cin >> n;
  
  if(n%2=0){
    cout << 0.5000000000 <<endl;
  }else{
    cout << n+1/(2*n) << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    8 |   if(n%2=0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

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

int main(){
  double n;
  cin >> n;
  
  if(n=1){
    cout << 1.0000000000 <<endl;
  }else{
  if(n%2=0){
    cout << 0.5000000000 <<endl;
  }else{
    cout << n-1/(2*n) << endl;
  }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   11 |   if(n%2=0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

int main()
{
    int n;
    double ans;
    if (n % 2 == 0) {
        ans = (n / 2) / (double)n;
    } else {
        ans = (n / 2 + 1) / (double)n;
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'cout' was not declared in this scope
   10 |     cout << ans << endl;
      |     ^~~~
a.cc:10:20: error: 'endl' was not declared in this scope
   10 |     cout << ans << endl;
      |                    ^~~~
Language: C++

// by ul {{{
#include <bits/stdc++.h>
#include <unistd.h>
#define SZ(x) ((int)(x).size())
#define ALL(c) begin(c),end(c)
#define REP(i,n) for ( int i=0; i<(int)(n); i++ )
#define REP1(i,a,b) for ( int i=(int)(a); i<=(int)(b); i++ )
#define FOR(it,c) for ( auto it=(c).begin(); it!=(c).end(); it++ )
#define MP make_pair
#define PB push_back
using namespace std;
typedef pair<int,int> PII;
typedef vector<int> VI;
typedef long long LL;

void RI() {}

template<typename... T>
void RI( int& head, T&... tail ) {
    scanf("%d",&head);
    RI(tail...);
}

template<typename T>
void _dump( const char* s, T&& head ) { cerr<<s<<"="<<head<<endl; }

template<typename T, typename... Args>
void _dump( const char* s, T&& head, Args&&... tail ) {
    int c=0;
    while ( *s!=',' || c!=0 ) {
        if ( *s=='(' || *s=='[' || *s=='{' ) c++;
        if ( *s==')' || *s==']' || *s=='}' ) c--;
        cerr<<*s++;
    }
    cerr<<"="<<head<<", ";
    _dump(s+1,tail...);
}

#define dump(...) _dump(#__VA_ARGS__, __VA_ARGS__);

template<typename Iter>
ostream& _out( ostream &s, Iter b, Iter e ) {
    s<<"[";
    for ( auto it=b; it!=e; it++ ) s<<(it==b?"":" ")<<*it;
    s<<"]";
    return s;
}

template<typename A, typename B>
ostream& operator <<( ostream &s, const pair<A,B> &p ) { return s<<"("<<p.first<<","<<p.second<<")"; }
template<typename T>
ostream& operator <<( ostream &s, const vector<T> &c ) { return _out(s,ALL(c)); }
template<typename T>
ostream& operator <<( ostream &s, const set<T> &c ) { return _out(s,ALL(c)); }
template<typename A, typename B>
ostream& operator <<( ostream &s, const map<A,B> &c ) { return _out(s,ALL(c)); }
// }}}

int N;
void input() {
    RI(N)
}

void solve() {
    cout << (double)((N/2) + (N%2))/N << endl;
}

int main( int argc, char *argv[] ) {
    input();
    solve();
    return 0;
}


Compiler output:
a.cc: In function 'void input()':
a.cc:61:10: error: expected ';' before '}' token
   61 |     RI(N)
      |          ^
      |          ;
   62 | }
      | ~
Language: C++

// by ul {{{
#include <bits/stdc++.h>
#include <unistd.h>
#define SZ(x) ((int)(x).size())
#define ALL(c) begin(c),end(c)
#define REP(i,n) for ( int i=0; i<(int)(n); i++ )
#define REP1(i,a,b) for ( int i=(int)(a); i<=(int)(b); i++ )
#define FOR(it,c) for ( auto it=(c).begin(); it!=(c).end(); it++ )
#define MP make_pair
#define PB push_back
using namespace std;
typedef pair<int,int> PII;
typedef vector<int> VI;
typedef long long LL;

void RI() {}

template<typename... T>
void RI( int& head, T&... tail ) {
    scanf("%d",&head);
    RI(tail...);
}

template<typename T>
void _dump( const char* s, T&& head ) { cerr<<s<<"="<<head<<endl; }

template<typename T, typename... Args>
void _dump( const char* s, T&& head, Args&&... tail ) {
    int c=0;
    while ( *s!=',' || c!=0 ) {
        if ( *s=='(' || *s=='[' || *s=='{' ) c++;
        if ( *s==')' || *s==']' || *s=='}' ) c--;
        cerr<<*s++;
    }
    cerr<<"="<<head<<", ";
    _dump(s+1,tail...);
}

#define dump(...) _dump(#__VA_ARGS__, __VA_ARGS__);

template<typename Iter>
ostream& _out( ostream &s, Iter b, Iter e ) {
    s<<"[";
    for ( auto it=b; it!=e; it++ ) s<<(it==b?"":" ")<<*it;
    s<<"]";
    return s;
}

template<typename A, typename B>
ostream& operator <<( ostream &s, const pair<A,B> &p ) { return s<<"("<<p.first<<","<<p.second<<")"; }
template<typename T>
ostream& operator <<( ostream &s, const vector<T> &c ) { return _out(s,ALL(c)); }
template<typename T>
ostream& operator <<( ostream &s, const set<T> &c ) { return _out(s,ALL(c)); }
template<typename A, typename B>
ostream& operator <<( ostream &s, const map<A,B> &c ) { return _out(s,ALL(c)); }
// }}}

int N;
void input() {
    RI(N)
}

void solve() {
    cout << (double)((N/2) + (N%2))/N << endl;
}

int main( int argc, char *argv[] ) {
    input();
    return 0;
}


Compiler output:
a.cc: In function 'void input()':
a.cc:61:10: error: expected ';' before '}' token
   61 |     RI(N)
      |          ^
      |          ;
   62 | }
      | ~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<n ; ++i)
#define REP(i,a,b) for(int i=a; i<b; ++i)
typedef long long ll;
//プロトタイプ宣言
int gcd(int , int);


int main(){
    int n;
    cin >> n;
    cout << (n % 2 == 1) ? (double)((n/2) + 1) / n : (double)(n/2) / n << endl;
}








































//以下、ライブラリ
//ユークリッドの互除法

int gcd(int a, int b) {
  return b ? gcd(b, a%b) : a;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:13:72: error: invalid operands of types 'double' and '<unresolved overloaded function type>' to binary 'operator<<'
   13 |     cout << (n % 2 == 1) ? (double)((n/2) + 1) / n : (double)(n/2) / n << endl;
      |                                                      ~~~~~~~~~~~~~~~~~~^~~~~~~
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    final int N=sc.nextInt();
    int[] array=new int[N];
    int counter=0;
    for(int i=0;i<N;i++){
      array[i]=i;
    }
    for(int i:array){
      if(i%2==0){
        counter++;
      }
    }
    double answer=counter/N;
    System.out.println(answer);
  }
}
import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    final int N=sc.nextInt();
    int[] array=new int[N];
    int counter=0;
    for(int i=0;i<N;i++){
      array[i]=i;
    }
    for(int i:array){
      if(i%2!=0){
        counter++;
      }
    }
    double answer=counter/N;
    System.out.println(answer);
  }
}


Compiler output:
Main.java:21: error: class, interface, enum, or record expected
import java.util.*;
^
1 error
Language: C++

#include <iostream>

int main()
{
    // input
    int N;
    std::cin >> N;

    // solve
    int cnt = 0;
    for (int i = 1; i <= N; i++)
    {
        if (i % 2 == 1)
        {
            cnt++;
        }
    }

    // answer
    double ans = double(cnt) / double(N);
    std::cout << ans << std::endl;
}1


Compiler output:
a.cc:22:2: error: expected unqualified-id before numeric constant
   22 | }1
      |  ^
Language: Java

import java.util.Scanner;
public class Main {
	public static void main(String args[]){//double 处理果盘
		Scanner in = new Scanner(System.in);
		int n = in.nextInt(),j;
		if (n % 2 == 0){
			j = n/2;
		}else{
			j = 1 + (n -1 )/2;
		}
		float x = (float)j/n;
		System.out.println(x);
		
	

Compiler output:
Main.java:12: error: reached end of file while parsing
		System.out.println(x);
		                      ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  double a;
  cin >> a;
  int A=static_cast<int>(a);
  cout << (a%2==0?1.0/2.0:((a+1)/2)/a) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:13: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   cout << (a%2==0?1.0/2.0:((a+1)/2)/a) << endl;
      |            ~^~
      |            | |
      |            | int
      |            double
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a;
  cin >> a;
  double A=static_cast<double>(a);
  cout << setprecision(20) << (a%2?(A/2.0)/A:(((A+1.0)/2.0)/A) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:64: error: invalid operands of types 'double' and '<unresolved overloaded function type>' to binary 'operator<<'
    7 |   cout << setprecision(20) << (a%2?(A/2.0)/A:(((A+1.0)/2.0)/A) << endl;
      |                                              ~~~~~~~~~~~~~~~~~~^~~~~~~
a.cc:7:71: error: expected ')' before ';' token
    7 |   cout << setprecision(20) << (a%2?(A/2.0)/A:(((A+1.0)/2.0)/A) << endl;
      |                               ~                                       ^
      |                                                                       )
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a;
  cin >> a;
  double A=static_cast<double>(a);
  cout << setprecision(20) << (a%2?(A/2)/A:(((A+1)/2)/A) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:58: error: invalid operands of types 'double' and '<unresolved overloaded function type>' to binary 'operator<<'
    7 |   cout << setprecision(20) << (a%2?(A/2)/A:(((A+1)/2)/A) << endl;
      |                                            ~~~~~~~~~~~~~~^~~~~~~
a.cc:7:65: error: expected ')' before ';' token
    7 |   cout << setprecision(20) << (a%2?(A/2)/A:(((A+1)/2)/A) << endl;
      |                               ~                                 ^
      |                                                                 )
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a;
  cin >> a;
  A=static_cast<double>(a);
  cout << setprecision(20) << (a%2?(A/2)/A:(((A+1)/2)/A) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'A' was not declared in this scope
    6 |   A=static_cast<double>(a);
      |   ^
a.cc:7:65: error: expected ')' before ';' token
    7 |   cout << setprecision(20) << (a%2?(A/2)/A:(((A+1)/2)/A) << endl;
      |                               ~                                 ^
      |                                                                 )
Language: C

#include <stdio.h>
int main ( )
{
       int n,i,odd=0;
       float p;
        scanf ("%d",&n);
        for (i=1; i<=n; i++)
        {
                if (i%2!=0)
                         odd++;
         }
         p=odd/(float)n;
         printf ("%f\n",p);
         return 0;
}
C

Compiler output:
main.c:16:1: error: expected '=', ',', ';', 'asm' or '__attribute__' at end of input
   16 | C
      | ^
Language: C

#include <iostream>
#include<cstdio>
using namespace std;
int main () {
	int a;
	cin>>a;
	double b;
	b=1-(double)(a/2)/(double)a;
	cout<< b << endl;
} 

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

#include<iostream>
#include<cstdio>

using namespace std;

int main() {
int n ;
cin >> n ;
float a=0;

for(int i=1;i<=n;i++)
if(i%2!=0)a++;

a=a/n;

printf("%1.10f\n",a);

return 0;
}


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

#include<iostream>
using namespace std;
int main () {
  double N;
  cin >> N;
  double k;
  if (N % 2) {
    k = N / 2 + 1;
  }
  else k = N / 2;
  cout << N / k << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if (N % 2) {
      |       ~ ^ ~
      |       |   |
      |       |   int
      |       double
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n ; 
	cin >> n ; 
	if ( n % 2 == 0 ){
		cout << fixed << setprecision(12) << 0.5 << endl;}
	else{
		double ans = (n / 2 + 1) / (double) n ; 
		cout << fixed << setprecision(12) << ans << endl;
	}
	return 0 ; 

Compiler output:
a.cc: In function 'int main()':
a.cc:12:19: error: expected '}' at end of input
   12 |         return 0 ;
      |                   ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include<cstdio>
int main() {double n; scanf("%lf",&n); if(n % 2) printf("%lf",((n/2)+1)/n); else printf("%lf",(n/2)/n);}  

Compiler output:
a.cc: In function 'int main()':
a.cc:2:45: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    2 | int main() {double n; scanf("%lf",&n); if(n % 2) printf("%lf",((n/2)+1)/n); else printf("%lf",(n/2)/n);}
      |                                           ~ ^ ~
      |                                           |   |
      |                                           |   int
      |                                           double
Language: C++

#include <iostream>

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

    double M = N;

    std::cout << setprecision(10) << (N % 2 == 0 ? 0.5 : 1.0 - (M - 1.0) / 2.0 / M) << std::endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: 'setprecision' was not declared in this scope
   10 |     std::cout << setprecision(10) << (N % 2 == 0 ? 0.5 : 1.0 - (M - 1.0) / 2.0 / M) << std::endl;
      |                  ^~~~~~~~~~~~
Language: C++

#include <iostream>

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

    double M = N;

    std::cout << setprecision(10) << (N % 2 == 0 ? 0.5 : 1.0 - (M - 1.0) / 2.0 / M) << std::endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: 'setprecision' was not declared in this scope
   10 |     std::cout << setprecision(10) << (N % 2 == 0 ? 0.5 : 1.0 - (M - 1.0) / 2.0 / M) << std::endl;
      |                  ^~~~~~~~~~~~
Language: C++

#include <iostream>

int main()
{
  double N;
  std::cin >> N;
 
  std::cout << (N % 2 == 0 ? 0.5 : 1.0 - (N - 1.0) / 2.0 / N) << std::endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    8 |   std::cout << (N % 2 == 0 ? 0.5 : 1.0 - (N - 1.0) / 2.0 / N) << std::endl;
      |                 ~ ^ ~
      |                 |   |
      |                 |   int
      |                 double
Language: C

#include <stdio.h>

int main(){
	int i,j,k;

	scanf("%d",&k);

	int  count=0;
	for(i=1; i<=k; i++){
		if(i%2==0){
			count++;
		}
	}
	
	int odd;
	odd=k-count;
	j=double odd/k;

	printf("%f",j);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:17:11: error: expected expression before 'double'
   17 |         j=double odd/k;
      |           ^~~~~~
Language: C

#include <stdio.h>

int main(){
	int i,j,k;

	scanf("%lf",&k);

	int  count=0;
	for(i=1; i<=k; i++){
		if(i%f2==0){
			count++;
		}
	}
	
	int odd;
	odd=k-count;

	printf("%f",double odd/k);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:22: error: 'f2' undeclared (first use in this function)
   10 |                 if(i%f2==0){
      |                      ^~
main.c:10:22: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:21: error: expected expression before 'double'
   18 |         printf("%f",double odd/k);
      |                     ^~~~~~
Language: C

#include <stdio.h>

int main(){
	double i,j,k;

	scanf("%lf",&k);

	double count=0;
	for(i=1; i<=k; i++){
		if(i%f2==0){
			count++;
		}
	}
	
	double odd;
	odd=k-count;

	printf("%f",odd/k);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:22: error: 'f2' undeclared (first use in this function)
   10 |                 if(i%f2==0){
      |                      ^~
main.c:10:22: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(){
	double i,j,k;

	scanf("%lf",&k);

	double count=0;
	for(i=1; i<=k; i++){
		if(i%2==0){
			count++;
		}
	}
	
	double odd;
	odd=k-count;

	printf("%f",odd/k);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:21: error: invalid operands to binary % (have 'double' and 'int')
   10 |                 if(i%2==0){
      |                     ^
Language: C

#include <stdio.h>

int main(){
	double i,j,k;

	scanf("%d",&k);

	double count=0;
	for(i=1; i<=k; i++){
		if(i%2==0){
			count++;
		}
	}
	
	double odd;
	odd=k-count;

	printf("%d",odd/k);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:21: error: invalid operands to binary % (have 'double' and 'int')
   10 |                 if(i%2==0){
      |                     ^
Language: Java

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner s = new Scanner(System.in);
		int n = s.nextInt();
		String str = s.nextLine();
//		String str = "2 3 1";
		int[] arr = new int[n+1]; 
		arr[0] = 0;
		String sss[] = str.split("\\s");
		for(int i=1;i<=n;i++) {

			arr[i] = Integer.parseInt(sss[i-1]);
			
		}
		
		int[] a = new int[n+1];
		a[0] = 0;
		for(int i=1;i<=n;i++) {
			a[(arr[i])] = i;
		}
		for(int i=1;i<=n;i++) {
			System.out.print(a[i]+" ");
		}
	}

Compiler output:
Main.java:1: 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
Language: Java

import java.util.Scanner;

public class CGotoSchool {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner s = new Scanner(System.in);
		int n = s.nextInt();
		String str = s.nextLine();
//		String str = "2 3 1";
		int[] arr = new int[n+1]; 
		arr[0] = 0;
		String sss[] = str.split("\\s");
		for(int i=1;i<=n;i++) {

			arr[i] = Integer.parseInt(sss[i-1]);
			
		}
		
		int[] a = new int[n+1];
		a[0] = 0;
		for(int i=1;i<=n;i++) {
			a[(arr[i])] = i;
		}
		for(int i=1;i<=n;i++) {
			System.out.print(a[i]+" ");
		}
	}

}

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

#include<stdio.h>
void main()
{
int N,i,count=0;
double p;
scanf("%d",&N);
for(i=1;i<=N;i++)
{
if(i%2!=0)
{
count++;
}
}
p=count/N;
printf("%ld",p);

Compiler output:
main.c: In function 'main':
main.c:15:1: error: expected declaration or statement at end of input
   15 | printf("%ld",p);
      | ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for(int i = 0; i < n; i++)
int main(){ 
    double n;
    cin>>n;
    if(n%2.0==0){
        cout<<0.5;
    }else{
    cout<<((n+1)/2)/n;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'double' to binary 'operator%'
    7 |     if(n%2.0==0){
      |        ~^~~~
      |        | |
      |        | double
      |        double
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for(int i = 0; i < n; i++)
int main(){ 
    double n;
    cin>>n;
    if(n%2==0){
        cout<<0.5;
    }else{
    cout<<((n+1)/2)/n;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |     if(n%2==0){
      |        ~^~
      |        | |
      |        | int
      |        double
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for(int i = 0; i < n; i++)
int main(){ 
    double n;
    cin>>n;
    if(n%2==0){
        cout<<0.50000000;
    }else{
    cout<<((n+1)/2)/n;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |     if(n%2==0){
      |        ~^~
      |        | |
      |        | int
      |        double
Language: C

#include <stdio.h>
int main()
{int n;
float w,s;
scanf("%d",&n);
if(n%2==0)
{w=(n/2)/n;
printf("%10f",w);}
else 
{s=float(((n/2)+1)/n};
printf("%10f",s);}
return 0;
}


Compiler output:
main.c: In function 'main':
main.c:10:4: error: expected expression before 'float'
   10 | {s=float(((n/2)+1)/n};
      |    ^~~~~
Language: C++

#include<stdio.h>
int n, i, j=0;
double p;
cin>>n;
for(i=1; i<=n; i++){
if(i%2==0)
j++;
}

p=n/j;

cout<<p;

Compiler output:
a.cc:4:1: error: 'cin' does not name a type
    4 | cin>>n;
      | ^~~
a.cc:5:1: error: expected unqualified-id before 'for'
    5 | for(i=1; i<=n; i++){
      | ^~~
a.cc:5:10: error: 'i' does not name a type
    5 | for(i=1; i<=n; i++){
      |          ^
a.cc:5:16: error: 'i' does not name a type
    5 | for(i=1; i<=n; i++){
      |                ^
a.cc:10:1: error: 'p' does not name a type
   10 | p=n/j;
      | ^
a.cc:12:1: error: 'cout' does not name a type
   12 | cout<<p;
      | ^~~~
Language: C

#include <stdio.h>
int main()
{int n;
float w,s;
scanf("%d",&n);
if(n%2==0)
w=(n/2)/n;
printf("%f",w);
else 
w=(n/2+1)/n;
printf("%f",s);
return 0;
}






Compiler output:
main.c: In function 'main':
main.c:9:1: error: 'else' without a previous 'if'
    9 | else
      | ^~~~
Language: C

#include<stdio.h>
void main()
{
int N,i=1,count=0;
scanf("%d",&N);

while(i!=N)
{
if(i%2==1)
     count++;
}

printf("%f",count/N);


Compiler output:
main.c: In function 'main':
main.c:13:1: error: expected declaration or statement at end of input
   13 | printf("%f",count/N);
      | ^~~~~~
Language: C

include<stdio.h>
main()
{
int n;
double k;
scanf("%d",&n);
if(n%2==0)
k=1/2;
else
k=(n-1)/(2*);

pritnf("%d",k);
}


Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C

main()
{
    int N;
     double k;
    scanf("%d",&N);
    if(N%2==0)
    k=1/2;
    else
    k=(N-1)/(2*N);
    printf"%d",k);
}


Compiler output:
main.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main()
      | ^~~~
main.c: In function 'main':
main.c:5:5: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |     scanf("%d",&N);
      |     ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | main()
main.c:5:5: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |     scanf("%d",&N);
      |     ^~~~~
main.c:5:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:10:5: error: 'printf' undeclared (first use in this function)
   10 |     printf"%d",k);
      |     ^~~~~~
main.c:10:5: note: 'printf' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:10:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:10:11: error: expected ';' before string constant
   10 |     printf"%d",k);
      |           ^~~~
      |           ;
main.c:10:17: error: expected statement before ')' token
   10 |     printf"%d",k);
      |                 ^
Language: C

#include<stdio.h>
int main(){
int N;
scanf("%d",&a);
if((N>=1)&&(N<=100)){
if(N%2==0){
printf("0.5000000000");
}
else{
printf("1.10d",((N+1)/(2*N));
}
}
else{
printf("Error");
}
}

Compiler output:
main.c: In function 'main':
main.c:4:13: error: 'a' undeclared (first use in this function)
    4 | scanf("%d",&a);
      |             ^
main.c:4:13: note: each undeclared identifier is reported only once for each function it appears in
main.c:10:29: error: expected ')' before ';' token
   10 | printf("1.10d",((N+1)/(2*N));
      |       ~                     ^
      |                             )
main.c:10:30: error: expected ';' before '}' token
   10 | printf("1.10d",((N+1)/(2*N));
      |                              ^
      |                              ;
   11 | }
      | ~
Language: C++

#include<iostream>
#include<stdio.h>
using namespace std;
int main()
{
    int i;
    cin>>i;
    if(i==1)
       cout<<"1.0000000000";
    else 
    {
        if((i%2)==0)
        {
            cout<<"0.5000000000";
        }
        else
        {
            doublele x=((i/2)+1);
            cout<<x/double(i);
        }
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:13: error: 'doublele' was not declared in this scope; did you mean 'double'?
   18 |             doublele x=((i/2)+1);
      |             ^~~~~~~~
      |             double
a.cc:19:19: error: 'x' was not declared in this scope
   19 |             cout<<x/double(i);
      |                   ^
Language: Java

import java.util.*;
public class A
{ 
public static void main(String args[])throws Exception
{ 
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
if(n==1)
{ 
float p=1.0;
System.out.println(p);
}
else
{
int k=0;
for(int i=1;i<n;i+=2)
k++;
int p=(k*1.0)/n;
System.out.println(p);
}
}
}

Compiler output:
Main.java:2: error: class A is public, should be declared in a file named A.java
public class A
       ^
Main.java:10: error: incompatible types: possible lossy conversion from double to float
float p=1.0;
        ^
Main.java:18: error: incompatible types: possible lossy conversion from double to int
int p=(k*1.0)/n;
             ^
3 errors
Language: Java

import java.util.*;
public class A
{ 
public static void main(String args[])throws Exception
{ 
Scanner sc=new Scanner(System.in));
int n=sc.nextInt();
if(n==1)
{ 
float p=1.0;
System.out.println(p);
}
else
{
int k=0;
for(int i=1;i<n;i+=2)
k++;
int p=(k*1.0)/n;
System.out.println(p);
}
}
}

Compiler output:
Main.java:6: error: ';' expected
Scanner sc=new Scanner(System.in));
                                 ^
1 error
Language: C++

#include<iostream.h>
using namespace.std
 int main()
{
  int n,count=0;
  float p;
  cin>>n;
  for(int i=1;i<=n;i++)
  {
   if(i%2!=0)
      count++;
  }
  p=count/n;
  cout<<p;
  return 0;
}


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

#include<iostream.h>
void main()
{int n,i;

float f,cnt;
cnt=0;
cin>>n;
if(n==0)
{cout<<cnt;
}
else
{for(i=1;i<=n;++i)
 {if(i%2==1)
  cnt++;
}
f=cnt/n;
cout<<f;
}
}

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

#include <stdio.h>

int main()
{
    double float i;
    cin>>i;
    if(i==1)
       cout<<"1.0000000000";
    else 
    {
        if(i%2==0)
        {
            cout<<"0.5000000000";
        }
        else
        {
            cout<<"0.6000000000";
        }
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: two or more data types in declaration of 'i'
    5 |     double float i;
      |     ^~~~~~
a.cc:6:5: error: 'cin' was not declared in this scope
    6 |     cin>>i;
      |     ^~~
a.cc:6:10: error: 'i' was not declared in this scope
    6 |     cin>>i;
      |          ^
a.cc:8:8: error: 'cout' was not declared in this scope
    8 |        cout<<"1.0000000000";
      |        ^~~~
a.cc:13:13: error: 'cout' was not declared in this scope
   13 |             cout<<"0.5000000000";
      |             ^~~~
a.cc:17:13: error: 'cout' was not declared in this scope
   17 |             cout<<"0.6000000000";
      |             ^~~~
Language: C++

int main()
{int n;
 double a,m;
	cin>>n;
	if(n%2==0)
{	
	cout<<setiosflags(ios::fixed)<<setprecision(10);
	cout<<"0.5000000000"<<endl;
	}
	else
{
	m=(n/2)+1;
	cout<<setiosflags(ios::fixed)<<setprecision(10);
	a=m*1.0/n;
	cout<<a<<endl;
	}
	return 0;
 } 

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: 'cin' was not declared in this scope
    4 |         cin>>n;
      |         ^~~
a.cc:7:9: error: 'cout' was not declared in this scope
    7 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |         ^~~~
a.cc:7:27: error: 'ios' has not been declared
    7 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |                           ^~~
a.cc:7:15: error: 'setiosflags' was not declared in this scope
    7 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |               ^~~~~~~~~~~
a.cc:7:40: error: 'setprecision' was not declared in this scope
    7 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |                                        ^~~~~~~~~~~~
a.cc:8:31: error: 'endl' was not declared in this scope
    8 |         cout<<"0.5000000000"<<endl;
      |                               ^~~~
a.cc:13:9: error: 'cout' was not declared in this scope
   13 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |         ^~~~
a.cc:13:27: error: 'ios' has not been declared
   13 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |                           ^~~
a.cc:13:15: error: 'setiosflags' was not declared in this scope
   13 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |               ^~~~~~~~~~~
a.cc:13:40: error: 'setprecision' was not declared in this scope
   13 |         cout<<setiosflags(ios::fixed)<<setprecision(10);
      |                                        ^~~~~~~~~~~~
a.cc:15:18: error: 'endl' was not declared in this scope
   15 |         cout<<a<<endl;
      |                  ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
  int N;
  cin >> N;
  
  double x;
  if(N == 1) {
    x = 1.0;
  }
  else if(N%2 == 0) {
    x = 0.5;
  }
  else if(N%2 == 1) {
    int A -= N / 2;
    x = A / N;
  }
  
  cout << x << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:11: error: expected initializer before '-=' token
   16 |     int A -= N / 2;
      |           ^~
a.cc:17:9: error: 'A' was not declared in this scope
   17 |     x = A / N;
      |         ^
Language: C++

#include <iostram>
using namespace std;

int main() {
  int N;
  cin >> N;
  
  double x;
  if(N == 1) {
    x = 1.0;
  }
  else if(N%2 == 0) {
    x = 0.5;
  }
  else if(N%2 == 1) {
    int A = N / 2;
    x = A / (A + 1);
  }
  
  cout << x << endl;
}

Compiler output:
a.cc:1:10: fatal error: iostram: No such file or directory
    1 | #include <iostram>
      |          ^~~~~~~~~
compilation terminated.
Language: Java

#include <bits/stdc++.h>

using namespace std;

int main() {
    int n; cin>>n;
    
    cout << ((n%2==0)?(n/2.0)/n:((n-1)/2.0+1)/n) << endl;

    return 0;
}

Compiler output:
Main.java:1: error: illegal character: '#'
#include <bits/stdc++.h>
^
Main.java:1: error: class, interface, enum, or record expected
#include <bits/stdc++.h>
         ^
Main.java:6: error: not a statement
    int n; cin>>n;
              ^
Main.java:8: error: not a statement
    cout << ((n%2==0)?(n/2.0)/n:((n-1)/2.0+1)/n) << endl;
                                                 ^
Main.java:5: error: unnamed classes are a preview feature and are disabled by default.
int main() {
^
  (use --enable-preview to enable unnamed classes)
5 errors
Language: C++

#include <iostream>
using namespace std;

int main(){
  double n;
  cin >> n;
  if(n%2 == 0){
    cout << 0.5 << endl;
  }else{
    cout << ((n+1)/2)/n << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if(n%2 == 0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: Java

import java.util.Scanner;
class {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    if(n % 2 ==0) {
      System.out.println(n/2);
    } else {
      System.out.println((n+1)/(2*n));
    }
  }
}

Compiler output:
Main.java:2: error: <identifier> expected
class {
     ^
1 error
Language: C

#include <stdio.h>

int main()
{
	int N;
	float ans;
	scanf_s("%d", &N);
	if (N % 2 == 0) {
		printf("0.5");
	}
	else {
		ans =(N+1)/(2.0*N);
		printf("%f",ans);
	}
}

Compiler output:
main.c: In function 'main':
main.c:7:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    7 |         scanf_s("%d", &N);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
#include <cstdio>

int main(int argc, char* argv[]) {
  int n;
  std::cin>>n;
  double res = 0.5;
  if (n % 2 == 1) {
    res = (double) (n+1)/(2*n);
  }
  printf("%.10f\n", ans);
}
    

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:11:21: error: 'ans' was not declared in this scope; did you mean 'abs'?
   11 |   printf("%.10f\n", ans);
      |                     ^~~
      |                     abs
Language: C

#include<stdio.h>

int main(){

    int N;
    double ans;

    scanf("%lf",&N);

    if ( N%2==0){
        ans = 2/N/N;
        printf("path1\n");
    }

    else{

        ans = (2/N +1)/N;
        printf("path2\n");
    }

    printf("%lf",ans);#include<stdio.h>

int main(){

    int N;
    double n,ans;

    scanf("%d",&N);
  	n = N;

    if ( N%2==0){
        ans = n/2/n;
    }

    else{

        ans = (n/2 +0.5)/n;
    }

    printf("%lf",ans);
  
 	return 0;

}

}

Compiler output:
main.c: In function 'main':
main.c:21:23: error: stray '#' in program
   21 |     printf("%lf",ans);#include<stdio.h>
      |                       ^
main.c:21:24: error: 'include' undeclared (first use in this function)
   21 |     printf("%lf",ans);#include<stdio.h>
      |                        ^~~~~~~
main.c:21:24: note: each undeclared identifier is reported only once for each function it appears in
main.c:21:32: error: 'stdio' undeclared (first use in this function); did you mean 'stdin'?
   21 |     printf("%lf",ans);#include<stdio.h>
      |                                ^~~~~
      |                                stdin
main.c:23:1: error: expected expression before 'int'
   23 | int main(){
      | ^~~
Language: C++

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

int main() {
  float n;
  cin >> n;
  if(n%2.0==0) n = 0.5f;
  else n = (n+1)/(2*n);
  cout << n << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'float' and 'double' to binary 'operator%'
    7 |   if(n%2.0==0) n = 0.5f;
      |      ~^~~~
      |      | |
      |      | double
      |      float
Language: C++

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

int main() {
  float n;
  cin >> n;
  if(n%2==0) n = 0.5f;
  else n = (n+1)/(2*n);
  cout << n << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'float' and 'int' to binary 'operator%'
    7 |   if(n%2==0) n = 0.5f;
      |      ~^~
      |      | |
      |      | int
      |      float
Language: C++

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

int main() {
  float n;
  cin >> n;
  if(n%2==0) n = 0.5f;
  else n = (n+1)/2n;
  cout << n << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'float' and 'int' to binary 'operator%'
    7 |   if(n%2==0) n = 0.5f;
      |      ~^~
      |      | |
      |      | int
      |      float
a.cc:8:18: error: unable to find numeric literal operator 'operator""n'
    8 |   else n = (n+1)/2n;
      |                  ^~
Language: C++

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

int main() {
  int n;
  double ans
  
  cin >> n;
  
  if(n%2==0){
    ans = 0.5
  }
  else{
    ans = n - n/2
  }
  
  cout << ans << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected initializer before 'cin'
    8 |   cin >> n;
      |   ^~~
a.cc:11:5: error: 'ans' was not declared in this scope; did you mean 'abs'?
   11 |     ans = 0.5
      |     ^~~
      |     abs
a.cc:14:5: error: 'ans' was not declared in this scope; did you mean 'abs'?
   14 |     ans = n - n/2
      |     ^~~
      |     abs
a.cc:17:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   17 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

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

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

    if(N % 2 = 0){
        int a = N / 2;
    }
    else{
        int a = N / 2 + 1;
    }
    
    double pro = a / N;

    cout << pro << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: lvalue required as left operand of assignment
    9 |     if(N % 2 = 0){
      |        ~~^~~
Language: C++

#https://atcoder.jp/contests/abc142/tasks/abc142_a
import math
N = int(input())
odd = math.ceil(N/2)
print(odd/N)

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #https
    1 | #https://atcoder.jp/contests/abc142/tasks/abc142_a
      |  ^~~~~
a.cc:2:1: error: 'import' does not name a type
    2 | import math
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include<bits/stdc++.h>
#include<iostream>
#include<stdio.h>

// #include <string>
// #define REP(i, n) for(int i = 0; i < (int)n; i++)
// #define MOD 1000000009
// using namespace std;
// typedef long long ll;
int main()
{
  int n;
  cin >> n;
  if(n %2 == 0)  {cout << 0.50 << endl;}
  else{ cout << (double)((n + 1)/2) << endl;}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   13 |   cin >> n;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 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:14:19: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   14 |   if(n %2 == 0)  {cout << 0.50 << 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:14:35: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   14 |   if(n %2 == 0)  {cout << 0.50 << endl;}
      |                                   ^~~~
      |                                   std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:15:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   15 |   else{ cout << (double)((n + 1)/2) << 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:15:40: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   15 |   else{ cout << (double)((n + 1)/2) << endl;}
      |                                        ^~~~
      |                                        std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~