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

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
 
using namespace std;
 
int main()
{
  int n ,l;
  cin >> n >> l;
  vector <string> v;
  for(int i = 0; i < n; i++)
  {
    string s;
    cin >> s;
    v.push_back(s);
  }
  
  sort(v.begin(), v.end());
  for(inti = 0; i < n; i++)
  {
    cout << v[i];
  }
  
  return 0;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:7: error: 'inti' was not declared in this scope; did you mean 'int'?
   21 |   for(inti = 0; i < n; i++)
      |       ^~~~
      |       int
a.cc:21:17: error: 'i' was not declared in this scope
   21 |   for(inti = 0; i < n; i++)
      |                 ^
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<algoritm>

using namespace std;

int main()
{
  int n ,l;
  cin >> n >> l;
  vector <string> v;
  for(int i = 0; i < n; i++)
  {
    string s;
    cin >> s;
    v.push_back(s);
  }
  
  sort(v.begin(), v.end());
  for(inti = 0; i < n; i++)
  {
    cout << v[i];
  }
  
  return 0;
  
}

Compiler output:
a.cc:4:9: fatal error: algoritm: No such file or directory
    4 | #include<algoritm>
      |         ^~~~~~~~~~
compilation terminated.
Language: C++

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

int main()
{
    int n, l;
    cin >> n >> l;
    vector<string> v;
    while (n--)
    {
	string s;
	cin >> s;
	v.push_back(s);
    }
    string result = "";
    sort(v.begin(), v.end());
    for (auto s : v)
    {
	result += s;
    }
    cout << result;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |     sort(v.begin(), v.end());
      |     ^~~~
      |     short
Language: C++

#include <bits/stdc++.h>
#include<vector>
using namespace std;
#define rep(i, n)        for(int i=0; i<(int)(n); ++i)
int main() {
  int a;
  vector<string>b(a);
  rep(i,a){
    cin>>b[i];
  }
  sort(b.begin(), b.end())；
    rep(i,a){
    cout<<b[i];
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:27: error: expected ';' before '\U0000ff1b'
   11 |   sort(b.begin(), b.end())；
      |                           ^~
      |                           ;
a.cc:12:9: error: 'i' was not declared in this scope
   12 |     rep(i,a){
      |         ^
a.cc:4:39: note: in definition of macro 'rep'
    4 | #define rep(i, n)        for(int i=0; i<(int)(n); ++i)
      |                                       ^
Language: C++

#include <iostream>
#include <string>
#include <vector>

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

int main(){
    int n, l;

    // 入力
    std::cin >> n >> l;
    
    std::vector<std::string> s(n);
    std::string ans;
    rep(i, n){
        std::cin >> s[i];

        if(s[i].size() != l) return 0;
    }

    rep(i, n){
        //std::cout << s[i][0] << std::endl;
        sort(s.begin(), s.end());
    }

    rep(i, n){
        ans += s[i];
    }

    std::cout << ans << std::endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   23 |         sort(s.begin(), s.end());
      |         ^~~~
      |         short
Language: C++

#include <iostream>
#include <iostream>
#include <string>
#include <vector>

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

int main(){
    int n, l;

    // 入力
    std::cin >> n >> l;
    
    std::vector<std::string> s(n);
    std::string ans;
    rep(i, n){
        std::cin >> s[i];

        if(s[i].size() != l) return 0;
    }

    rep(i, n){
        //std::cout << s[i][0] << std::endl;
        std::sort(s.begin(), s.end());
    }

    rep(i, n){
        ans += s[i];
    }

    std::cout << ans << std::endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:14: error: 'sort' is not a member of 'std'; did you mean 'qsort'?
   24 |         std::sort(s.begin(), s.end());
      |              ^~~~
      |              qsort
Language: C++

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

int main(){
	int A,B;
	string s;
	cin>>A>>B;
	vector<string> S(A);
	for(int i=0;i<A;i++){
		cin>>S[i];
	}
	sort(S.begin(),S.end());
	for(int i=0;i<A;i++){
		cout<<S[i];
	}
	cout<<endl;
	return 0;

}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
int n,t;
  cin>>n>>t;
  vector<string> st;
  while(n--){
    string s;
    cin>>s;
  st.push_back(s);
  }
  sort(st.begin(),st.end());
  for(int i=0;i<st.size();i++){
  cout<<v[i];
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'v' was not declared in this scope
   14 |   cout<<v[i];
      |         ^
Language: Java

import java.util.*;
class Main{
	public static void main(String [] args){
    	Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
      	int s = sc.nextInt(); 
      	List<String> res = new ArrayList();
      	
      	for(int i = 0; i < n; i++){
        	res.add(sc.nextLine());
        }
      
      	Collections.sort(res);
      	StringBuffer ret = new StringBuffer();
      	for(String a : res)
          ret.append(a);
      
      	return ret.toString(); 
    }
}

Compiler output:
Main.java:18: error: incompatible types: unexpected return value
      	return ret.toString(); 
      	                   ^
Note: Main.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
Language: Java

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

public class P8 {
    public static void main(String[] args) {
        Scanner s=new Scanner(System.in);
        int t=s.nextInt();
        int n=s.nextInt();
        s.nextLine();
        String[] arr=new String[t];
        for(int i=0;i<t;i++){
            arr[i]=s.nextLine();
        }
        Arrays.sort(arr);
        StringBuilder str=new StringBuilder();
        for(int i=0;i<arr.length;i++){
            str.append(arr[i]);
        }
        System.out.println(str);

    }
}


Compiler output:
Main.java:4: error: class P8 is public, should be declared in a file named P8.java
public class P8 {
       ^
1 error
Language: Java

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

public class Solution {
    public static void main(String[] args) {
        Scanner s=new Scanner(System.in);
        int t=s.nextInt();
        int n=s.nextInt();
        s.nextLine();
        String[] arr=new String[t];
        for(int i=0;i<t;i++){
            arr[i]=s.nextLine();
        }
        Arrays.sort(arr);
        StringBuilder str=new StringBuilder();
        for(int i=0;i<arr.length;i++){
            str.append(arr[i]);
        }
        System.out.println(str);

    }
}


Compiler output:
Main.java:4: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
1 error
Language: C++

#include <iostream>

using namespace std;

int main(){
    int N;
    cin >> N;
    char *str = new char[N];
    cin >> str;

    sort(str, str+N);
    cout << str << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |     sort(str, str+N);
      |     ^~~~
      |     short
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main(){
    int N;
    cin >> N;
    char *str = new char[N];
    cin >> str;

    sort(str, str+N);
    cout << str << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |     sort(str, str+N);
      |     ^~~~
      |     short
Language: C++

#include <iostream>
#include <vector>
#define rep(i, a, n) for(int i = a; i < n; i++)
using namespace std;
using ll  = long long;
using P = pair<int, int>;

int main()
{
    int n, l;
    cin >> n >> l;
    vector<string> s(n);
    rep(i, 0, n){
        cin >> s[i];
    }
    sort(s.begin(), s.end());
    rep(i, 0, n){
        cout << s[i];
    }
    cout << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   16 |     sort(s.begin(), s.end());
      |     ^~~~
      |     short
Language: C++

//#define _GLIBCXX_DEBUG

#include<bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
const int INF= 1e9+5;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vector<ll> >vvl;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> T;
const ll MOD=1000000007LL;
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
ll factorial(ll x){
  if(x==0)return 1;
  return x*factorial(x-1)%MOD;
}
int main(){
  ll n,l;cin>>n>>l;
  vector<string>vec(n);
  rep(i,n)cin>>vec[i];
  sort(vec.begin(),vec.end());
  string ans="";
  rep(i,h)ans+=vec[i];
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:9: error: 'h' was not declared in this scope
   26 |   rep(i,h)ans+=vec[i];
      |         ^
a.cc:6:43: note: in definition of macro 'rep'
    6 | #define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
      |                                           ^
Language: C++

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

int main()
{
  int N;
  cin >> N;
  int L;
  cin >> L;
  vector<string> x(N);
  for( int i = 0:i < N; ++i ){
     cin >> x[i]; 
  }
  sort(x.begin(),x.end());
  cout << x[0] << endl;
  return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:14: error: initializer in range-based 'for' loop
   14 |   for( int i = 0:i < N; ++i ){
      |              ^
a.cc:14:23: error: expected ')' before ';' token
   14 |   for( int i = 0:i < N; ++i ){
      |      ~                ^
      |                       )
a.cc:14:27: error: 'i' was not declared in this scope
   14 |   for( int i = 0:i < N; ++i ){
      |                           ^
Language: Java

tring allStringsSupersetSoFar = NStrings[0] /* first input String */

for(int i = 1; i < NStrings.length; i++)
{
	allStringsSupersetSoFar = formSuperSetsoFar(NStrings[i], allStringsSupersetSoFar);
}

/*  
 * Given two strings, finds the superset string in lexicographic order for
 * which both the input strings are subsequences
 */
String formSuperSetsoFar(String ithString, String allStringsSupersetSoFar)
{
	int m = allStringsSupersetSoFar.length();
        int n = ithString.length();
        int i, j = 0; /* i - index to allStringsSupersetSoFar and j - index to ithString 
        StringBuilder superSetString = new StringBuilder();
        while ( i < m && j < n)
	{
		if(allStringsSupersetSoFar [i] < ithString[j]) 
		{
			superSetString.append(allStringsSupersetSoFar [i]);
			i++;
		}
		else if (allStringsSupersetSoFar [i] > ithString[j])
		{
			superSetString.append(ithString[j]);
			j++;
		}
		else
		{
			i++; j++;
			superSetString.append(allStringsSupersetSoFar [j]);
		}
	}
        
        if(j < n)
	{
		superSetString.append(ithString.substring(j+1));
	}   

	if(i < m)
	{
				superSetString.append(allStringsSupersetSoFar.substring(i+1));
	}
	return superSetString;
}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
tring allStringsSupersetSoFar = NStrings[0] /* first input String */
^
  (use --enable-preview to enable unnamed classes)
Main.java:1: error: ';' expected
tring allStringsSupersetSoFar = NStrings[0] /* first input String */
                                           ^
Main.java:3: error: class, interface, enum, or record expected
for(int i = 1; i < NStrings.length; i++)
               ^
Main.java:3: error: class, interface, enum, or record expected
for(int i = 1; i < NStrings.length; i++)
                                    ^
Main.java:6: error: class, interface, enum, or record expected
}
^
Main.java:16: error: class, interface, enum, or record expected
        int i, j = 0; /* i - index to allStringsSupersetSoFar and j - index to ithString 
        ^
Main.java:16: error: unclosed comment
        int i, j = 0; /* i - index to allStringsSupersetSoFar and j - index to ithString 
                      ^
Main.java:47: error: reached end of file while parsing
}
 ^
8 errors
Language: C

using System; 
  
class GFG { 
      
// function to sort the 
// array of string 
static void sort(String []a, int n) 
{ 
      
    //sort the array 
    for(int i = 0;i < n;i++) 
    { 
        for(int j = i + 1;j < n;j++) 
        { 
              
            // comparing which of the 
            // two concatenation causes 
            // lexiographically smaller 
            // string 
            if((a[i] + a[j]).CompareTo(a[j] + 
                                  a[i]) > 0) 
            { 
                String s = a[i]; 
                a[i] = a[j]; 
                a[j] = s; 
            } 
        } 
    } 
} 
      
static String lexsmallest(String []a, int n) 
{ 
      
    // Sort strings 
    sort(a,n); 
  
    // Concatenating sorted  
    // strings 
    String answer = ""; 
    for (int i = 0; i < n; i++) 
        answer += a[i]; 
  
    return answer; 
} 
  
// Driver code 
public static void Main() 
{ 
    String []a = {"c", "cb", "cba"}; 
    int n = 3; 
    Console.Write("lexiographically smallest string = "
                                 + lexsmallest(a, n)); 
  
} 
} 

Compiler output:
main.c:1:1: error: unknown type name 'using'
    1 | using System;
      | ^~~~~
main.c:3:1: error: unknown type name 'class'
    3 | class GFG {
      | ^~~~~
main.c:3:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    3 | class GFG {
      |           ^
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
import java.util.Arrays;
 
public class Main {
    public static void main(String[] args) {
      Scanner scan = new Scanner(System.in);
      int N = scan.nextInt();
      int L = scan.nextInt();
      
      BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
      
      for(int i = 0; i < N; i++){
        String[] str = new String[N]
        str[i] = reader.readLine();  
      }
      
      Arrays.sort(str);
      
      for(String out : str){
        System.out.print(out);
      }
      reader.close();
      
    }
        
}

Compiler output:
Main.java:16: error: ';' expected
        String[] str = new String[N]
                                    ^
1 error
Language: C++

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


int main() {
  int N,L;
  cin>>N>>L;
 vector<string> a(N);
  for(int i=0;i<N;i++){
  cin>>a.at(i);
  }
  sort(a.begin(),a.end());
  string ans="";
  for(int i=0;i<N;i++){
  ans+=a.at(i)
  }
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: expected ';' before '}' token
   15 |   ans+=a.at(i)
      |               ^
      |               ;
   16 |   }
      |   ~
Language: C++

#include<bits/stdc++.h>
using namespace std;vector<string> n;
int N,L;
int main(){
  cin>>N>>L;string l;
  for(int i=0;i<N;++i){
    cin>>l;n.push_back(l)}
  sort(n.begin(),n.end());
  for(int i=0;i<N;++i)cout<<n[i];
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:26: error: expected ';' before '}' token
    7 |     cin>>l;n.push_back(l)}
      |                          ^
      |                          ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int L,N;
  cin >> L >> N;
  vector<stirng> S(N);
  for (int i = 0; i < N; i++){
    cin >> S[i];
  }
  sort(S.begin(),S.end());
  string ans = "";
  for (int i = 0; i < N; i++){
   ans += S[i];
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:10: error: 'stirng' was not declared in this scope
    6 |   vector<stirng> S(N);
      |          ^~~~~~
a.cc:6:16: error: template argument 1 is invalid
    6 |   vector<stirng> S(N);
      |                ^
a.cc:6:16: error: template argument 2 is invalid
a.cc:8:13: error: invalid types 'int[int]' for array subscript
    8 |     cin >> S[i];
      |             ^
a.cc:10:10: error: request for member 'begin' in 'S', which is of non-class type 'int'
   10 |   sort(S.begin(),S.end());
      |          ^~~~~
a.cc:10:20: error: request for member 'end' in 'S', which is of non-class type 'int'
   10 |   sort(S.begin(),S.end());
      |                    ^~~
a.cc:13:12: error: invalid types 'int[int]' for array subscript
   13 |    ans += S[i];
      |            ^
Language: C++

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

int main() {
	unsigned short N, L, i, j;
	char *buf, **ptr, *tmp;
	scanf("%hu %hu", &N, &L);
	scanf("%*c");
	L++;
	buf = malloc(N * L);
	ptr = malloc(sizeof(char *) * N);
	memset(buf, 0, N * L);
	memset(ptr, 0, sizeof(char *) * N);
	for (i = 0; i < N; i++) {
		ptr[i] = buf + i * L;
		scanf("%100[^\n]%*[^\n]", ptr[i]);
		scanf("%*c");
		for (j = i; 0 < j; j--) {
			if (strncmp(ptr[j], ptr[j - 1], L) < 0) {
				tmp        = ptr[j];
				ptr[j]     = ptr[j - 1];
				ptr[j - 1] = tmp;
			}
		}
	}
	for (i = 0; i < N; i++) {
		printf("%s", ptr[i]);
	}
	printf("\n");
	free(buf);
	free(ptr);
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:21: error: invalid conversion from 'void*' to 'char*' [-fpermissive]
   11 |         buf = malloc(N * L);
      |               ~~~~~~^~~~~~~
      |                     |
      |                     void*
a.cc:12:21: error: invalid conversion from 'void*' to 'char**' [-fpermissive]
   12 |         ptr = malloc(sizeof(char *) * N);
      |               ~~~~~~^~~~~~~~~~~~~~~~~~~~
      |                     |
      |                     void*
Language: C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
int main(){
  int N,L;
  int i,j;
  scanf("%d",&N);
  scanf("%d",&L)
  char S[N][L+1];
  for(i=0;i<N;i++)
  {
  	scanf("%s",S[i]);
  }
  
  char tmp[L+1];
  
  for(i=1;i<N;i++){
  	for(j=N-1;j>=i;j--){
    	if(strcmp(S[j-1],S[j])>0){
        	strcpy(tmp,S[j-1]);
          	strcpy(S[j-1],S[j]);
          	strcpy(S[j],tmp);
        }
    }
  }
  for(i=0;i<N;i++){
  	printf("%s",S[i]);
  }
 
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:17: error: expected ';' before 'char'
    9 |   scanf("%d",&L)
      |                 ^
      |                 ;
   10 |   char S[N][L+1];
      |   ~~~~           
main.c:13:20: error: 'S' undeclared (first use in this function)
   13 |         scanf("%s",S[i]);
      |                    ^
main.c:13:20: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

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

int main(){
  int N,L;
  cin >> N >> L;
  vector<string> S(N);
  for(int i=0;i<N;i=i+1){
    cin >> S.at(i);
  }
  sort(S.begin(),S.end());
  for(int x:S){
    cout << x;
  }
  cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: cannot convert 'std::__cxx11::basic_string<char>' to 'int' in initialization
   12 |   for(int x:S){
      |             ^
Language: C++

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

int main(){
  int N,L;
  cin >> N >> L;
  vector<string> S(N);
  for(int i=0;i<N;i=i+1){
    cin >> S.at(i);
  }
  sort(S.begin(),S.end());
  for(int x:S){
    cout << X;
  }
  cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: cannot convert 'std::__cxx11::basic_string<char>' to 'int' in initialization
   12 |   for(int x:S){
      |             ^
a.cc:13:13: error: 'X' was not declared in this scope
   13 |     cout << X;
      |             ^
Language: C++

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

int main(void) {
  char **p;
  char *s;
  int n, l, i;
  
  scanf("%d %d", &n, &l);
  p = (char **)malloc(n * sizeof(char *));
  
  for (i = 0; i < n; i++) {
    p[i] = malloc(l * sizeof(char) + 1);
    scanf("%s", p[i]);
  }

  qsort(p, n, sizeof(char *), strcmp);
  
  s = malloc(sizeof(char) * n * l + 1);
  
  strcpy(s, p[0]);
  
  for (i = 1; i < n; i++) {
    strcat(s, p[i]);
  }

  printf("%s\n", s);
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:18: error: invalid conversion from 'void*' to 'char*' [-fpermissive]
   14 |     p[i] = malloc(l * sizeof(char) + 1);
      |            ~~~~~~^~~~~~~~~~~~~~~~~~~~~~
      |                  |
      |                  void*
a.cc:18:31: error: invalid conversion from 'int (*)(const char*, const char*) noexcept' to '__compar_fn_t' {aka 'int (*)(const void*, const void*)'} [-fpermissive]
   18 |   qsort(p, n, sizeof(char *), strcmp);
      |                               ^~~~~~
      |                               |
      |                               int (*)(const char*, const char*) noexcept
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/c++/14/stdlib.h:36,
                 from a.cc:2:
/usr/include/stdlib.h:971:34: note:   initializing argument 4 of 'void qsort(void*, size_t, size_t, __compar_fn_t)'
  971 |                    __compar_fn_t __compar) __nonnull ((1, 4));
      |                    ~~~~~~~~~~~~~~^~~~~~~~
a.cc:20:13: error: invalid conversion from 'void*' to 'char*' [-fpermissive]
   20 |   s = malloc(sizeof(char) * n * l + 1);
      |       ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
      |             |
      |             void*
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  
  int N,L;
  int ans;
  string S[110]
  cin >> N >> L;
  
  for(int i = 0;i < N;i++)cin >> S[i];
  
  sort(S,S + N);
  
  for(int i = 0;i < N;i ++){
    
    ans += S[i];
    
  }
  cout << ans <<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected initializer before 'cin'
    8 |   cin >> N >> L;
      |   ^~~
a.cc:10:34: error: 'S' was not declared in this scope
   10 |   for(int i = 0;i < N;i++)cin >> S[i];
      |                                  ^
a.cc:12:8: error: 'S' was not declared in this scope
   12 |   sort(S,S + N);
      |        ^
Language: C++

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

int main() {
  int n,l; cin >> n >> l;
  vector<string>v(n);
  for(int i = 0; i<n; i++){
    cin >> v[i];
  }
  sort(v.begin(),v.end());
  for(int i = 0; i<n; i++){
    cout << v[i] << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:2: error: expected '}' at end of input
   14 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)
#define rep2(i, a, n) for(ll i = a; i < (ll)(n); i++)
#define memi cout << endl
#define kono(n) cout << fixed << setprecision(n)
#define all(c) (c).begin(), (c).end()
#define pb push_back
#define hina cout << ' '
#define in(n) cin >> n
#define in2(n, m) cin >> n >> m
#define in3(n, m, l) cin >> n >> m >> l
#define out(n) cout << n
const ll mei = (ll)1e9 + 7;

int main(){
  ll n;
  in(l);
  ll m;
  in(m);
  vector<string> s(n);
  rep(i, n)
    in(s[i]);
  sort(all(s));
  rep(i, n)
    out(s[i]);
  memi;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:6: error: 'l' was not declared in this scope
   19 |   in(l);
      |      ^
a.cc:11:22: note: in definition of macro 'in'
   11 | #define in(n) cin >> n
      |                      ^
Language: C++

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

int main() {
  int N, L;
  cin >> N >> L;
  vector<string> S(N);
  for (int i= 0; i < N; i++) {
    cin >> S.at(i);
  }
  sort(S.begin(), S.end());
  string out = "";
  for (int i = 0; i < N; i++) {
    out += S.at(i);
    S.pop_front;
  }
  cout << out << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:7: error: 'class std::vector<std::__cxx11::basic_string<char> >' has no member named 'pop_front'
   15 |     S.pop_front;
      |       ^~~~~~~~~
Language: C++

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

int main() {
  int N, L;
  cin >> N >> L;
  vector<string> S(N);
  for (int i= 0; i < N; i++) {
    cin >> S.at(i);
  }
  sort(S.begin(), S.end());
  string out "";
  for (int i = 0; i < N; i++) {
    out += S.at(i);
    S.pop_front;
  }
  cout << out << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:14: error: expected initializer before string constant
   12 |   string out "";
      |              ^~
a.cc:14:5: error: 'out' was not declared in this scope
   14 |     out += S.at(i);
      |     ^~~
a.cc:15:7: error: 'class std::vector<std::__cxx11::basic_string<char> >' has no member named 'pop_front'
   15 |     S.pop_front;
      |       ^~~~~~~~~
a.cc:17:11: error: 'out' was not declared in this scope
   17 |   cout << out << endl;
      |           ^~~
Language: C++

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
template<class T, class U> inline bool chmax(T& a,U b) { if (a < b) { a = b; return 1; } return 0; }
template<class T, class U> inline bool chmin(T& a,U b) { if (a > b) { a = b; return 1; } return 0; }

int main() {
    int n, l:
    cin >> n >> l;
    vector<string> s(n);
    for (auto& e : s) cin >> e;
    sort(s.begin(), s.end());
    for (auto e : s) cout << e; cout << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: found ':' in nested-name-specifier, expected '::'
    8 |     int n, l:
      |             ^
      |             ::
a.cc:8:12: error: 'l' has not been declared
    8 |     int n, l:
      |            ^
a.cc:9:9: error: qualified-id in declaration before '>>' token
    9 |     cin >> n >> l;
      |         ^~
Language: Java

import java.util.*;
public class Main {
	static int n,l;
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String[] str = scan.nextLine().split(" ");
		n = Integer.valueOf(str[0]);
		l = Integer.valueOf(str[1]);
		List<i> list = new ArrayList<i>();
		for (int i = 0;; i++) {
			if (count == n)
				break;
			String str1 = scan.nextLine();
			if (!str1.isEmpty()) {
				list.add(new i(str1));
				count++;
			}
		}
		Collections.sort(list);
		for(int i=0;i<n;i++) {
			System.out.println(list.get(i).getStr());
		}
	}
}

class i implements java.lang.Comparable<i> {

	private String str;
	
	public i(String str) {
		super();
		this.str = str;
	}

	public String getStr() {
		return str;
	}

	public void setStr(String str) {
		this.str = str;
	}

	@Override
	public int compareTo(i o) {
		int j = 0;
		int result = 0;
		while(j<str.length()) {
			result = this.str.charAt(j)-o.str.charAt(j);
			if(result == 0) {
				j++;
				result = this.str.charAt(j)-o.str.charAt(j);
			}
			else
				break;
		}
		return result;
	}
}

Compiler output:
Main.java:11: error: cannot find symbol
			if (count == n)
			    ^
  symbol:   variable count
  location: class Main
Main.java:16: error: cannot find symbol
				count++;
				^
  symbol:   variable count
  location: class Main
2 errors
Language: C++

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

int main() {
  int N, L;
  cin >> N >> L;
  vector<int> S(N);
  for (int i = 0; i < N; i++) {
    cin >> S.at(i);
  }
  sort(S.begin(), S.end());
  string ans = S.at(0);
  for (int i = 1; i < N; i++) {
    ans += S.at(i);
  }
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:20: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   12 |   string ans = S.at(0);
      |                ~~~~^~~
Language: C++

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

int main() {
  int N,L;
  cin >> N >> L;
  vector<string> S(N);
  for (int i = 0;i < N;i++) {
    cin >> S.at(i);
  }
  for (int i = 0;i < N;i++) {
    for (int j = 0;j < N;j++) {
      if (S.at(j-1) < S.at(j)) {
        string m = S.at(j)
          S.at(j) = S.at(j-1)
          S.at(j-1) = m
      }
    }
  }
  for (int i = 0;i < N;i++) {
    cout << S.at(i);
  }
  cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:11: error: expected ',' or ';' before 'S'
   15 |           S.at(j) = S.at(j-1)
      |           ^
Language: C++

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

int main() {
  int N,L;
  cin >> N >> L;
  vector<string> S(N);
  for (i = 0;i < N;i++) {
    cin >> S.at(i);
  }
  for (i = 0;i < N;i++) {
    for (j = 0;j < N;j++) {
      if (S.at(j-1) < S.at(j)) {
        string m = S.at(j)
          S.at(j) = S.at(j-1)
          S.at(j-1) = m
      }
    }
  }
  for (i = 0;i < N;i++) {
    cout << S.at(i);
  }
  cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: 'i' was not declared in this scope
    8 |   for (i = 0;i < N;i++) {
      |        ^
a.cc:11:8: error: 'i' was not declared in this scope
   11 |   for (i = 0;i < N;i++) {
      |        ^
a.cc:12:10: error: 'j' was not declared in this scope
   12 |     for (j = 0;j < N;j++) {
      |          ^
a.cc:17:7: error: expected ',' or ';' before '}' token
   17 |       }
      |       ^
a.cc:20:8: error: 'i' was not declared in this scope
   20 |   for (i = 0;i < N;i++) {
      |        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int i,N,L;
  string ans="";
  cin >> N >> L;
  vector<string> v(N);
  for(i = 0;i < n;i++)
    cin >> v[i];
  sort(v.begin(),v.end());
  for(i = 0;i < n;i++)
    ans += v[i];
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'n' was not declared in this scope
    9 |   for(i = 0;i < n;i++)
      |                 ^
a.cc:12:17: error: 'n' was not declared in this scope
   12 |   for(i = 0;i < n;i++)
      |                 ^
Language: C++

#include <iostream>
using namespace std;


int main() {
  int N, L;
  string result;
  cin >> N >> L;
  string a[N];
for (int i=0; i<N; i++) cin >> a[i];

sort(a, a+N, <string>());
for(int i=0; i<N; i++){
  result += a[i];
}
  cout << result << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:12:14: error: expected primary-expression before '<' token
   12 | sort(a, a+N, <string>());
      |              ^
a.cc:12:21: error: expected primary-expression before '>' token
   12 | sort(a, a+N, <string>());
      |                     ^
a.cc:12:23: error: expected primary-expression before ')' token
   12 | sort(a, a+N, <string>());
      |                       ^
a.cc:12:1: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 | sort(a, a+N, <string>());
      | ^~~~
      | short
Language: C++

#include <iostream>
using namespace std;


int main() {
  int N, L;
  string result;
  cin >> N >> L;
  string a[N];
for (int i=0; i<N; i++) cin >> a[i];

sort(a, a+N);
for(int i=0; i<N; i++){
  result += a[i];
}
  cout << result << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:12:1: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 | sort(a, a+N);
      | ^~~~
      | short
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		int a, b = scan.nextInt(), scan.nextInt();
		String[] ABC = new int[a];
		String small = ABC[0]; 
		String output = "";
		for (int x : ABC)
		{
			ABC[x] = scan.next();
		}
		for (int i = 1; i < ABC.length;i++)
		{
			for (int x = 1; x < ABC.length;x++)
				if (small > ABC[x]) small = ABC[x];
			output+=small;
		}
		System.out.println(small);
	}
}

Compiler output:
Main.java:6: error: ';' expected
		int a, b = scan.nextInt(), scan.nextInt();
		                               ^
1 error
Language: Java

import java.util.*;

public class Main{
	public static void main(String args[]){
		Scanner in = new Scanner(System.in);
		int n, l;
		n = in.nextInt();
		l = in.nextInt();
		
		String[] S = new String[n];
		for (int i = 0; i < n; i++) S[i] = in.nextInt();
		S.sort();
		for (int i = 0; i < n; i++) System.out.print(S[i]);
		System.out.println();
	}
}


Compiler output:
Main.java:11: error: incompatible types: int cannot be converted to String
		for (int i = 0; i < n; i++) S[i] = in.nextInt();
		                                             ^
Main.java:12: error: cannot find symbol
		S.sort();
		 ^
  symbol:   method sort()
  location: variable S of type String[]
2 errors
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int l = sc.nextInt();
    String[] s = new String[n];
    for(int i = 0; i < n; i++) {
      s[i] = sc.next();
    }
    Collections.sort(s);
    String ans = "";
    for(int i = 0; i < n; i++) {
      ans += s[i];
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:12: error: no suitable method found for sort(String[])
    Collections.sort(s);
               ^
    method Collections.<T#1>sort(List<T#1>) is not applicable
      (cannot infer type-variable(s) T#1
        (argument mismatch; String[] cannot be converted to List<T#1>))
    method Collections.<T#2>sort(List<T#2>,Comparator<? super T#2>) is not applicable
      (cannot infer type-variable(s) T#2
        (actual and formal argument lists differ in length))
  where T#1,T#2 are type-variables:
    T#1 extends Comparable<? super T#1> declared in method <T#1>sort(List<T#1>)
    T#2 extends Object declared in method <T#2>sort(List<T#2>,Comparator<? super T#2>)
1 error
Language: Java

import java.util.Scanner;
public class Main{
  public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	int length = sc.nextInt();
    int number = sc.nextInt();
    String[] strings = new String[number];
    for(int i = 0; i < number; i++)
      strings[i] = sc.next();
    
    for(int i = 0; i < strings.length; i++){
      for(int j = number - 1; j > i; j--){  //バブルソート
          if(strings[j-1].compareTo(strings[j]) > 0){
            String swap = strings[j-1];
            strings[j-1] = strings[j];
            strings[j] = swap;
        }      
      }
    }
    for(int i = 0; i < strings.length; i++){
      StringBuffer sb = new StringBuffer();
      sb.append(strings[i]);
    }
             System.out.println(sb);
    
  }
}

Compiler output:
Main.java:24: error: cannot find symbol
             System.out.println(sb);
                                ^
  symbol:   variable sb
  location: class Main
1 error
Language: Java

import java.util.Scanner;
public class Main{
  public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	int length = sc.nextInt();
    int number = sc.nextInt();
    String[] strings = new String[number];
    for(int i = 0; i < number; i++)
      strings[i] = sc.next();
    
    for(int i = 0; i < strings.length; i++){
      for(int j = number - 1; j > i; j--){  //バブルソート
          if(strings[j-1].compareTo(strings[j] > 0){
            String swap = strings[j-1];
            strings[j-1] = strings[j];
            strings[j] = swap;
        }      
      }
    }
    for(int i = 0; i < strings.length; i++){
      StringBuffer sb = new StringBuffer();
      sb.append(strings[i]);
    }
             System.out.println(sb);
    
  }
}

Compiler output:
Main.java:13: error: ')' expected
          if(strings[j-1].compareTo(strings[j] > 0){
                                                   ^
1 error
Language: C++

#include <bits/stdc++.h>
#include <iostream>
#include <string>
using namespace std;
#define REP(i,m,n) for(int i=(int)(m) ; i < (int) (n) ; ++i )
#define rep(i,n) REP(i,0,n)

int main() {
  int N,L,i,j;
  cin >> N >> L;
  vector<string> v(N);
  rep(i,N){
    cin >> v(i);
  }
  sort(v.begin(),v.end());
  rep(i,N){
    cout << v(i);
  }
  cout << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:13: error: no match for call to '(std::vector<std::__cxx11::basic_string<char> >) (int&)'
   13 |     cin >> v(i);
      |            ~^~~
a.cc:17:14: error: no match for call to '(std::vector<std::__cxx11::basic_string<char> >) (int&)'
   17 |     cout << v(i);
      |             ~^~~
Language: C++

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

int main(){
  int n,l ;
  cin >> n >> l ;
  vector<string> a(n) ;
  for(int i=0;i<n;i++) cin >> a.at(i) ;
  sort(a.begin(),a.end()) ;
  for(auto i:a) cout << i ;
  cout << endl ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'vector' was not declared in this scope
    9 |   vector<string> a(n) ;
      |   ^~~~~~
a.cc:4:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    3 | #include<algorithm>
  +++ |+#include <vector>
    4 | using namespace std ;
a.cc:9:16: error: expected primary-expression before '>' token
    9 |   vector<string> a(n) ;
      |                ^
a.cc:9:18: error: 'a' was not declared in this scope
    9 |   vector<string> a(n) ;
      |                  ^
Language: C++

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

int main(void)
{
	int n  ;
    int l  ;
    vector<string> s(n) ;

  cin >> n >> l ;
  for(int i=0;i<n;i++){
   cin >> s[i] ;
  }
  
 sort(s.begin(), s.end());

 for(int i=0;i<n;i++){
  cout << s[i] ;
  }

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:2: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |  sort(s.begin(), s.end());
      |  ^~~~
      |  short
Language: C++

#include <iostream>
#include <iomanip>
#include <vector>
#include <string>
#include <algoritm>
using namespace std;

int main() {
  int n, l;
  cin >> n >> l;
  vector<string> strVec(n);
  for (int i = 0; i < n; i++) {
    cin >> setw(l) >> strVec[i];
  }
  sort(strVec.begin(), strVec.end());
  string res = "";
  for (int i = 0; i < n; i++) {
    res = res + strVec[i];
  }
  cout << res << endl;
}

Compiler output:
a.cc:5:10: fatal error: algoritm: No such file or directory
    5 | #include <algoritm>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
  int n, l;
  cin >> n >> l;
  vector<string> strVec(n);
  for (int i = 0; i < n; i++) {
    cin >> setw(l) >> strVec[i];
  }
  sort(strVec.begin(), strVec.end());
  string res = "";
  for (int i = 0; i < n; i++) {
    res = res + strVec[i];
  }
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   14 |   sort(strVec.begin(), strVec.end());
      |   ^~~~
      |   short
Language: C++

int main(){
    int n,l;
    cin >> n;
    cin >> l;
    string str[l];
    string ans;
    
    for(int i=0;i<n;i++){
        cin >> str[i];
    }
    sort(str,str+n);
    for(int i=0;i<n;i++){
        cout << str[i];
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> n;
      |     ^~~
a.cc:5:5: error: 'string' was not declared in this scope
    5 |     string str[l];
      |     ^~~~~~
a.cc:6:11: error: expected ';' before 'ans'
    6 |     string ans;
      |           ^~~~
      |           ;
a.cc:9:16: error: 'str' was not declared in this scope; did you mean 'std'?
    9 |         cin >> str[i];
      |                ^~~
      |                std
a.cc:11:10: error: 'str' was not declared in this scope; did you mean 'std'?
   11 |     sort(str,str+n);
      |          ^~~
      |          std
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |     sort(str,str+n);
      |     ^~~~
      |     short
a.cc:13:9: error: 'cout' was not declared in this scope
   13 |         cout << str[i];
      |         ^~~~
Language: C++

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

int main(void){
	int N,L;
    string s;
    cin >> N >> L;
  	vector<string> v_s;
    while(getline(cin, s)){
    	v_s.push_back(s);
    }
	sort(v_s.begin(),v_s.end());
	s = "";
    for(auto& t_s : v_s){
      s += t_s;
    }
    cout << t_s;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:13: error: 't_s' was not declared in this scope; did you mean 'v_s'?
   20 |     cout << t_s;
      |             ^~~
      |             v_s
Language: C++

#include<iostream>
#include<string>
using namespace std;
 
bool Smaller(char a[], int a_length, char b[], int b_length){
  	int i;
  	int min_length = a_length < b_length ? a_length : b_length;
  	for(i=0; i<min_length; i++){
      if(a[i] < b[i])return true;
      else if(a[i] > b[i]) return false;
    }
  	return false;
  }
 
void Swap(char a[], char b[], int length){
  int i;
  for(i=0;i<length;i++){
    char c;
    c = a[i];
   	a[i] = b[i];
    b[i] = c;
  }
  return;
}
 
int main(){
  cin >> string_length >> string_num;
  
  char strContainer[string_num][string_length];
  
  int i;
  
  for(i=0;i<string_num;i++){
    cin >> strContainer[i];
  }
  
  //今回はバブルソートで
  bool sorting = true;
  while(sorting){
    sorting=false;
    for(i=0;i<sorting_num-1;i++){
      if(!Smaller(strContainer[i], string_length, strContainer[i+1], string_length){
      	Swap(strContainer[i], strContainer[i+1], string_length);
        sorting=true;
      }
    }
    
    char result[] = "";
    
    for(i=0; i < string_num;i++){
      cout << strContainer[i];
    }
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:10: error: 'string_length' was not declared in this scope
   27 |   cin >> string_length >> string_num;
      |          ^~~~~~~~~~~~~
a.cc:27:27: error: 'string_num' was not declared in this scope
   27 |   cin >> string_length >> string_num;
      |                           ^~~~~~~~~~
a.cc:34:12: error: 'strContainer' was not declared in this scope
   34 |     cin >> strContainer[i];
      |            ^~~~~~~~~~~~
a.cc:41:15: error: 'sorting_num' was not declared in this scope; did you mean 'sorting'?
   41 |     for(i=0;i<sorting_num-1;i++){
      |               ^~~~~~~~~~~
      |               sorting
a.cc:42:19: error: 'strContainer' was not declared in this scope
   42 |       if(!Smaller(strContainer[i], string_length, strContainer[i+1], string_length){
      |                   ^~~~~~~~~~~~
a.cc:42:84: error: expected ')' before '{' token
   42 |       if(!Smaller(strContainer[i], string_length, strContainer[i+1], string_length){
      |         ~                                                                          ^
      |                                                                                    )
a.cc:46:5: error: expected primary-expression before '}' token
   46 |     }
      |     ^
a.cc:51:15: error: 'strContainer' was not declared in this scope
   51 |       cout << strContainer[i];
      |               ^~~~~~~~~~~~
Language: C++

#include<iostream>
#include<string>
#include<vector>
 
int main(){
    
  int string_length;
  int string_num;
  std::cin >> string_length >> string_num;
 
  std::vector<std::string> strings;
  
  int i;
  for(i=0; i < string_num; i++){
    std::string input;
    std::cin >> input;
    strings.push_back(input);
  }
  
  std::string result;
  
  while(strings.size() > 0){
    std::string minimum;
    int minimum_pos;
    
	minimum = strings[0];
    minimum_pos = 0;
    
    for(i=0; i<strings.size(); i++){
      if(strings[i].compare(minimum) < 0){
        minimum = strings[i];
        minimum_pos = i;
      }
    }
    result = result + minimum;
  	strings.erase(strings.begin() + minimum_pos);
  }
  
  std::cout << result << endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:39:26: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   39 |   std::cout << result << endl;
      |                          ^~~~
      |                          std::endl
In file included from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

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





using namespace std;

typedef long long int ll;
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define vsort(a) sort(a.begin(), a.end())
#define rev(a) reverse(a.begin(), a.end());
const int MOD = 1000000007;
const int INF = INT_MAX;
const double PI = 3.14159265358979323846;



int main(int argc, char const *argv[])
{

    int n, l;
    cin >> n >> l;
    string s[n];
    for (int i=0; i < n; i++){
        cin >> s[i];
    }

    sort(s, s+n);


    for (int i=0; i < n; i++){
        cout << s[i];
    }
    cout << endl;


    



    return 0;
}




//              g++ -std=c++1z  

Compiler output:
a.cc:17:17: error: 'INT_MAX' was not declared in this scope
   17 | const int INF = INT_MAX;
      |                 ^~~~~~~
a.cc:5:1: note: 'INT_MAX' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    4 | #include <vector>
  +++ |+#include <climits>
    5 | 
a.cc: In function 'int main(int, const char**)':
a.cc:32:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   32 |     sort(s, s+n);
      |     ^~~~
      |     sqrt
Language: C++

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





using namespace std;

typedef long long int ll;
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define vsort(a) sort(a.begin(), a.end())
#define rev(a) reverse(a.begin(), a.end());
const int MOD = 1000000007;
const int INF = INT_MAX;
const double PI = 3.14159265358979323846;



int main(int argc, char const *argv[])
{

    int n, l;
    cin >> n >> l;
    string s[n];
    for (int i=0; i < n; i++){
        cin >> s[i];
    }

    sort(s, s+n);


    for (int i=0; i < n; i++){
        cout << s[i];
    }
    


    



    return 0;
}




//              g++ -std=c++1z  

Compiler output:
a.cc:17:17: error: 'INT_MAX' was not declared in this scope
   17 | const int INF = INT_MAX;
      |                 ^~~~~~~
a.cc:5:1: note: 'INT_MAX' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    4 | #include <vector>
  +++ |+#include <climits>
    5 | 
a.cc: In function 'int main(int, const char**)':
a.cc:32:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   32 |     sort(s, s+n);
      |     ^~~~
      |     sqrt
Language: C++

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

int main(){
  string ans, ct[109];
  int n, l;
  cin >> n >> l;
  for(int i = 0; i < n; i++)
    cin >> ct[i];
  sort(ct.begin(),ct.end());
  ans = ct[0];
  for(int i = 1; i < n; i++)
    ans = ans + ct[i];
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:11: error: request for member 'begin' in 'ct', which is of non-class type 'std::string [109]' {aka 'std::__cxx11::basic_string<char> [109]'}
   10 |   sort(ct.begin(),ct.end());
      |           ^~~~~
a.cc:10:22: error: request for member 'end' in 'ct', which is of non-class type 'std::string [109]' {aka 'std::__cxx11::basic_string<char> [109]'}
   10 |   sort(ct.begin(),ct.end());
      |                      ^~~
Language: C++

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

int main(){
  string ans, ct[109];
  int n, l;
  cin >> n >> l;
  for(int i = 0; i < n; i++)
    ct.push_back(i);
  sort(ct.begin(),ct.end());
  ans = ct[0];
  for(int i = 1; i < n; i++)
    ans = ans + ct[i];
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: request for member 'push_back' in 'ct', which is of non-class type 'std::string [109]' {aka 'std::__cxx11::basic_string<char> [109]'}
    9 |     ct.push_back(i);
      |        ^~~~~~~~~
a.cc:10:11: error: request for member 'begin' in 'ct', which is of non-class type 'std::string [109]' {aka 'std::__cxx11::basic_string<char> [109]'}
   10 |   sort(ct.begin(),ct.end());
      |           ^~~~~
a.cc:10:22: error: request for member 'end' in 'ct', which is of non-class type 'std::string [109]' {aka 'std::__cxx11::basic_string<char> [109]'}
   10 |   sort(ct.begin(),ct.end());
      |                      ^~~
Language: C++

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

int main()
{
	
	int n,l;
	cin>>n>>l;
	string s[n];
	for(int i=0;i<n;i++)
	{
		cin>>s[i];
	}
	sort(s,s+n);
	string res;
	for(int i=0;i<n;i++)
	{
		res+=s[i];
	}
	cout<<res<<endl;
	return 0;
	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   16 |         sort(s,s+n);
      |         ^~~~
      |         short