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

#include<bits/stdc++.h>
using namespace std;
int len,n;
string st;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
    cin>>st;
    len=st.length();
    if cout<<st[0]<<len-2<<st[len-1]<<endl;
    else cout<<st<<endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:8: error: expected '(' before 'cout'
   12 |     if cout<<st[0]<<len-2<<st[len-1]<<endl;
      |        ^~~~
      |        (
a.cc:13:5: error: 'else' without a previous 'if'
   13 |     else cout<<st<<endl;
      |     ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  // ここにプログラムを追記
  string s;
  cin >> s;
  cout << s.at(0) << s.size()-2 << s.at(s.size-1) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:43: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    8 |   cout << s.at(0) << s.size()-2 << s.at(s.size-1) << endl;
      |                                         ~~^~~~
      |                                               ()
Language: C++

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

int main(){
  string s;
  cin >> s;
  int i;
  int siz = s.size();
  int counter = 0;

  for(i=0;i<siz;i++){
    if(i != 0 || i != siz-1) counter++;
  }
  string ans = s[0] + counter + s[siz-1];

  cout <<s[0] << counter << s[siz-1] << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:31: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   14 |   string ans = s[0] + counter + s[siz-1];
Language: C++

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

int main(){
  string s;
  cin >> s;
  int i;
  int siz = s.size();
  int counter = 0;

  for(i=0;i<siz;i++){
    if(i != 0 || i != siz-1) counter++;
  }
  string ans = s[0] + counter + s[size-1];

  cout <<s[0] << counter << s[siz-1] << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:39: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator-'
   14 |   string ans = s[0] + counter + s[size-1];
      |                                   ~~~~^~
Language: Java

import java.util.*;

public class Main{
	public static void main(String[] args){
    	Scanner scan = new Scanner(System.in);
      	String s = scan.nextLine();
      	int size = s.length();
      	String a = s.charAt(0);
      	String z = s.charAt(size - 1);
      	Syste.out.print(a + size - 2 + z);
    }
  
}

Compiler output:
Main.java:8: error: incompatible types: char cannot be converted to String
      	String a = s.charAt(0);
      	                   ^
Main.java:9: error: incompatible types: char cannot be converted to String
      	String z = s.charAt(size - 1);
      	                   ^
Main.java:10: error: bad operand types for binary operator '-'
      	Syste.out.print(a + size - 2 + z);
      	                         ^
  first type:  String
  second type: int
Main.java:10: error: package Syste does not exist
      	Syste.out.print(a + size - 2 + z);
      	     ^
4 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define cinf(n,x) for(int i=0;i<(n);I++) cin >> x[i];

int main(){
  string s;
  int >> s;
  cout << s[0] << s.size() -2 << s[s.size() -1] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: expected unqualified-id before '>>' token
    7 |   int >> s;
      |       ^~
Language: Java

import java.util.*;
public class Main{public static void main(String[]args){
Scanner sc=new Scanner(System.in);
  String po=sc.nextInt();
  int size=po.length()-2;
  System.out.println(po.substring(0,1)+size+po.substring(po.length()-1));
}}


Compiler output:
Main.java:4: error: incompatible types: int cannot be converted to String
  String po=sc.nextInt();
                      ^
1 error
Language: C++

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

int main(){

  string S;
  getline(cin, S);

  cout << S[0] << S.size()-2; << S[S.size()-1] << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:31: error: expected primary-expression before '<<' token
   10 |   cout << S[0] << S.size()-2; << S[S.size()-1] << endl;
      |                               ^~
Language: C

#include<stdio.h>
#include<string.h>
int main(){
  str S[200];
  scanf("%s",S);
  printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:4:3: error: unknown type name 'str'
    4 |   str S[200];
      |   ^~~
main.c:6:33: error: passing argument 1 of 'strlen' from incompatible pointer type [-Wincompatible-pointer-types]
    6 |   printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
      |                                 ^
      |                                 |
      |                                 int *
In file included from main.c:2:
/usr/include/string.h:407:35: note: expected 'const char *' but argument is of type 'int *'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
main.c:6:47: error: passing argument 1 of 'strlen' from incompatible pointer type [-Wincompatible-pointer-types]
    6 |   printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
      |                                               ^
      |                                               |
      |                                               int *
/usr/include/string.h:407:35: note: expected 'const char *' but argument is of type 'int *'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
Language: C

#include<stdio.h>

int main(){
  str S[200];
  scanf("%s",S);
  printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:3: error: unknown type name 'str'
    4 |   str S[200];
      |   ^~~
main.c:6:26: error: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
    6 |   printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
      |                          ^~~~~~
main.c:2:1: note: include '<string.h>' or provide a declaration of 'strlen'
    1 | #include<stdio.h>
  +++ |+#include <string.h>
    2 | 
main.c:6:26: warning: incompatible implicit declaration of built-in function 'strlen' [-Wbuiltin-declaration-mismatch]
    6 |   printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
      |                          ^~~~~~
main.c:6:26: note: include '<string.h>' or provide a declaration of 'strlen'
main.c:6:33: error: passing argument 1 of 'strlen' from incompatible pointer type [-Wincompatible-pointer-types]
    6 |   printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
      |                                 ^
      |                                 |
      |                                 int *
main.c:6:33: note: expected 'const char *' but argument is of type 'int *'
main.c:6:47: error: passing argument 1 of 'strlen' from incompatible pointer type [-Wincompatible-pointer-types]
    6 |   printf("%c%d%c\n",S[0],strlen(S)-2,S[strlen(S)-1]);
      |                                               ^
      |                                               |
      |                                               int *
main.c:6:47: note: expected 'const char *' but argument is of type 'int *'
Language: C++

#include<bits/stdc++.h>
#define ll long long
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
signed main(){
	string s;
	cin>>s;
	couts[0]<<s.size()-2<<s[s.size()-1]<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'couts' was not declared in this scope
    8 |         couts[0]<<s.size()-2<<s[s.size()-1]<<endl;
      |         ^~~~~
Language: C++

#include<iostream>
using namespace std;
int main(){
  string a;
  cin >> a;
  cout << a[1] << a.size()-2 << a[:-1] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:35: error: expected primary-expression before ':' token
    6 |   cout << a[1] << a.size()-2 << a[:-1] << endl;
      |                                   ^
a.cc:6:35: error: expected ']' before ':' token
    6 |   cout << a[1] << a.size()-2 << a[:-1] << endl;
      |                                   ^
      |                                   ]
Language: C++

#include <iostream>
using namespace std;

int main(){
  string s;
  int a;
  cin >> s;
  a = s.size - 2;
  cout << s[0] << a << s[s.size-1] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    8 |   a = s.size - 2;
      |       ~~^~~~
      |             ()
a.cc:9:28: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    9 |   cout << s[0] << a << s[s.size-1] << endl;
      |                          ~~^~~~
      |                                ()
Language: C++

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstring>
#include<string>
#include<algorithm>
#include<queue>
#include<stack>
#include<set>
#include<map>
#include<vector>

#define r(a,b,c) for(int a=b;a<=c;++a)
#define INF 0x7fffffff

using namespace std;

inline int read()
{
    int a=0,b=1;
    char c=getchar();
    while(c<='0'||c>'9')
    {
        if(c=='-')
        {
            b=-1;
        }
        c=getchar();
    }
    while(c>='0'&&c<='9')
    {
        a=a*10+c-'0';
        c=getchar();
    }
    return a*b;
}

void write(int n)
{
    if(n<0)
    {
        n=-n;
        putchar('-');
    }
    if(n>10)
    {
        write(n/10);
    }
    putchar(n%10+'0');
}
char a[10001];
int main()
{
    cin>>a;
    cout<<a[0]<<strlen(a)-2<<a[strlen(a)-1]<<endl;；
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:56:51: error: '\U0000ff1b' was not declared in this scope
   56 |     cout<<a[0]<<strlen(a)-2<<a[strlen(a)-1]<<endl;；
      |                                                   ^~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  cin>>s;
  cout<<s.[0]<<(int)s.size()-2<<s.back();
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: expected unqualified-id before '[' token
    6 |   cout<<s.[0]<<(int)s.size()-2<<s.back();
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  cin>>s;
  cout<<s.[0]<<s.size()-2<<s.back();
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: expected unqualified-id before '[' token
    6 |   cout<<s.[0]<<s.size()-2<<s.back();
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
string s;
  cin >> s;
  int c = s.size()
    cout << s[0] << c-2 << s[c-1]<< endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected ',' or ';' before 'cout'
    8 |     cout << s[0] << c-2 << s[c-1]<< endl;
      |     ^~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  string s;cin>>s;
  cout<<a[0]<<s.size()-2<<s[s.size()-1]<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'a' was not declared in this scope
    6 |   cout<<a[0]<<s.size()-2<<s[s.size()-1]<<endl;
      |         ^
Language: Java

import java.util.*;

public class Main {
	public static void main(String[] orgs) {
		Scanner sc = new Scanner(System.in);
		String S = sc.nextln();
		int L = S.length() - 2;
		int size = S.length();
		int cut_length = 1;
		System.out.println(S.charAt(1) + L + S.substring(size - cut_length));
	}
}

Compiler output:
Main.java:6: error: cannot find symbol
		String S = sc.nextln();
		             ^
  symbol:   method nextln()
  location: variable sc of type Scanner
1 error
Language: Java

import java.util.*;

public class Main {
	public static void main(String[] orgs) {
		Scanner sc = new Scanner(System.in);
		String S = sc.nextln();
		int L = S.length() - 2
		int size = S.length();
		int cut_length = 1;
		System.out.println(S.charAt(1) + L + S.substring(size - cut_length));
	}
}

Compiler output:
Main.java:7: error: ';' expected
		int L = S.length() - 2
		                      ^
1 error
Language: C++

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		String S = sc.next();

		if(S.length() > 2) {
			String h = S.substring(0, 1);
			String t = S.substring(S.length()-1,S.length());

			int length = S.length()-2;
			System.out.println(h + length + t);
		} else {
			System.out.println(S);
		}
	}
}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

#include <iostream>

using namespace std

int main () {
    string str;
    cin >> str;
    cout << str[0] << str.length()-2 << str[str.length()-1] << endl; 
    return 0;
}

Compiler output:
a.cc:3:20: error: expected ';' before 'int'
    3 | using namespace std
      |                    ^
      |                    ;
    4 | 
    5 | int main () {
      | ~~~
Language: C++

#include<iostream>
#include<string>

using namespace std;
int main()
{
  char s;
  cin >> s;
  
  char u = s.end();
  int size = s.size();
  if(size < 2){
    size = 0;
  }
  else {
    size -= 2; 
  }
  cout << s[0] + size + u << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:14: error: request for member 'end' in 's', which is of non-class type 'char'
   10 |   char u = s.end();
      |              ^~~
a.cc:11:16: error: request for member 'size' in 's', which is of non-class type 'char'
   11 |   int size = s.size();
      |                ^~~~
a.cc:18:12: error: invalid types 'char[int]' for array subscript
   18 |   cout << s[0] + size + u << endl;
      |            ^
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main()
{
  string s; cin >> s;
  string t = s(0);
  string u = s.end();
  int count = 0;
  for(int i = 0; i<100; ++i){
    if(s[i] != "") ++count;
  }
  if(count <= 2)count = 0;
  else count -= 2;
  cout << "t" + count + "u" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: no match for call to '(std::string {aka std::__cxx11::basic_string<char>}) (int)'
    8 |   string t = s(0);
      |              ~^~~
a.cc:9:19: error: conversion from 'std::__cxx11::basic_string<char>::iterator' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    9 |   string u = s.end();
      |              ~~~~~^~
a.cc:12:13: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   12 |     if(s[i] != "") ++count;
a.cc:16:23: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   16 |   cout << "t" + count + "u" << endl;
      |           ~~~~~~~~~~~ ^ ~~~
      |               |         |
      |               |         const char [2]
      |               const char*
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main()
{
  string s; cin >> s;
  string t = s[0];
  string u = s.end();
  int count = 0;
  for(int i = 0; i<100; ++i){
    if(s[i] != "") ++count;
  }
  if(count <= 2)count = 0;
  else count -= 2;
  cout << "t" + count + "u" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string t = s[0];
      |                 ^
a.cc:9:19: error: conversion from 'std::__cxx11::basic_string<char>::iterator' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    9 |   string u = s.end();
      |              ~~~~~^~
a.cc:12:13: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   12 |     if(s[i] != "") ++count;
a.cc:16:23: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   16 |   cout << "t" + count + "u" << endl;
      |           ~~~~~~~~~~~ ^ ~~~
      |               |         |
      |               |         const char [2]
      |               const char*
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main()
{
  string s; cin >> s;
  string t = s[0];
  string u = s.end();
  int count = 0;
  for(int i = 0; i<100; ++i){
    if(s[i] != "0") ++count;
  }
  if(count <= 2)count = 0;
  else count -= 2;
  cout << "t" + count + "u" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string t = s[0];
      |                 ^
a.cc:9:19: error: conversion from 'std::__cxx11::basic_string<char>::iterator' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    9 |   string u = s.end();
      |              ~~~~~^~
a.cc:12:13: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   12 |     if(s[i] != "0") ++count;
a.cc:16:23: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   16 |   cout << "t" + count + "u" << endl;
      |           ~~~~~~~~~~~ ^ ~~~
      |               |         |
      |               |         const char [2]
      |               const char*
Language: C++

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

int main() {
  string s;
  cin >> s;
  int b = s.size() - 2;
  char a = s[0];
  char c = s[s.size()];
  string str = abc;
  cout << str << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: 'abc' was not declared in this scope; did you mean 'abs'?
   11 |   string str = abc;
      |                ^~~
      |                abs
Language: C++

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

int main() {
  string s;
  cin >> s;
  int b = s.size() - 2;
  char a = s[0];
  char c = s[s.size()]
  string str = "abc";
  cout >> str >> endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:3: error: expected ',' or ';' before 'string'
   11 |   string str = "abc";
      |   ^~~~~~
a.cc:12:11: error: 'str' was not declared in this scope; did you mean 'std'?
   12 |   cout >> str >> endl;
      |           ^~~
      |           std
Language: C++

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

int main() {
  string s;
  cin >> s;
  int b = s.size() - 2;
  char a = s[0];
  char c = s[s.size()]
  string str = "abc";
  cout >> str >> endl;
}

Compiler output:
a.cc:3:16: error: expected identifier before ';' token
    3 | using namespace;
      |                ^
a.cc: In function 'int main()':
a.cc:6:3: error: 'string' was not declared in this scope
    6 |   string s;
      |   ^~~~~~
a.cc:6:3: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin >> s;
      |   ^~~
      |   std::cin
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:10: error: 's' was not declared in this scope
    7 |   cin >> s;
      |          ^
a.cc:12:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |   cout >> str >> 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:12:11: error: 'str' was not declared in this scope; did you mean 'std'?
   12 |   cout >> str >> endl;
      |           ^~~
      |           std
a.cc:12:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |   cout >> str >> endl;
      |                  ^~~~
      |                  std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <ioestream>
#include <string>
using namespace;

int main() {
  string s;
  cin >> s;
  int b = s.size() - 2;
  char a = s[0];
  char c = s[s.size()]
  string str = "abc";
  cout >> str >> endl;
}

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

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

int main(){
string a;
cin >> a;
cout<<a[0]<<a.size()-2<<a[a.size()-1]<<endl;
}

Compiler output:
a.cc:2:2: error: invalid preprocessing directive #unclude; did you mean #include?
    2 | #unclude <string>
      |  ^~~~~~~
      |  include
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  cin>>s
  int a=s.length()-2;
  cout<<s[0]<<a<<s[s.size()-1];
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: expected ';' before 'int'
    5 |   cin>>s
      |         ^
      |         ;
    6 |   int a=s.length()-2;
      |   ~~~    
a.cc:7:15: error: 'a' was not declared in this scope
    7 |   cout<<s[0]<<a<<s[s.size()-1];
      |               ^
Language: C++

using System;
class Program
{
	static void Main()
	{
	string s = Console.ReadLine();
	Console.WriteLine(s[0] + (s.Length-2).ToString() + s[s.Length-1]);//WriteLineをWriteとすると、改行なしで出力。
	}
}


Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:9:2: error: expected ';' after class definition
    9 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Program::Main()':
a.cc:6:9: error: 'string' was not declared in this scope
    6 |         string s = Console.ReadLine();
      |         ^~~~~~
a.cc:7:9: error: 'Console' was not declared in this scope
    7 |         Console.WriteLine(s[0] + (s.Length-2).ToString() + s[s.Length-1]);//WriteLineをWriteとすると、改行なしで出力。
      |         ^~~~~~~
a.cc:7:27: error: 's' was not declared in this scope
    7 |         Console.WriteLine(s[0] + (s.Length-2).ToString() + s[s.Length-1]);//WriteLineをWriteとすると、改行なしで出力。
      |                           ^
Language: C++

#include <iostream>
#include <string>

int main() {
  std::string s;
  std::sin >> s;

  int n = s.length();
  int abbreviate = n - 2;
  std::cout << s[0] << abbreviate << s[n - 1] << std::endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: 'sin' is not a member of 'std'; did you mean 'min'?
    6 |   std::sin >> s;
      |        ^~~
      |        min
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main()
{
  string s;
  cin >> s;
  cout << s.front() << s.size - 2 << s.back();
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:26: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   10 |   cout << s.front() << s.size - 2 << s.back();
      |                        ~~^~~~
      |                              ()
Language: C++

#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define FORR(i, m, n) for(int i = m;i >= n;i--)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define llong long long
#define pb(a) push_back(a)
#define INF 1000000000
using namespace std;
typedef pair<int, int> P;
typedef pair<llong, llong> LP;
typedef pair<int, P> PP;
typedef pair<llong, LP> LPP;

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

int Digits(llong num){
  int cnt = 0;
  while(num > 0){
    num / 10;
    cnt++;
  }
  return cnt;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    string S;
    cin >> S;
    len = S.size();
    cout << S[0] << len -2 << S[len] << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:34:5: error: 'len' was not declared in this scope
   34 |     len = S.size();
      |     ^~~
Language: C++

#include <iostream>
#include <math.h>
using namespace std;

int main() {
	string s;

	cin >> s;



	cout << s[0]  << s.size()<< s[s.size-1];

}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:41: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   12 |         cout << s[0]  << s.size()<< s[s.size-1];
      |                                       ~~^~~~
      |                                             ()
Language: C++

#include<iostream>
#include<string>

using namespace std;

int main(){
   string s;
   cin >> s;
   string ans;
   cin >> ans;

   a = s[0];
   b = s.length();
   c = s[b-1];

   ans[0] = s[0];
   ans[1] = s.length() -2;
   ans[2] = s[s.length() -1];

   cout << ans << endl;
   return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:4: error: 'a' was not declared in this scope
   12 |    a = s[0];
      |    ^
a.cc:13:4: error: 'b' was not declared in this scope
   13 |    b = s.length();
      |    ^
a.cc:14:4: error: 'c' was not declared in this scope
   14 |    c = s[b-1];
      |    ^
Language: C++

#include<iostream>
#include<string>

using namespace std;

int main(){
   string s;
   cin >> s;
   string ans;
   cin >> ans;

   a = s[0];
   b = s.length();
   c = s[b-1];

   ans[0] = a;
   ans[1] = b-2;
   ans[2] = c;

   cout << ans << endl;
   return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:4: error: 'a' was not declared in this scope
   12 |    a = s[0];
      |    ^
a.cc:13:4: error: 'b' was not declared in this scope
   13 |    b = s.length();
      |    ^
a.cc:14:4: error: 'c' was not declared in this scope
   14 |    c = s[b-1];
      |    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  str s; 
  cin >> s;
  cout << s.at(0) << s.size()-2 << s.at(s.size()-1) << endl; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'str' was not declared in this scope; did you mean 'std'?
    5 |   str s;
      |   ^~~
      |   std
a.cc:6:10: error: 's' was not declared in this scope
    6 |   cin >> s;
      |          ^
Language: C++


#include <iostream>
#include <string>
using namespace std;
int main(void){
    string a;
    cin>>a;
    cout<<a[1]<<a.size()-=2<<a[a.size()-1]<<endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:43: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    8 |     cout<<a[1]<<a.size()-=2<<a[a.size()-1]<<endl;
      |                           ~~~~~~~~~~~~~~~~^~~~~~
Language: C++


#include <iostream>
#include <string>
using namespace std;
int main(void){
    string a;
    cin>>a;
    cout<<a[1]<<a.size()-=2<<a.[a.size()-1]<<endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:32: error: expected unqualified-id before '[' token
    8 |     cout<<a[1]<<a.size()-=2<<a.[a.size()-1]<<endl;
      |                                ^
Language: C++

#include <iostream>
#include <string>
using namespace std;
int main(void){
    string a;
    cin>>a;
    cout<<a.front()<<a.size()-=2<<a.back()<<endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:43: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    7 |     cout<<a.front()<<a.size()-=2<<a.back()<<endl;
      |                                ~~~~~~~~~~~^~~~~~
Language: Java

import java.io.*;
public class I18N {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String s = br.readLine();
        System.out.println(s.substring(0, 1) + (s.length() - 2) + s.substring(s.length() - 1, s.length()));
    }
}

Compiler output:
Main.java:2: error: class I18N is public, should be declared in a file named I18N.java
public class I18N {
       ^
1 error
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main() {
  string s;
  cin >> s;
  int N = s.size();
  cout << s[0] + tostring(N - 2) + s.back() << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: 'tostring' was not declared in this scope
   10 |   cout << s[0] + tostring(N - 2) + s.back() << endl;
      |                  ^~~~~~~~
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		String top = s.substring(0,1);
		String finish =  s.substring(s.length()-2,s.length()-1);
		//System.out.println(top);
		//System.out.println(finish);
		
		

		System.out.println(top + ""+ s.length()-2 + "" + finish );
		
		
		
		
	
	}
}


Compiler output:
Main.java:13: error: bad operand types for binary operator '-'
		System.out.println(top + ""+ s.length()-2 + "" + finish );
		                                       ^
  first type:  String
  second type: int
1 error
Language: C++

#include <iostream>
using namespace std;

int main() {
    string s;
    cin >> s;

    string output;
    output = s[0] + s.length - 2 + s[s.length() - 1];
    cout << output << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:23: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    9 |     output = s[0] + s.length - 2 + s[s.length() - 1];
      |                     ~~^~~~~~
      |                             ()
Language: C++

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

int main()
{
  string s;
  cin >> s;
  int len;
  len = strlen(s);
  len -= 2;
  cout << s[0] << len << s[len + 1] << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:16: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'const char*'
   10 |   len = strlen(s);
      |                ^
      |                |
      |                std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/cstring:43,
                 from a.cc:2:
/usr/include/string.h:407:35: note:   initializing argument 1 of 'size_t strlen(const char*)'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
Language: C++

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

int main()
{
  string s;
  cin >> s;
  len = strlen(s);
  len -= 2;
  cout << s[0] << len << s[len + 1] << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'len' was not declared in this scope; did you mean 'mblen'?
    9 |   len = strlen(s);
      |   ^~~
      |   mblen
a.cc:9:16: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'const char*'
    9 |   len = strlen(s);
      |                ^
      |                |
      |                std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/cstring:43,
                 from a.cc:2:
/usr/include/string.h:407:35: note:   initializing argument 1 of 'size_t strlen(const char*)'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
Language: C++



#include <iostream>
#include <string>
#include<algorithm>
#include <cstdlib>
#include <cmath>
#include <regex>

using namespace std;
int main()
{
	string s;
	cin >> s;
	cout << s[0] << s.length() - 2 << s[s.length - 1] << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:47: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   15 |         cout << s[0] << s.length() - 2 << s[s.length - 1] << endl;
      |                                             ~~^~~~~~
      |                                                     ()
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(){
    string s;
    int i;
    int p;
    cin >> s;
    i = s.length;
    p= i - 2;
    cout << s[0] << i << s[p] << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: cannot convert 'std::__cxx11::basic_string<char>::length' from type 'std::__cxx11::basic_string<char>::size_type (std::__cxx11::basic_string<char>::)() const noexcept' {aka 'long unsigned int (std::__cxx11::basic_string<char>::)() const noexcept'} to type 'int'
    9 |     i = s.length;
      |           ^~~~~~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(){
    string s;
    int i;
    cin >> s;
    i=s.length-2
    cout<<s[0]<<i<<s[s.length]
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    8 |     i=s.length-2
      |       ~~^~~~~~
      |               ()
Language: C++

#include <bits/stdc++.h>

#define o(output) cout << output << endl
#define priolity_queue pq
#define push p
#define top t

using namespace std;

string s;
int a,b,c,d;
char A,B;

int main(){
  cin>>s;
  cout<<s[0]<<s.size()-2<<s[s.size()-1]
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:40: error: expected ';' before '}' token
   16 |   cout<<s[0]<<s.size()-2<<s[s.size()-1]
      |                                        ^
      |                                        ;
   17 | }
      | ~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void) {
	string in;
	cin >> in;
	cout << in[0] << in.size() - 2 << in[in.size];
	cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:45: error: invalid use of non-static member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
    7 |         cout << in[0] << in.size() - 2 << in[in.size];
      |                                             ^
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:1076:7: note: declared here
 1076 |       size() const _GLIBCXX_NOEXCEPT
      |       ^~~~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
  string s;
  cin>>s;
  s+=to_strng(s.length());
  s+=s(n-1);
  cout<<s<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:6: error: 'to_strng' was not declared in this scope
    8 |   s+=to_strng(s.length());
      |      ^~~~~~~~
a.cc:9:8: error: 'n' was not declared in this scope
    9 |   s+=s(n-1);
      |        ^
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
  string s;
  cin>>s;
  int n=s.length();
  cout<<s(0)++(to_string(n))++s(n-1)<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: no match for call to '(std::string {aka std::__cxx11::basic_string<char>}) (int)'
    9 |   cout<<s(0)++(to_string(n))++s(n-1)<<endl;
      |         ~^~~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
  string s;
  cin>>s;
  int n=s.length;
  cout<<s(0)++(to_string(n))++s(n-1)<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: cannot convert 'std::__cxx11::basic_string<char>::length' from type 'std::__cxx11::basic_string<char>::size_type (std::__cxx11::basic_string<char>::)() const noexcept' {aka 'long unsigned int (std::__cxx11::basic_string<char>::)() const noexcept'} to type 'int'
    8 |   int n=s.length;
      |           ^~~~~~
a.cc:9:10: error: no match for call to '(std::string {aka std::__cxx11::basic_string<char>}) (int)'
    9 |   cout<<s(0)++(to_string(n))++s(n-1)<<endl;
      |         ~^~~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
  string s;
  int n=s.length;
  cin>>s;
  cout<<s(0)++(to_string(n))++s(n-1)<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: cannot convert 'std::__cxx11::basic_string<char>::length' from type 'std::__cxx11::basic_string<char>::size_type (std::__cxx11::basic_string<char>::)() const noexcept' {aka 'long unsigned int (std::__cxx11::basic_string<char>::)() const noexcept'} to type 'int'
    7 |   int n=s.length;
      |           ^~~~~~
a.cc:9:10: error: no match for call to '(std::string {aka std::__cxx11::basic_string<char>}) (int)'
    9 |   cout<<s(0)++(to_string(n))++s(n-1)<<endl;
      |         ~^~~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
  string s;
  cin>>s;
  cout<<s(0)++(to_string(s.length))++(*(s.end()))<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: no match for call to '(std::string {aka std::__cxx11::basic_string<char>}) (int)'
    8 |   cout<<s(0)++(to_string(s.length))++(*(s.end()))<<endl;
      |         ~^~~
a.cc:8:28: error: invalid use of non-static member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
    8 |   cout<<s(0)++(to_string(s.length))++(*(s.end()))<<endl;
      |                          ~~^~~~~~
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:1083:7: note: declared here
 1083 |       length() const _GLIBCXX_NOEXCEPT
      |       ^~~~~~
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
  string s;
  cin>>s;
  cout<<s(0)++(to_string(s.length))++*(s.end())<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: no match for call to '(std::string {aka std::__cxx11::basic_string<char>}) (int)'
    8 |   cout<<s(0)++(to_string(s.length))++*(s.end())<<endl;
      |         ~^~~
a.cc:8:28: error: invalid use of non-static member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
    8 |   cout<<s(0)++(to_string(s.length))++*(s.end())<<endl;
      |                          ~~^~~~~~
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:1083:7: note: declared here
 1083 |       length() const _GLIBCXX_NOEXCEPT
      |       ^~~~~~
Language: C++

    #include <iostream>
    #include <string>
    using namespace std;
    int mian(){
      string s;
       cin >> s;
      int N = s.size();
      cout << s[0]<< N-2<<s[N-1]<<endl;
    }

Compiler output:
a.cc: In function 'int mian()':
a.cc:9:5: warning: no return statement in function returning non-void [-Wreturn-type]
    9 |     }
      |     ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

    #include <iostream>
    #include <string>
    using namespace std;
    mian(){
      string s;
       cin >> s;
      int N = s.length();
      cout << s[0]<< N-2<<s[N-1]<<endl;
    }

Compiler output:
a.cc:4:5: error: ISO C++ forbids declaration of 'mian' with no type [-fpermissive]
    4 |     mian(){
      |     ^~~~
a.cc: In function 'int mian()':
a.cc:9:5: warning: no return statement in function returning non-void [-Wreturn-type]
    9 |     }
      |     ^
Language: C++

#include <iostream>
#include <string>
using namespace std;
int mian(){
  string s;
   cin >> s;
  int N = s.length();
  cout << s[0]<< N-2<<s[N-1]<<endl;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:9:1: warning: no return statement in function returning non-void [-Wreturn-type]
    9 | }
      | ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

include <iostream >
include<string>
using namespace std;
int main(){
        string s;
        cout>>s[0]>>s.size()-2>>s[s.size()-1];
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <iostream >
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:5:9: error: 'string' was not declared in this scope
    5 |         string s;
      |         ^~~~~~
a.cc:6:9: error: 'cout' was not declared in this scope
    6 |         cout>>s[0]>>s.size()-2>>s[s.size()-1];
      |         ^~~~
a.cc:6:15: error: 's' was not declared in this scope
    6 |         cout>>s[0]>>s.size()-2>>s[s.size()-1];
      |               ^
Language: Java

import java.util.*;
public class i18n {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		String str = sc.next();
		char head = str.charAt(0);
		int body = str.length() - 2;
		char leg = str.charAt(body+1);
		System.out.print(head);
		System.out.print(body);
		System.out.println(leg);
	}
}

Compiler output:
Main.java:2: error: class i18n is public, should be declared in a file named i18n.java
public class i18n {
       ^
1 error
Language: C++

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

int main() {
  string s;
  cin >> s;
  int n = s.length(); 
  string x = s[0] + 'n-2' +s[n-1];
    cout << x << endl;
}

Compiler output:
a.cc:8:21: warning: multi-character character constant [-Wmultichar]
    8 |   string x = s[0] + 'n-2' +s[n-1];
      |                     ^~~~~
a.cc: In function 'int main()':
a.cc:8:27: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string x = s[0] + 'n-2' +s[n-1];
Language: C++

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

int main() {
  string s;
  cin >> s;
  int n = s.length(); 
  string x = s[0] + "n-2" +s[n-1] 
    cout << x << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: expected ',' or ';' before 'cout'
    9 |     cout << x << endl;
      |     ^~~~
Language: C++

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

int main() {
  string s;
  cin >> s;
  int n = length(s); 
  string x = s[0] + "n-2" +s[n-1] 
    cout << x << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: 'length' was not declared in this scope
    7 |   int n = length(s);
      |           ^~~~~~
a.cc:9:5: error: expected ',' or ';' before 'cout'
    9 |     cout << x << endl;
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	cin>>s;
	int n=s.size();
	cout<<s[0]ns[n-1]<<endl;
	return 0;
	}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:19: error: expected ';' before 'ns'
    7 |         cout<<s[0]ns[n-1]<<endl;
      |                   ^~
      |                   ;
Language: C++

#include<algorithm>
#include<cmath>
#include<string>
#include<array>
#include<vector>
#include<functional>
#include<unordered_map>
#include<map>
#include<numeric>
#include<limits>
#include<utility>
#include<queue>
#include<random>
using namespace std;

int main(void) {
	int n;
	char a, b;
	string str;
	cin >> str;

	n = str.length() - 2;

	a = str.front();

	b = str.back();

	cout << a << n << b << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:9: error: 'cin' was not declared in this scope
   20 |         cin >> str;
      |         ^~~
a.cc:14:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
   13 | #include<random>
  +++ |+#include <iostream>
   14 | using namespace std;
a.cc:28:9: error: 'cout' was not declared in this scope
   28 |         cout << a << n << b << endl;
      |         ^~~~
a.cc:28:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:28:32: error: 'endl' was not declared in this scope
   28 |         cout << a << n << b << endl;
      |                                ^~~~
a.cc:14:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
   13 | #include<random>
  +++ |+#include <ostream>
   14 | using namespace std;
Language: C++

#include<iostream>
#include<algorithm>
#include<cmath>
#include<string>
#include<array>
#include<vector>
#include<functional>
#include<unordered_map>
#include<map>
#include<numeric>
#include<limits>
#include<utility>
#include<queue>
#include<random>
 
using namespace std;
 
int main(){
char s[100];
  int len;
  
  cin >> s;
  
  len = strlen(s);

  cout << s[0] << len - 2 << s[len - 1] << endl;
  
  return 0;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:9: error: 'strlen' was not declared in this scope
   24 |   len = strlen(s);
      |         ^~~~~~
a.cc:15:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
   14 | #include<random>
  +++ |+#include <cstring>
   15 |