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

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

bool palindromic(int n){
  int digit[5];
  for(int i=0;i<5;i++){
    digit[i] = n%10;
    n /=10;
  }
  if(digit[4] == digit[0] && digit[3] == digit[1]) return true;
  return falase;
}

int main(){
  int a,b,ans=0;
  cin >> a >> b;
  for(int i=a;i<=b;i++){
    if(palindromic(i)) ans++;
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'bool palindromic(int)':
a.cc:11:10: error: 'falase' was not declared in this scope; did you mean 'fclose'?
   11 |   return falase;
      |          ^~~~~~
      |          fclose
Language: C++

#include <iostream>
using namespace std;

int main(){
  int a,b;
  cin >> a >> b;
  int ans=0;
  for(int i=a;i<=b;i++){
    for(j=1;j<10;j++){
      for(k=0;k<10;k++){
        for(l=0;l<10;l++){
          if(i==10001*j+1010*k+100*l){
            ans++;
          }
        }
      }
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'j' was not declared in this scope
    9 |     for(j=1;j<10;j++){
      |         ^
a.cc:10:11: error: 'k' was not declared in this scope
   10 |       for(k=0;k<10;k++){
      |           ^
a.cc:11:13: error: 'l' was not declared in this scope
   11 |         for(l=0;l<10;l++){
      |             ^
Language: C++

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

int main() {
  int a,b,aa,bb,ans;
  cin>>a>>b;
  x=to_string(a);
  aa=(x.at(0)-'0')*10001+(x.at(1)-'0')*1010+(x.at(2)-'0')*100;
  if(aa<a)aa+=100;
  
  y=to_string(b);
  bb=(y.at(0)-'0')*10001+(y.at(1)-'0')*1010+(y.at(2)-'0')*100;
  if(bb>b)bb-=100;
  
  xx=to_string(aa);
  yy=to_string(bb);
  ans=(yy.at(0)*100+yy.at(1)*10+yy.at(2))-(yy.at(0)*100+xx.at(1)*10+xx.at(2))+1;
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'x' was not declared in this scope
    7 |   x=to_string(a);
      |   ^
a.cc:11:3: error: 'y' was not declared in this scope
   11 |   y=to_string(b);
      |   ^
a.cc:15:3: error: 'xx' was not declared in this scope
   15 |   xx=to_string(aa);
      |   ^~
a.cc:16:3: error: 'yy' was not declared in this scope; did you mean 'yn'?
   16 |   yy=to_string(bb);
      |   ^~
      |   yn
Language: C++

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

using namespace std;

int main(){

	int a, b;
	int sum=0;

	sdash=s.substr(0, 3);
	int y=atoi(sdash.c_str());

	cin>> a >> b;

	for(int i=a;i<=b;i++){
		if(i/10000==i%10 && (i/1000)%10==(i%100)/10) sum++;
	}

	cout<< sum << endl;


}
/*
struct xxxx{
	int x;
	int y;
	int num;

	bool operator<(const xxxx &in) const{
		return num<in.num;
	};
};
*/

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: 'sdash' was not declared in this scope
   11 |         sdash=s.substr(0, 3);
      |         ^~~~~
a.cc:11:15: error: 's' was not declared in this scope
   11 |         sdash=s.substr(0, 3);
      |               ^
Language: C++

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

int main() {
  int A,B,num;
  num=0; //numは求める個数
  cin >> A >> B;
  
  for(int j=A ; j<=B ; j++){
    int t=0;
    int M,J;
    M=j;
    J=j;
    for(int i=0 ; i<5 ; i++) {
      t+=(J % 10);
      t*=10;
      J/=10;
    }
    t/=10;
    if(t==M)
     num+=1;
  }

  cout << num << endl;
}
#include <bits/stdc++.h>
using namespace std;

int main() {
  int A,B,num;
  num=0; //numは求める個数
  cin >> A >> B;
  
  for(int j=A ; j<=B ; j++){
    int t=0;
    int M,J;
    M=j;
    J=j;
    for(int i=0 ; i<5 ; i++) {
      t+=(J % 10);
      t*=10;
      J/=10;
    }
    t/=10;
    if(t==M)
     num+=1;
  }

  cout << num << endl;
}


Compiler output:
a.cc:29:5: error: redefinition of 'int main()'
   29 | int main() {
      |     ^~~~
a.cc:4:5: note: 'int main()' previously defined here
    4 | int main() {
      |     ^~~~
Language: C++

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

int main(){
  int A. B;
  cin >> A >> B;
  int count = 0;
  for(int i=A;i<=B;i++){
    a = i%10;
    b = (i/10)%10;
    c = (i/100)%10;
    d = (i/1000)%10;
    e = (i/100000)%10;
    if(a == e && b == d){
      count += 1;
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incude; did you mean #include?
    1 | #incude<bits/stdc++.h>
      |  ^~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:5:8: error: expected initializer before '.' token
    5 |   int A. B;
      |        ^
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> A >> B;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incude<bits/stdc++.h>
a.cc:6:10: error: 'A' was not declared in this scope
    6 |   cin >> A >> B;
      |          ^
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B;
      |               ^
a.cc:9:5: error: 'a' was not declared in this scope
    9 |     a = i%10;
      |     ^
a.cc:10:5: error: 'b' was not declared in this scope
   10 |     b = (i/10)%10;
      |     ^
a.cc:11:5: error: 'c' was not declared in this scope
   11 |     c = (i/100)%10;
      |     ^
a.cc:12:5: error: 'd' was not declared in this scope
   12 |     d = (i/1000)%10;
      |     ^
a.cc:13:5: error: 'e' was not declared in this scope
   13 |     e = (i/100000)%10;
      |     ^
a.cc:18:3: error: 'cout' was not declared in this scope
   18 |   cout << count << endl;
      |   ^~~~
a.cc:18:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:18:20: error: 'endl' was not declared in this scope
   18 |   cout << count << endl;
      |                    ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #incude<bits/stdc++.h>
Language: C++

a, b = map(int, input().split())
cnt = 0 
for i in range(a, b+1):
  i = str(i)
  if i[0] == i[4] and i[1] == i[3]:
    cnt += 1
print(cnt)

Compiler output:
a.cc:1:1: error: 'a' does not name a type
    1 | a, b = map(int, input().split())
      | ^
Language: C

#include <stdio.h>
int main(){
  int A, B, a, count=0;
  int c[5];
  scanf("%d%d", &A, &B);
  for (; A<B+1 ;A++){
    a = A;
    for (int i=0; i<5; i++){
      c[i]=a%10;
      a/=10;
    }
    if (c[0]==c[4] && c[1]==c[3]){
      count++
    }
  }
  printf("%d",count);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:14: error: expected ';' before '}' token
   13 |       count++
      |              ^
      |              ;
   14 |     }
      |     ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A, B, x1, x2, x3, x4, x5, k=0;
  cin >> A >> B;
  for (int i = A; i < B + 1; i++) {
    x1 = i/10000;
    x2 = i/1000 - 10*x1;
    x3 = i/100 - 10*x2 - 100*x1;
    x4 = i/10 - 10*x3 - 100*x2 - 1000*x1
    x5 = i%10
     if ((x1 == x5) && (x2 == x4)) {
       k++;
     }
  }
  
  cout << k << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:41: error: expected ';' before 'x5'
   11 |     x4 = i/10 - 10*x3 - 100*x2 - 1000*x1
      |                                         ^
      |                                         ;
   12 |     x5 = i%10
      |     ~~
Language: C++

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

using namespace std;

#define REP(a, i, n) for (int i = a; i < n; ++i)

bool isPalindromic(string s) {
    string t = s;
    reverse(t.begin(), t.end());
    return s == t;
}

int main() {
    int A, B;
    scanf("%d %d", &A, &B);

    int ans = 0;
    REP(A, i, B + 1) {
        if (isPalindromic(to_string(i))) {
            ans++;
        }
    }

    printf("%d\n", ans);

    return 0;
}


Compiler output:
a.cc: In function 'bool isPalindromic(std::string)':
a.cc:10:5: error: 'reverse' was not declared in this scope
   10 |     reverse(t.begin(), t.end());
      |     ^~~~~~~
Language: C++

#include<bits/stdc++.h>

using namespace std;

int main()
{
    int a,b;

    cin >> a >> b;

    int cnt = 0;
    for(int i = a;i <= b;i++){
        string str = to_string(i);
        string test = str;
        reverse(str.begin,str.end);
        if(str == test) cnt++;   
    }
    cout << cnt << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:16: error: no matching function for call to 'reverse(<unresolved overloaded function type>, <unresolved overloaded function type>)'
   15 |         reverse(str.begin,str.end);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:1083:5: note: candidate: 'template<class _BIter> void std::reverse(_BIter, _BIter)'
 1083 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |     ^~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1083:5: note:   template argument deduction/substitution failed:
a.cc:15:16: note:   couldn't deduce template parameter '_BIter'
   15 |         reverse(str.begin,str.end);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note: candidate: 'template<class _ExecutionPolicy, class _BidirectionalIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::reverse(_ExecutionPolicy&&, _BidirectionalIterator, _BidirectionalIterator)'
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note:   candidate expects 3 arguments, 2 provided
Language: C++

//file_name:ABC90_B.cpp
#include <bits/stdc++.h>
#define fi first
#define se second
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define rng(a) a.begin(),a.end()
#define maxs(x,y) (x = max(x,y))
#define mins(x,y) (x = min(x,y))
#define limit(x,l,r) max(l,min(x,r))
#define lims(x,l,r) (x = max(l,min(x,r)))
#define isin(x,l,r) ((l) <= (x) && (x) < (r))
#define pb push_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcountll
#define uni(x) x.erase(unique(rng(x)),x.end())
#define snuke srand((unsigned)clock()+(unsigned)time(NULL));
#define show(x) cout<<#x<<" = "<<x<<endl;
#define PQ(T) priority_queue<T,v(T),greater<T> >
#define bn(x) ((1<<x)-1)
#define dup(x,y) (((x)+(y)-1)/(y))
#define newline puts("")
#define v(T) vector<T>
#define vv(T) v(v(T))
using namespace std;
typedef long long int ll;
typedef unsigned uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<P> vp;
inline int in() { int x; scanf("%d",&x); return x;}
template<typename T>inline istream& operator>>(istream&i,v(T)&v)
{rep(j,sz(v))i>>v[j];return i;}
template<typename T>string join(const v(T)&v)
{stringstream s;rep(i,sz(v))s<<' '<<v[i];return s.str().substr(1);}
template<typename T>inline ostream& operator<<(ostream&o,const v(T)&v)
{if(sz(v))o<<join(v);return o;}
template<typename T1,typename T2>inline istream& operator>>(istream&i,pair<T1,T2>&v)
{return i>>v.fi>>v.se;}
template<typename T1,typename T2>inline ostream& operator<<(ostream&o,const pair<T1,T2>&v)
{return o<<v.fi<<","<<v.se;}
template<typename T>inline ll suma(const v(T)& a) { ll res(0); for (auto&& x : a) res += x; return res;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
#define dame { puts("-1"); return 0;}
#define yn {puts("Yes");}else{puts("No");}
const int MX = 200005;

    // int scan
    /*
    int x;
    scanf("%d",&x);
    int y;
    scanf("%d",&y);
    int z;
    scanf("%d",&z);

    // matrix scan
    /*
    ll a[n] = {};
    rep(i,n){
        scanf("%lld",&a[i]);
    }
    */

    // string scan
    /*
    string s;
    cin >> s;
    */


int main() {
    int n,m;
    scanf("%d%d",&n,&d);

    int l[100010] = {};
    
    srep(i,10000,100000){
        int ii = i;
        int a,b,c,d,e;
        a = ii%10;
        ii /= 10;
        b = ii%10;
        ii /= 10;
        c = ii%10;
        ii /= 10;
        d = ii%10;
        ii /= 10;
        e = ii%10;
        ii /= 10;
        if(a==e&&b==d)l[i]=1;
    }
    int nn = 0;
    int mm = 0;
    rep(i,n+1){
        nn += l[i];
    }
    rep(i,m+1){
        mm += l[i];
    }

    cout << mm - nn << endl;
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:81:22: error: 'd' was not declared in this scope
   81 |     scanf("%d%d",&n,&d);
      |                      ^
Language: C++

#include<bits>#include <bits/stdc++.h>
using namespace std;
bool is_palindromic(int n)
{
    int p[5];
    for (int i = 0; i < 5; i++)
    {
        p[i] = n % 10;
        n /= 10;
    }
    return (p[0] == p[4] && p[1] == p[3]);
}
int main()
{
    int a, b, ans = 0;
    cin >> a >> b;
    for (int i = a; i <= b; i++)
    {
        if (is_palindromic(i))
            ans++;
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc:1:15: warning: extra tokens at end of #include directive
    1 | #include<bits>#include <bits/stdc++.h>
      |               ^
a.cc:1:9: fatal error: bits: No such file or directory
    1 | #include<bits>#include <bits/stdc++.h>
      |         ^~~~~~
compilation terminated.
Language: C++

#include <iostream>
using namespace std;

bool pal(x){
  int a,b,c,d,e;
  a = x%10; x /= 10;
  b = x%10; x /= 10;
  c = x%10; x /= 10;
  d = x%10; x /= 10;
  e = x%10; x /= 10;
  if(a != e)
    return false;
  else if(b != d)
    return false;
  else
    return true;
}

int main(){
  int A,B; cin>>A>>B;
  int count = 0;
  for(int i=A; i <= B; i++){
    if(pal(i))
      count++;
  }
  cout<<count<<endl;
}

Compiler output:
a.cc:4:10: error: 'x' was not declared in this scope
    4 | bool pal(x){
      |          ^
a.cc: In function 'int main()':
a.cc:23:11: error: 'pal' cannot be used as a function
   23 |     if(pal(i))
      |        ~~~^~~
Language: C++

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

int main(){
 int a, b, count=0;
  
  cin >> a >> b;
  for(int i=1; i <= 9; i++){
   for(int j=0; j <=9; j++){
     for(int k=0; k <=9; k++){
      int target  = i * 10001 + j * 1010 + k * 100 ;
       if (target >=a && target < b)
         count++;
     }
    }
  }
  cout << count << endl;
}  
}

Compiler output:
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

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

int main(){
 int a, b, count=0;
  
  cin >> a >> b
  for(int i=1; i <= 9; i++){
   for(int j=0; j <=9; j++){
     for(int k=0; k <=9; k++){
      target  = i * 10001 + j * 1010 + k * 100 ;
       if (target >=a && target < b)
         count++;
    
     }
    }
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:16: error: expected ';' before 'for'
    7 |   cin >> a >> b
      |                ^
      |                ;
    8 |   for(int i=1; i <= 9; i++){
      |   ~~~           
a.cc:8:16: error: 'i' was not declared in this scope
    8 |   for(int i=1; i <= 9; i++){
      |                ^
Language: C++

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

int main(){
 int a, b, count=0;
  
  cin >> a >> b
  for(int i=1; i <= 9; i++;){
   for(int j=0; j <=9; j++;){
     for(int k=0; k <=9; k++;){
      target  = i * 10001 + j * 1010 + k * 100 ;
       if (target >=a && target < b)
         count++;
    
     }
    }
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:16: error: expected ';' before 'for'
    7 |   cin >> a >> b
      |                ^
      |                ;
    8 |   for(int i=1; i <= 9; i++;){
      |   ~~~           
a.cc:8:16: error: 'i' was not declared in this scope
    8 |   for(int i=1; i <= 9; i++;){
      |                ^
a.cc:8:28: error: expected primary-expression before ')' token
    8 |   for(int i=1; i <= 9; i++;){
      |                            ^
Language: C++

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

int main(){
 int a, b, count=0;
  
  cin >> a >> b
  for(int i=1; i <= 9; i++;){
   for(int j=0; j <=9; j++;){
     for(int k=0; k <=9; k++;){
      target  = i * 10001 + j * 1010 + k * 100 ;
       if (target >=a && target < b)
         count++;
     }
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:16: error: expected ';' before 'for'
    7 |   cin >> a >> b
      |                ^
      |                ;
    8 |   for(int i=1; i <= 9; i++;){
      |   ~~~           
a.cc:8:16: error: 'i' was not declared in this scope
    8 |   for(int i=1; i <= 9; i++;){
      |                ^
a.cc:8:28: error: expected primary-expression before ')' token
    8 |   for(int i=1; i <= 9; i++;){
      |                            ^
a.cc:17:2: error: expected '}' at end of input
   17 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main(){
 int a, b, count=0;
  
  cin >> a >> b
  for(int i=1; i <= 9; i++){
   for(int j=0; j <=9; j++){
     for(int k=0; k <=9; k++){
      target  = i * 10001 + j * 1010 + k * 100 ;
       if (target >=a && target < b)
         count++;
     }
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:16: error: expected ';' before 'for'
    7 |   cin >> a >> b
      |                ^
      |                ;
    8 |   for(int i=1; i <= 9; i++){
      |   ~~~           
a.cc:8:16: error: 'i' was not declared in this scope
    8 |   for(int i=1; i <= 9; i++){
      |                ^
a.cc:17:2: error: expected '}' at end of input
   17 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in);) {
            new Main().solve(sc);
        }
    }

    void solve(Scanner sc) {
        int a = sc.nextInt();
        int b = sc.nextInt();
        int count = 0;
        for (int i = a; i <= b; i++) {
            Char[] tmp = String.valueOf(i).toCharArray();
            if (tmp[0] = tmp[4] && tmp[1] == tmp[3]) {
                count++;
            }
        }
        System.out.println(count);
    }
}

Compiler output:
Main.java:15: error: cannot find symbol
            Char[] tmp = String.valueOf(i).toCharArray();
            ^
  symbol:   class Char
  location: class Main
1 error
Language: Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in);) {
            new Main().solve(sc);
        }
    }

    void solve(Scanner sc) {
        int a = sc.nextInt();
        int b = sc.nextInt();
        int count = 0;
        for (int i = a; i <= b; i++) {
            Char[] tmp = String.valueOf(i);
            if (tmp[0] = tmp[4] && tmp[1] == tmp[3]) {
                count++;
            }
        }
        System.out.println(count);
    }
}

Compiler output:
Main.java:15: error: cannot find symbol
            Char[] tmp = String.valueOf(i);
            ^
  symbol:   class Char
  location: class Main
1 error
Language: C++

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

int main(){
  int A,B;
  cin >> A,B;
  int count = 0;
  int i = A
  
  while(i <= B){
    int i1,i2,i3,i4,i5;
    i1 = i%10;
    i2 = (i%100-i%10)/10;
    i3 = (i%1000-i%100)/100;
    i4 = (i%10000-i%1000)/1000;
    i5 = (i%100000-i%10000)/10000;
    if (i1==i5 && i2==i4){
      count++;}
      i++;
  }
    
    cout << count <<endl;
    
  }
  
    

Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: expected ',' or ';' before 'while'
   10 |   while(i <= B){
      |   ^~~~~
Language: C++

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

int main(){
  int A,B;
  cin >> A,B;
  int count = 0;
  
  for (int i; i>=A; i<= B;i++){
    int i1,i2,i3,i4,i5;
    i1 = i%10;
    i2 = (i%100-i%10)/10;
    i3 = (i%1000-i%100)/100;
    i4 = (i%10000-i%1000)/1000;
    i5 = (i%100000-i%10000)/10000;
    if (i1==i5 && i2==i4){
      count++;
    }
  }
    
    cout << count <<endl;
    
  }
  
    

Compiler output:
a.cc: In function 'int main()':
a.cc:9:26: error: expected ')' before ';' token
    9 |   for (int i; i>=A; i<= B;i++){
      |       ~                  ^
      |                          )
a.cc:9:27: error: 'i' was not declared in this scope
    9 |   for (int i; i>=A; i<= B;i++){
      |                           ^
Language: C++

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

int main(){
  int A,B;
  cin >> A,B;
  int count = 0;
  
  for (int i >=A; i <= B;i++){
    int i1,i2,i3,i4,i5;
    i1 = i%10;
    i2 = (i%100-i%10)/10;
    i3 = (i%1000-i%100)/100;
    i4 = (i%10000-i%1000)/1000;
    i5 = (i%100000-i%10000)/10000;
    if (i1==i5 && i2==i4){
      count++;
    }
    
    cout << count <<endl;
    
  }
  
    

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: expected ';' before '>=' token
    9 |   for (int i >=A; i <= B;i++){
      |             ^~~
      |             ;
a.cc:9:14: error: expected primary-expression before '>=' token
    9 |   for (int i >=A; i <= B;i++){
      |              ^~
a.cc:9:25: error: expected ')' before ';' token
    9 |   for (int i >=A; i <= B;i++){
      |       ~                 ^
      |                         )
a.cc:9:26: error: 'i' was not declared in this scope
    9 |   for (int i >=A; i <= B;i++){
      |                          ^
a.cc:22:4: error: expected '}' at end of input
   22 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int A,B,ans;
  cin>>A>>B;
  ans=0;
  for (int i=A;i<=B,i++){
    if (i/10000==i%10 && (i/1000)%10==(i/10)%10)
      ans+=1;
  }
  cout<<ans<<endl;
}
      


Compiler output:
a.cc: In function 'int main()':
a.cc:7:24: error: expected ';' before ')' token
    7 |   for (int i=A;i<=B,i++){
      |                        ^
      |                        ;
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int A,B,ans;
  cin>>A>>B;
  ans=0;
  for (int i=A;i<=B,i++){
    if (i/10000==i%10 && (i/1000)%10==(i/10)%10)
      ans+=1;
  }
}
      

Compiler output:
a.cc: In function 'int main()':
a.cc:7:24: error: expected ';' before ')' token
    7 |   for (int i=A;i<=B,i++){
      |                        ^
      |                        ;
Language: C++

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

int main() {
	int A, B;
	int sum = 0;
	cin >> A >> B;
	for (int i = A; i <= B; i++) {
		if (is_palindromic(i)) sum++;
	}
	cout << sum << endl;
}

bool is_palindromic(int n) {
	int n1, n2, n4, n5;
	n5 = n / 10000;
	n %= 10000;
	n4 = n / 1000;
	n %= 100;
	n2 = n / 10;
	n1 = n % 10;
	if (n1 == n5 && n2 == n4) {
		return true;
	} else {
		return false;
	}
}



Compiler output:
a.cc: In function 'int main()':
a.cc:9:21: error: 'is_palindromic' was not declared in this scope
    9 |                 if (is_palindromic(i)) sum++;
      |                     ^~~~~~~~~~~~~~
Language: C++

#include <stdio.h>
int main(void){
char a[6],b[6],c;
int i,a1,b1,a2,b2,aa,ba
scanf("%s%c%s",a,&c,b);
a1=((int)a[3]-48)*10+(int)a[4]-48;
a2=((int)a[1]-48)*10+(int)a[0]-48;
b1=((int)b[3]-48)*10+(int)b[4]-48;
b2=((int)b[1]-48)*10+(int)b[0]-48;
aa=((int)a[0]-48)*100+((int)a[1]-48)*10+(int)a[2]-48;
aa+=(a1>=a2)? 1:0;
ba=((int)b[0]-48)*100+((int)b[1]-48)*10+(int)b[2]-48;
ba+=(b1>=b2)? 0:-1;
printf("%d",ba-aa+1);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: expected initializer before 'scanf'
    5 | scanf("%s%c%s",a,&c,b);
      | ^~~~~
a.cc:12:1: error: 'ba' was not declared in this scope; did you mean 'aa'?
   12 | ba=((int)b[0]-48)*100+((int)b[1]-48)*10+(int)b[2]-48;
      | ^~
      | aa
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin>>A>>B;
  int sum=0;
  for(int i=A;i<B;i++){
    int s,t,u,v;
    s=i%10;//11111_11110+1
    t=i/10%10;//1111_1110+1
    u=i/1000%10;//111_110
    v=i/10000
    if(s==v&&t==u){
      sum++;
    }
    cout<<sum<<endl;
  }
}
    
      

Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: expected ';' before 'if'
   13 |     v=i/10000
      |              ^
      |              ;
   14 |     if(s==v&&t==u){
      |     ~~
Language: C

#include <stdlib.h>
#include <unistd.h>
#define REP(i, n) for (int i = 0; (i) < (int)(n); ++ (i))

int input() {
    char buf[6];
    int size = read(0, buf, 6);
    int n = 0;
    REP (i, 5) {
        n = n * 10 + buf[i] - '0';
    }
    return n;
}
void output(int n) {
    char buf[20];
    char *s = buf + sizeof buf;
    *(-- s) = '\n';
    if (not n) *(-- s) = '0';
    for (; n; n /= 10) {
        *(-- s) = (n % 10) + '0';
    }
    write(1, s, buf + sizeof buf - s);
}


__attribute__((constructor))
static void _main() {
    int a = input();
    int b = input();
    int cnt = 0;
    REP (x, 10) REP (y, 10) REP (z, 10) {
        int n = x * 10000 + y * 1000 + z * 100 + y * 10 + x;
        cnt += (a <= n and n <= b);
    }
    output(cnt);
    _exit(EXIT_SUCCESS);
}

int main() {
}


Compiler output:
main.c: In function 'output':
main.c:18:9: error: 'not' undeclared (first use in this function)
   18 |     if (not n) *(-- s) = '0';
      |         ^~~
main.c:18:9: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:12: error: expected ')' before 'n'
   18 |     if (not n) *(-- s) = '0';
      |        ~   ^~
      |            )
main.c: In function '_main':
main.c:33:23: error: expected ')' before 'and'
   33 |         cnt += (a <= n and n <= b);
      |                ~      ^~~~
      |                       )
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    String A = sc.next();
    int start = Integer.parseInt(A);
    String B = sc.next();
    int end = Integer.parseInt(B);
    int count = 0;
    
    for(int i = start; i <= end; i++){
      string judge = Integer.toString(i);
      if(judge.charAt(0) == judge.charAt(4) && judge.charAt(1) == judge.charAt(3)){
        count++;
      }
    }
    
    System.out.println(count);
  }
}

      

Compiler output:
Main.java:15: error: cannot find symbol
      string judge = Integer.toString(i);
      ^
  symbol:   class string
  location: class Main
1 error
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    String A = sc.next();
    int start = Integer.parseInt(A);
    String B = sc.next();
    int end = Integer.parseInt(B);
    int count = 0;
    
    for(int i = start; i <= end; i++){
      string judge = i.toString();
      if(judge.charAt(0) == judge.charAt(4) && judge.charAt(1) == judge.charAt(3)){
        count++;
      }
    }
    
    System.out.println(count);
  }
}

      

Compiler output:
Main.java:15: error: cannot find symbol
      string judge = i.toString();
      ^
  symbol:   class string
  location: class Main
Main.java:15: error: int cannot be dereferenced
      string judge = i.toString();
                      ^
2 errors
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    string A = sc.next();
    int start = Integer.parseInt(A);
    string B = sc.next();
    int end = Integer.parseInt(B);
    int count = 0;
    
    for(int i = start; i <= end; i++){
      string judge = i.tostring();
      if(judge.charAt(0) == judge.charAt(4) && judge.charAt(1) == judge.charAt(3)){
        count++;
      }
    }
    
    System.out.println(count);
  }
}

      

Compiler output:
Main.java:8: error: cannot find symbol
    string A = sc.next();
    ^
  symbol:   class string
  location: class Main
Main.java:10: error: cannot find symbol
    string B = sc.next();
    ^
  symbol:   class string
  location: class Main
Main.java:15: error: cannot find symbol
      string judge = i.tostring();
      ^
  symbol:   class string
  location: class Main
Main.java:15: error: int cannot be dereferenced
      string judge = i.tostring();
                      ^
4 errors
Language: C++

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

int main(){
  int a,b;cin>>a>>b;
  int r=0;
  for(int i=a;i<=b;i++){
    int s=i%10,t=i/10000%10;
    int u=i/10%10,v=i?1000%10;
    if(s==t&c==v)r++;
  }
  cout<<r<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:30: error: expected ':' before ';' token
   10 |     int u=i/10%10,v=i?1000%10;
      |                              ^
      |                              :
a.cc:10:30: error: expected primary-expression before ';' token
a.cc:11:13: error: 'c' was not declared in this scope
   11 |     if(s==t&c==v)r++;
      |             ^
Language: C++

#include <iostream>
using namespace std;

int main() {
	int A, B;
	cin >> A >> B;
	
	int ans = 0;
	for (int i = A; i < B; i++) {
		int s = i % 10, int t = i / 10000;
		int u = i / 10 % 10, int v = i / 1000 % 10;

		if (s == t && u == v) {
			ans++;
		} 
	}

	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:33: error: expected unqualified-id before 'int'
   10 |                 int s = i % 10, int t = i / 10000;
      |                                 ^~~
a.cc:11:38: error: expected unqualified-id before 'int'
   11 |                 int u = i / 10 % 10, int v = i / 1000 % 10;
      |                                      ^~~
a.cc:13:26: error: 't' was not declared in this scope
   13 |                 if (s == t && u == v) {
      |                          ^
a.cc:13:36: error: 'v' was not declared in this scope
   13 |                 if (s == t && u == v) {
      |                                    ^
Language: C++

#include <iostream>
using namespace std;

int main() {
	int A, B;
	cin >> A >> B;
	
	int ans = 0;
	for (int i = A; i < B; i++) {
		int s = i % 10, int t = i / 10000;
		int u = i / 10 % 10, int v = i / 1000 % 10;

		if (s == t && u == v) {
			ans++;
		} 

		i++;
	}

	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:33: error: expected unqualified-id before 'int'
   10 |                 int s = i % 10, int t = i / 10000;
      |                                 ^~~
a.cc:11:38: error: expected unqualified-id before 'int'
   11 |                 int u = i / 10 % 10, int v = i / 1000 % 10;
      |                                      ^~~
a.cc:13:26: error: 't' was not declared in this scope
   13 |                 if (s == t && u == v) {
      |                          ^
a.cc:13:36: error: 'v' was not declared in this scope
   13 |                 if (s == t && u == v) {
      |                                    ^
Language: Java

import scala.io.StdIn

object B090 extends App {
  val Array(n, m) = StdIn.readLine.split(" ").map(_.toInt)

  val ans = (n to m).count(i => {
    val s = i.toString
    s == s.reverse
  })

  println(ans)
}


Compiler output:
Main.java:1: error: ';' expected
import scala.io.StdIn
                     ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int A, B;
  cin >> A >> B;
  for (int i = A; i <= B, i++){
    int e = i % 10;
    int d = i % 100 - e;
    int c = i % 100 - i % 10;
    int b = i % 1000 - i % 100;
    int a = i - i % 1000;
    
    int cnt = 0;
    if(a == e && b == d)
      cnt++
  }
  cout << i << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:30: error: expected ';' before ')' token
    6 |   for (int i = A; i <= B, i++){
      |                              ^
      |                              ;
a.cc:15:12: error: expected ';' before '}' token
   15 |       cnt++
      |            ^
      |            ;
   16 |   }
      |   ~         
a.cc:17:11: error: 'i' was not declared in this scope
   17 |   cout << i << endl;
      |           ^
Language: C++

#include<iostream>
#include<string>

using namespace std;

int main(void)
{
	int a,b;
	cin >> a >> b;

	int count = 0;

	for(int i=a;i<=b;i++)
	{
		string s;
		s = to_string(i);
		string sr = s;
		reverse(sr.begin(),sr.end());

		if(s==sr)count++;
	}

	cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:17: error: 'reverse' was not declared in this scope
   18 |                 reverse(sr.begin(),sr.end());
      |                 ^~~~~~~
Language: C++

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

bool kaibun(string S) {
  if (S[0] == S[4] && S[1] == S[3])
    return true;
  return false;
}

int main() {
  int A, B;
  cin >> A >> B;
  int ans = 0;
  for (int i = A; i <= B; i++) {
    if(kaibun(str(i))ans++;
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: 'str' was not declared in this scope; did you mean 'std'?
   15 |     if(kaibun(str(i))ans++;
      |               ^~~
      |               std
a.cc:16:3: error: expected primary-expression before '}' token
   16 |   }
      |   ^
a.cc:15:28: error: expected ')' before '}' token
   15 |     if(kaibun(str(i))ans++;
      |       ~                    ^
      |                            )
   16 |   }
      |   ~                         
a.cc:16:3: error: expected primary-expression before '}' token
   16 |   }
      |   ^
Language: C++

a,b=map(str,input().split())
ans=0
for j in range(int(a),int(b)+1,1):
    i=str(j)
    x=i[0]
    y=i[1]
    z=i[3]
    w=i[4]
    if x==w and y==z:
        ans+=1
print(ans)

Compiler output:
a.cc:1:1: error: 'a' does not name a type
    1 | a,b=map(str,input().split())
      | ^
Language: C++

#include<iostream>
using namespace std;
int main(){
  int A, B, S;
  S = 0;
  cin >> A >> B;
  for(int i = A; i <= B; i++){
    if(((i/10000)==(i%10)) && (((i/1000)%10)==((i/10)&10)){
      S += 1;
    }
  }
  cout << S << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:59: error: expected ')' before '{' token
    8 |     if(((i/10000)==(i%10)) && (((i/1000)%10)==((i/10)&10)){
      |       ~                                                   ^
      |                                                           )
a.cc:11:3: error: expected primary-expression before '}' token
   11 |   }
      |   ^
Language: C++

#include<bits/stdc++.h>
#include<string>
using namespace std;
int a, b;
int main(){
  cin >> a >> b;
  for(int i = a; i <= b; i++){
    if(i[0] == i[4] && i[1] == i[3]){
      cout << i << endl;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: invalid types 'int[int]' for array subscript
    8 |     if(i[0] == i[4] && i[1] == i[3]){
      |         ^
a.cc:8:17: error: invalid types 'int[int]' for array subscript
    8 |     if(i[0] == i[4] && i[1] == i[3]){
      |                 ^
a.cc:8:25: error: invalid types 'int[int]' for array subscript
    8 |     if(i[0] == i[4] && i[1] == i[3]){
      |                         ^
a.cc:8:33: error: invalid types 'int[int]' for array subscript
    8 |     if(i[0] == i[4] && i[1] == i[3]){
      |                                 ^
Language: C++

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

int main() {
  int A,B;
  cin >> A >> B;
  int C = 0;
  
  for (int i = A; i <= B; i++) {
    if(X%100000/10000==X%10 && X%10000/1000==X%100/10) {
      C++;
    }
  }
  cout << C << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:8: error: 'X' was not declared in this scope
   10 |     if(X%100000/10000==X%10 && X%10000/1000==X%100/10) {
      |        ^
Language: C++

#include<iostream>
using namespace std;
int main() {
	int A, B;
	cin >> A >> B;
	int ans = 0;

	for (i = A; i <= B; i++) {
		int a, b, c, d;
		a = i / 10000;
		b = i / 1000 % 10;
		c = i % 100 / 10;
		d = i % 10;
		if (a == d && b == c) {
			ans++;
		}
	}
	cout << ans << andl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'i' was not declared in this scope
    8 |         for (i = A; i <= B; i++) {
      |              ^
a.cc:18:24: error: 'andl' was not declared in this scope
   18 |         cout << ans << andl;
      |                        ^~~~
Language: C++

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

int main() {
  int A,B,c,n;
  int i = 0;
  cin >> A >> B;
  for(n = A; n <= B; n++){
    while(i < 5){
      int a_i = n%10;
      n = (n-a_i)/10;
      i++;
    }
  c += (a_0 == a_4)*(a_1 == a_3);
  }
  cout << c << endl;
}
    
    

Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'a_0' was not declared in this scope
   14 |   c += (a_0 == a_4)*(a_1 == a_3);
      |         ^~~
a.cc:14:16: error: 'a_4' was not declared in this scope
   14 |   c += (a_0 == a_4)*(a_1 == a_3);
      |                ^~~
a.cc:14:22: error: 'a_1' was not declared in this scope
   14 |   c += (a_0 == a_4)*(a_1 == a_3);
      |                      ^~~
a.cc:14:29: error: 'a_3' was not declared in this scope
   14 |   c += (a_0 == a_4)*(a_1 == a_3);
      |                             ^~~
Language: C++

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

int main() {
  int a_0,a_1,a_2,a_3,a_4,A,B,c,n;
  int i = 0;
  cin >> A >> B;
  for(n = A; n <= B; n++){
    while(i < 5){
      a_i = n%10;
      n = (n-a_i)/10;
      i++;
    }
  c += (a_0 == a_4)*(a_1 == a_3);
  }
  cout << c << endl;
}
    
    

Compiler output:
a.cc: In function 'int main()':
a.cc:10:7: error: 'a_i' was not declared in this scope; did you mean 'a_4'?
   10 |       a_i = n%10;
      |       ^~~
      |       a_4
Language: C++

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

int main() {
  int a_0,a_1,a_2,a_3,a_4,A,B,c;
  int i = 0;
  cin >> A >> B;
  for(n = A; n <= B; n++){
    while(i < 5){
      a_i = n%10;
      n = (n-a_i)/10;
      i++;
    }
  c += (a_0 == a_4)*(a_1 == a_3);
  }
  cout << c << endl;
}
    
    

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: 'n' was not declared in this scope
    8 |   for(n = A; n <= B; n++){
      |       ^
a.cc:10:7: error: 'a_i' was not declared in this scope; did you mean 'a_4'?
   10 |       a_i = n%10;
      |       ^~~
      |       a_4
Language: C++

#include <iostream>
using namespace std;

int main(){
  int a,b;
  cin >> a >> b;
  int answer = b / 100 - a / 100 - 1;
  if (a % 10 * 10 + (a - a % 10) / 10 % 10 <= a / 1000){
    answer ++
  }
  if (b % 10 * 10 + (b - b % 10) / 10 % 10 >= b / 1000){
    answer ++
  }
  cout << answer << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: expected ';' before '}' token
    9 |     answer ++
      |              ^
      |              ;
   10 |   }
      |   ~           
a.cc:12:14: error: expected ';' before '}' token
   12 |     answer ++
      |              ^
      |              ;
   13 |   }
      |   ~
Language: C++

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

int main(void) {
  int a, b, ans;
  cin >> a >> b;
  ans = 0
  for (int i = a; i <= b; i++) {
    int head1, head2, tail;
    head1 = i / 10000;
    head2 = i / 1000 - 10 * head1;
    tail = i % 100;
    if (tail == head1 + head2 * 10) {
      ans++;
    }
  }
  
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: expected ';' before 'for'
    7 |   ans = 0
      |          ^
      |          ;
    8 |   for (int i = a; i <= b; i++) {
      |   ~~~     
a.cc:8:19: error: 'i' was not declared in this scope
    8 |   for (int i = a; i <= b; i++) {
      |                   ^
Language: C++

#include <iostream>
using namespace std;
int main(){
  int A,B,s,a[5];
  cin>>A>>B;
  s=0;
  for(int i=A;i<B-A+1;i++){
    k=i;
    for(int j=0;j<5;j++){
      a[j]=k%10;
      k=(k-k%10)/10;
    }
    if(a[0]==a[4] && a[1]==a[3])
      s++;
  }
  cout<<s<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'k' was not declared in this scope
    8 |     k=i;
      |     ^
Language: C++

#include <bits/stdc++>
using namespace std;
int main ()
{
  int A,B,n,i;
  cin >> A >> B;
  n = A;
  i = 0;
  while ( n <= B )
  {
    int a1,a2,a3,a4,a5;
    a1 = n/10000;
    a2 = n/1000-a1*10;
    a3 = n/100-(n/1000)*10;
    a4 = n/10-(n/100)*10;
    a5 = n%10;
    if ( a1==a5 && a2==a4 )
    { i++;}
    n++;
  }
  cout << i << endl;
}
      

Compiler output:
a.cc:1:10: 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 b[100000];
    for(int i=0;i<10000;i++) b[i]=0;
    for(int i=10000;i<100000;i++){
        b[i]=b[i-1];
        if(i[0]==i[4]&&i[1]==i[2]) b[i]+=1;
    }
    int a,c;
    cin>>a>>c;
    cout<<b[c]-b[a]<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: invalid types 'int[int]' for array subscript
    8 |         if(i[0]==i[4]&&i[1]==i[2]) b[i]+=1;
      |             ^
a.cc:8:19: error: invalid types 'int[int]' for array subscript
    8 |         if(i[0]==i[4]&&i[1]==i[2]) b[i]+=1;
      |                   ^
a.cc:8:25: error: invalid types 'int[int]' for array subscript
    8 |         if(i[0]==i[4]&&i[1]==i[2]) b[i]+=1;
      |                         ^
a.cc:8:31: error: invalid types 'int[int]' for array subscript
    8 |         if(i[0]==i[4]&&i[1]==i[2]) b[i]+=1;
      |                               ^
Language: C++

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

int main() {
  int A, B, tmp;
  int o1,o2,o3,o4,o5;
  int sum = 0;
  cin >> A >> B ;
  
  for(int i=A;i=<B;i++){
    tmp = i;

    o1 = tmp / 10000;
    tmp %= 10000;
    
    o2 = tmp / 1000;
    tmp %= 1000;
    
    o3 = tmp / 100;
    tmp %= 100;
    
    o4 = tmp / 10;
    tmp %= 10;

    o5 = tmp;
    
    if(o1==o5&&o2==o4){
        sum++;
//        cout << i << endl;
    }

  }
  cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:17: error: expected primary-expression before '<' token
   10 |   for(int i=A;i=<B;i++){
      |                 ^
Language: C++

#include <iostream>

using namespace std;

int main()
{
  int a, b;
  int res;

  cin >> a >> b;

  for (int i = a; i <= b; i++) {
    int x5 = i % 10;

    int i /= 10;

    int x4 = i % 10;

    int i /= 100;

    int x2 = i % 10;

    int x1 = i / 10;

    if (x0 == x5 && x1 == x4) res++;
  }

  cout << res << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:11: error: expected initializer before '/=' token
   15 |     int i /= 10;
      |           ^~
a.cc:19:11: error: expected initializer before '/=' token
   19 |     int i /= 100;
      |           ^~
a.cc:25:9: error: 'x0' was not declared in this scope; did you mean 'x1'?
   25 |     if (x0 == x5 && x1 == x4) res++;
      |         ^~
      |         x1
Language: C++

            
    int main(void) {
      int a,b;
      std::cin >> a >> b;
     
      int count = 0;
      for (int i = a; i <= b; ++i) {
        std::string s1(std::to_string(i));
        std::string s2 = s1;
        std::reverse(s2.begin(), s2.end());
        if (s1 == s2) {
          count++;
        }
      }
      
      return 0;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:4:12: error: 'cin' is not a member of 'std'
    4 |       std::cin >> a >> b;
      |            ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | 
a.cc:8:14: error: 'string' is not a member of 'std'
    8 |         std::string s1(std::to_string(i));
      |              ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | 
a.cc:9:14: error: 'string' is not a member of 'std'
    9 |         std::string s2 = s1;
      |              ^~~~~~
a.cc:9:14: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
a.cc:10:14: error: 'reverse' is not a member of 'std'
   10 |         std::reverse(s2.begin(), s2.end());
      |              ^~~~~~~
a.cc:10:22: error: 's2' was not declared in this scope
   10 |         std::reverse(s2.begin(), s2.end());
      |                      ^~
a.cc:11:13: error: 's1' was not declared in this scope
   11 |         if (s1 == s2) {
      |             ^~
Language: C++

    #include <iostream>
    #include <algorithm>
            
    int main(void) {
      int a,b;
      std::cin >> a >> b;
     
      int count = 0;
      for (int i = a; i <= b; ++i) {
        std::string s1(std::to_string(i));
        std::string s2(std::reverse(s1.begin(), s1.end()));
        if (s1 == s2) {
          count++;
        }
      }
      
      return 0;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:11:36: error: invalid use of void expression
   11 |         std::string s2(std::reverse(s1.begin(), s1.end()));
      |                        ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include <iostream>
#include <algorithm>
        
int main(void) {
  int a,b;
  std::cin >> a >> b;

  int count = 0;
  for (int i = a; i <= b; ++i) {
    std::string s1(std::to_string(i));
    std::string s2(std::reverse(s1));
    if (s1 == s2) {
      count++;
    }
  }
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:32: error: no matching function for call to 'reverse(std::string&)'
   11 |     std::string s2(std::reverse(s1));
      |                    ~~~~~~~~~~~~^~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:1083:5: note: candidate: 'template<class _BIter> void std::reverse(_BIter, _BIter)'
 1083 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |     ^~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1083:5: note:   candidate expects 2 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note: candidate: 'template<class _ExecutionPolicy, class _BidirectionalIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::reverse(_ExecutionPolicy&&, _BidirectionalIterator, _BidirectionalIterator)'
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note:   candidate expects 3 arguments, 1 provided
Language: C++

#include<stdio.h>
int main(){
int a,b,t[5],i,j,x,k,ans=0;
scanf("%d %d",&a,&b);
for(i=a,i<=b;i++){
x=0;k=i;
for(j=10000;j>0;j/=10){
t[x]=(k-(k%j))/j;
k-=(t[x]*j);
x++;
}
if(t[0]==t[4]&&t[1]==t[3])ans++;
}
printf("%d",ans);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:17: error: expected ';' before ')' token
    5 | for(i=a,i<=b;i++){
      |                 ^
      |                 ;
Language: C++

#include<stdio.h>
int main(){
int a,b,t[5],i,j,x,k,ans=0;
scanf("%d %d",&a,&b);
for(i=a,i<=b;i++){
x=0;k=i;
for(j=10000;j>0;j/=10){
t[x]=(k-(k%j))/j;
k-=(k*j);
x++;
}
if(t[0]==t[4]&&t[1]==t[3])ans++;
}
printf("%d",ans);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:17: error: expected ';' before ')' token
    5 | for(i=a,i<=b;i++){
      |                 ^
      |                 ;