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

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

int main() {
  int A, B;
  cin >> A >> B;
  int n = 0;
  
  for (int i = A; i < B + 1; i++) {
    p = i / 1 % 10;
    q = i / 10 % 10;
    r = i / 100 % 10;
    s = i / 1000 % 10;
    t = i / 10000;
    
    j = 10000*p + 1000*q + 100*r + 10*s + t;
      
    if (i == j)
      n += 1;
    else if (i != j)
      n += 0;
  }   
      cout << n << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'p' was not declared in this scope
   10 |     p = i / 1 % 10;
      |     ^
a.cc:11:5: error: 'q' was not declared in this scope
   11 |     q = i / 10 % 10;
      |     ^
a.cc:12:5: error: 'r' was not declared in this scope
   12 |     r = i / 100 % 10;
      |     ^
a.cc:13:5: error: 's' was not declared in this scope
   13 |     s = i / 1000 % 10;
      |     ^
a.cc:14:5: error: 't' was not declared in this scope
   14 |     t = i / 10000;
      |     ^
a.cc:16:5: error: 'j' was not declared in this scope
   16 |     j = 10000*p + 1000*q + 100*r + 10*s + t;
      |     ^
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  int n = 0;
  
  for (int i = A; i < B + 1; i++) {
    p = i / 1 % 10
    q = i / 10 % 10
    r = i / 100 % 10
    s = i / 1000 % 10
    t = i / 10000
    
    j = 10000*p + 1000*q + 100*r + 10*s + t
      
    if (i == j)
      n += 1;
    else if (i != j)
      n += 0;
  }   
      cout << n << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'p' was not declared in this scope
   10 |     p = i / 1 % 10
      |     ^
a.cc:20:5: error: 'else' without a previous 'if'
   20 |     else if (i != j)
      |     ^~~~
a.cc:20:19: error: 'j' was not declared in this scope
   20 |     else if (i != j)
      |                   ^
Language: C++

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

int main() {
  int x,y;
  cin >> x >> y;
  int a,b,c,d,e;
  int count=0;
  for (int i=x; i<y+1; i++) {
    a = i/10000;
    b = (i-a*10000) / 1000;
    c = (i-a*10000-b*1000) / 100;
    d = (i-a*10000-b*1000-c*100) /10;
    e = i-a*10000-b*1000-c*100-d*10;
    
    i_inv = e*10000 + d*1000 + c*100 + b*10 + a;
    if (i==i_inv) {
      count++;
    }
  }
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: 'i_inv' was not declared in this scope
   16 |     i_inv = e*10000 + d*1000 + c*100 + b*10 + a;
      |     ^~~~~
Language: C++

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

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


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

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

int main(){
	int A,B,count=0;

  	for(int i=A;i<=B;i++){
    	if(i/10000 == i%10 && (i-i/10000)/1000 == (i-i%10)%100/10){
        	count++;
        }
    }
  cout << count;
}


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

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

int main(){
	int A,B,count=0;

  	for(int i=A;i<=B;i++){
    	if(i/10000 == i%10 && i/1000-10*i/10000 == i%100-i%10){
        	count++;
        }
    }
  cout << count;
}

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

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
 
int main() {
  int A,B,,X,count;
  cin>>A,B;
  count=0;
  for(int i=A;i<B;i++){
    if(i/10000*10000+i%10000/1000*1000+i%1000/100*100+i%10000/1000*10+i/10000)count++;
}
  cout<<count<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: expected unqualified-id before ',' token
    6 |   int A,B,,X,count;
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
 
int main() {
  int A,B,X,count;
  cin>>A,B;
  count=0;
  for(int i=A;i<B;i++){
    if(i/10000*10000+i%10000/1000*1000+i%1000/100*100+i%10000/1000*10+i/10000;)count++
}
  cout<<count<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:79: error: expected primary-expression before ')' token
   10 |     if(i/10000*10000+i%10000/1000*1000+i%1000/100*100+i%10000/1000*10+i/10000;)count++
      |                                                                               ^
a.cc:10:87: error: expected ';' before '}' token
   10 |     if(i/10000*10000+i%10000/1000*1000+i%1000/100*100+i%10000/1000*10+i/10000;)count++
      |                                                                                       ^
      |                                                                                       ;
   11 | }
      | ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: expected unqualified-id before ',' token
    6 |   int A,B,,X,count;
      |           ^
a.cc:10:79: error: expected primary-expression before ')' token
   10 |     if(i/10000*10000+i%10000/1000*1000+i%1000/100*100+i%10000/1000*10+i/10000;)count++
      |                                                                               ^
a.cc:10:87: error: expected ';' before '}' token
   10 |     if(i/10000*10000+i%10000/1000*1000+i%1000/100*100+i%10000/1000*10+i/10000;)count++
      |                                                                                       ^
      |                                                                                       ;
   11 | }
      | ~
Language: C++

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

int main() {
  int A,B,count;
  cin>>A>>B;
  count=0;
  for(int X=A;X<=B;X++){
    if(A/10000*10001+A%10000/1000*1010+A%10000%1000/100<=B)count++
  }
  cout<<count<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:67: error: expected ';' before '}' token
    9 |     if(A/10000*10001+A%10000/1000*1010+A%10000%1000/100<=B)count++
      |                                                                   ^
      |                                                                   ;
   10 |   }
      |   ~
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++){
    man = i / 10000;
    sen = i / 1000 - man * 10;
    iti = i % 10;
    juu = (i % 100 - iti) / 10;
    
    if((man == iti) && (sen == juu)){
      count++;
    }
  }
  cout << count << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'man' was not declared in this scope; did you mean 'tan'?
   10 |     man = i / 10000;
      |     ^~~
      |     tan
a.cc:11:5: error: 'sen' was not declared in this scope; did you mean 'sin'?
   11 |     sen = i / 1000 - man * 10;
      |     ^~~
      |     sin
a.cc:12:5: error: 'iti' was not declared in this scope
   12 |     iti = i % 10;
      |     ^~~
a.cc:13:5: error: 'juu' was not declared in this scope
   13 |     juu = (i % 100 - iti) / 10;
      |     ^~~
Language: C++

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

int main() {
  int A, B, a1, a2, a3, a4, a5, i;
  cin >> A >> B;
  
  i=0;
  
  while(A < B){
    a5 = A / 10000;
    a4 = A / 1000 % 10;
    a3 = A / 100 % 10;
    a2 = A / 10 % 10;
    a1 = A % 10
      
      if(a1 == a5 && a2 == a4){
        i += 1;
      }
    A += 1;
  }
  
  cout << i << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:16: error: expected ';' before 'if'
   15 |     a1 = A % 10
      |                ^
      |                ;
   16 | 
   17 |       if(a1 == a5 && a2 == a4){
      |       ~~
Language: C++

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

int main() {
  int A, B, a1, a2, a3, a4, a5,i;
  cin >> A >> B;
  
  i=0;
  
  while(A < B){
    a1 = A % 10;
    a2 = (A % 100 - A % 10) / 10;
    a3 = (A % 1000 - A % 100) / 100;
    a4 = (A % 10000 - A % 1000) / 1000;
    a5 = A / 10000
      
      if(a1 == a5 && a2 == a4){
        i += 1;
      }
    A += 1
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:19: error: expected ';' before 'if'
   15 |     a5 = A / 10000
      |                   ^
      |                   ;
   16 | 
   17 |       if(a1 == a5 && a2 == a4){
      |       ~~           
a.cc:20:11: error: expected ';' before '}' token
   20 |     A += 1
      |           ^
      |           ;
   21 |   }
      |   ~
Language: C++

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

int main() {
  int N, K,C;
  cin >> N >> K;
  C=0;
  
  for(int i=N;i<K+1;i++){
    bool a,b,c;
    b=(i%10==i/10000%10);
    c=(i/10%10==i/1000%10);
    a=(b&&c)
    if(a){
      C++;
    }
  }
  
  cout << C << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:13: error: expected ';' before 'if'
   13 |     a=(b&&c)
      |             ^
      |             ;
   14 |     if(a){
      |     ~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:16:13: error: expected ';' before '}' token
   16 |       ans+=1
      |             ^
      |             ;
   17 |     }
      |     ~
Language: C++

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

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

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

int main(){
  int a,b,ans=0;
  cin >> a >> b;
  for(i=a;i<=b;i++){
    string s=to_string(i);
    if(s[0]==s[4] && s[1]==s[3])ans++;    
  }
  cout << ans << endl;
}

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

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

int main(){

  int a,b
  cin >> a >> b;
  
  if( b-a <= 10000){
    
    cout << (b-a)/100 + 1 << endl;
    
  }
  
  else{
    
    cout << (b-a)/100 << endl;
    
  }
  
}
    
    
    


Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: expected initializer before 'cin'
    7 |   cin >> a >> b;
      |   ^~~
a.cc:9:7: error: 'b' was not declared in this scope
    9 |   if( b-a <= 10000){
      |       ^
Language: C++

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

int main(){

  int a,b
  cin >> a >> b;
  
  if( b-a <= 10000){
    
    cout << (b-a)/100 + 1 << endl;
    
  }
  
  else{
    
    cout << (b-a)/100 << endl;
    
  }
  
}
    
    
    

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

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

int main(){
  int x, y;
  cin >> x >> y;
  int res = 0;
  
  for(int i = x; i<=y){
    int n = i;
    int a = n % 10;
    n /= 10;
    int b = n % 10;
    n /= 10;
    int c = n % 10;
    n /= 10;
    int d = n % 10;
    n /= 10;
    int e = n % 10;
    if(a == e && b ==d)
      res++;
  }
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:22: error: expected ';' before ')' token
    9 |   for(int i = x; i<=y){
      |                      ^
      |                      ;
Language: C++

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

int main(){
  int x, y;
  cin >> x >> y;
  int res = 0;
  
  for(int i = x; i<=y){
    int n = i;
    int a = n % 10;
    n /= 10;
    int b = n % 10;
    n /= 10;
    int c = n % 10;
    n /= 10;
    int d = n % 10;
    n /= 10;
    int e = n % 10;
    if(a == e && b ==d)
      res++;
  }
  cout << res << endl;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inlcude; did you mean #include?
    1 | #inlcude<bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> x >> y;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #inlcude<bits/stdc++.h>
a.cc:9:22: error: expected ';' before ')' token
    9 |   for(int i = x; i<=y){
      |                      ^
      |                      ;
a.cc:23:3: error: 'cout' was not declared in this scope
   23 |   cout << res << endl;
      |   ^~~~
a.cc:23:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:23:18: error: 'endl' was not declared in this scope
   23 |   cout << res << endl;
      |                  ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #inlcude<bits/stdc++.h>
Language: C++

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

            int main() {
              int A, B, cnt;
              int tmp[99999];
                
              cin >> A >> B;
              
              for(i = A; i < B; i++){
                j = 0;
                while(A > 0){
                  A = A / 10;
                  tmp[j] = A % 10;
                  j++;
                }
                if(tmp[0] == tmp[1] && tmp[3] == tmp[4]) cnt++;
              }
              cout << cnt << endl;
            }


Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: 'i' was not declared in this scope
   10 |               for(i = A; i < B; i++){
      |                   ^
a.cc:11:17: error: 'j' was not declared in this scope
   11 |                 j = 0;
      |                 ^
Language: C++

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

            int main() {
              int A, B, cnt;
              int tmp[99999]
                
              cin >> A >> B;
              
              for(i = A; i < B; i++){
                j = 0
                while(A > 0){
                  A = A / 10;
                  tmp[j] = A % 10;
                  j++;
                }
                if(tmp[0] == tmp[1] && tmp[3] == tmp[4]) cnt++;
              }
              cout << cnt << endl;
            }


Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: expected initializer before 'cin'
    8 |               cin >> A >> B;
      |               ^~~
a.cc:10:19: error: 'i' was not declared in this scope
   10 |               for(i = A; i < B; i++){
      |                   ^
a.cc:11:17: error: 'j' was not declared in this scope
   11 |                 j = 0
      |                 ^
a.cc:17:20: error: 'tmp' was not declared in this scope; did you mean 'tm'?
   17 |                 if(tmp[0] == tmp[1] && tmp[3] == tmp[4]) cnt++;
      |                    ^~~
      |                    tm
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(void){
	int a,b;
  int c = 0;
  cin >> a >> b;
  for(int i = a; a <= b; i++){
    	int s = a % 10,int t = a / 10 % 10;
    	int g = a / 1000 % 10,int h = a / 10000 % 10;
    	if(s == t && g == h){
          	c++;
        }
  }
  cout << c << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: expected unqualified-id before 'int'
    8 |         int s = a % 10,int t = a / 10 % 10;
      |                        ^~~
a.cc:9:31: error: expected unqualified-id before 'int'
    9 |         int g = a / 1000 % 10,int h = a / 10000 % 10;
      |                               ^~~
a.cc:10:17: error: 't' was not declared in this scope
   10 |         if(s == t && g == h){
      |                 ^
a.cc:10:27: error: 'h' was not declared in this scope
   10 |         if(s == t && g == h){
      |                           ^
Language: C++

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

int main() {

  int A, B, number;
  cin >> A >> B;
  number = 0;

  for(int i = A; i <= B; i++){

  if(i % 10 == i / 10000 % 10 && i / 1000 % 10 == i / 10 % 10)
    number += 1;

  }   

Compiler output:
a.cc: In function 'int main()':
a.cc:15:4: error: expected '}' at end of input
   15 |   }
      |    ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A, B;
  cin >> A >> B;
  
  double a=A,b=B;
  
  int flag=0;
  
  while(a<b){
    if( int(a/10000) == int(a)%10 && int(a/1000)%10 == int(a/10)%10 ){
      flag=1;
      break;
    }
    a++;
  }
  
  while(a<b){
    if( int(b/10000) == int(b)%10 && int(b/1000)%10 == int(b/10)%10 ){
      flag=1;
      break;
    }
    b--;
  }
  
  int ans=0;
  if( (a-b+flag)!=0 ){
    ans=ceil((b-a+)/100)+1;
  }
  
    
  //cout<< a <<endl<< b <<endl;
  cout<< ans <<endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:19: error: expected primary-expression before ')' token
   30 |     ans=ceil((b-a+)/100)+1;
      |                   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 cout<<1
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: expected ';' before '}' token
    5 |  cout<<1
      |         ^
      |         ;
    6 | }
      | ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll INF = 1e16;
const ll mod = 1000000007;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

template<class T> inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template<class T> inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
int ctoi(char c) {
  if (c >= '0' && c <= '9') {
    return c - '0';
  }
  return 0;
}
ll factorial(ll n) {
  if (n == 1) {
    return 1;
  }
  ll ans = factorial(n-1);
  return ans*n;
}
ll gcd(ll a, ll b) {
  if (b == 0) return a;
  return gcd(b, a%b);
}
ll lcm(ll a, ll b) {
  return (a/gcd(a, b))*b;
}
bool is_prime(ll n) {
  for (ll i = 2; i*i <= n; i++) {
    if (n%i == 0) return false;
  }
  return n != 1;
}
ll mod_pow(ll x, ll n, ll mod) {
  if (n == 0) return 1;
  ll res = mod_pow(x*x%mod, n/2, mod);
  if (n & 1) res = res * x % mod;
  return res;
}

int main() {
  ll n, m;
  cin >> n >> m;
  ll res = 0;
  for (ll i = n, i <= m; i++) {
    string s = to_string(i);
    bool flag = 1;
    rep(i, 5) {
      if (s.at(i) != s.at(4-i)) flag = 0;
    }
    if (flag) res++;
  }
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:59:19: error: expected ';' before '<=' token
   59 |   for (ll i = n, i <= m; i++) {
      |                   ^~~
      |                   ;
a.cc:59:20: error: expected primary-expression before '<=' token
   59 |   for (ll i = n, i <= m; i++) {
      |                    ^~
Language: C++

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

int main() {
  int A,B,X,x1,x2,x4,x5,Ans;
  cin >> A >> B;
  Ans=0;
  for (int i=0; i=<B-A; i++){
    X = A+i;
    x1= X%10;
    X/=10;
    x2= X%10;
    X/=100;
    x4= X%10;
    X/=10;
    x5= X%10;
    X/=10;
    if(x1==x5 && x2==x4){
    Ans+=1;
    }
  }
  cout << Ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: expected primary-expression before '<' token
    8 |   for (int i=0; i=<B-A; i++){
      |                   ^
Language: C++

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

int main(){
  int A, B;
  cin >> A >> B;
  int sum = B - A + 1;
  int count = 0;
  for(int i = 0; i < sum; i++){
    int n1 = (A + i) % 10;
    int n10 = (A + i) % 100;
    int n100 = (A + i) % 1000;
    int n1000 = (A + i) % 10000;
    int n2 = n10 / 10;
    int n3 = n100 / 100;
    int n4 = n1000 / 1000;
    int n5 = (A + i - n1000 * 1000 - n100 * 100 - n10 * 10 - n1) / 10000;
    if(n1 == n5){
      if(n2 == n4){
        count++
      }
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:16: error: expected ';' before '}' token
   20 |         count++
      |                ^
      |                ;
   21 |       }
      |       ~
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;
 
int main() {
  int A, B, ans;
  cin >> A >> B;
  
  rep(i, B - A) {
    string strNum = to_string(A+i);
    rep(j, strNum.size()/2) {
      if(strNum[j] == strNum[strNum.size()-1-j]) {
        if (j == strNum.size()/2-1) ans++;
      else break;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:2: error: expected '}' at end of input
   18 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

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

int main(){
  int a,b,at=0;
  cin>>a>>b;
  for(int i=a;i<=b;i++){
    if(i/10000==i%10&&(i/10%10==i/1000%10){
      at++;
    }
  }
  cout<<at<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:43: error: expected ')' before '{' token
    8 |     if(i/10000==i%10&&(i/10%10==i/1000%10){
      |       ~                                   ^
      |                                           )
a.cc:11:3: error: expected primary-expression before '}' token
   11 |   }
      |   ^
Language: C++

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

int main(){
  int a,b,at=0;
  cin>>a>>b;
  for(int i=a;i<=b;i++){
    if(i/10000==i%10&&i/1000==i%100){
      at++;
    }
  }
  cout<<at<<endl;
  


Compiler output:
a.cc: In function 'int main()':
a.cc:12:18: error: expected '}' at end of input
   12 |   cout<<at<<endl;
      |                  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

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

	int ans = 0;
	for(int i = 1; i <= 9; i++){
		for(int j = 0; j <= 9; j++){
			for(int k = 0; k <= 9; k++){
				if(a <= 10001*a + 1010*b + 100*c && 10001*a + 1010*b + 100*c <= b)
					ans++;
			}
		}
	}
	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:64: error: 'c' was not declared in this scope
   13 |                                 if(a <= 10001*a + 1010*b + 100*c && 10001*a + 1010*b + 100*c <= b)
      |                                                                ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A,B;
  int count = 0;
  cin >> A >> B;
  for(int i = A; i < B + 1; i++){
    int r1 = i / 10000;
    int r2 = i / 1000;
    int r3 = (i % 100) / 10;
    int r4 = i % 10;
    if(r1 = r4 and r2 = r3){
      count += 1;
      continue;
    }
  }
  cout << count << endl;
}




Compiler output:
a.cc: In function 'int main()':
a.cc:12:16: error: lvalue required as left operand of assignment
   12 |     if(r1 = r4 and r2 = r3){
      |             ~~~^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A,B;
  int count = 0;
  cin >> A >> B;
  for(int i = A; i < B + 1; i++){
    int r1 = i / 10000;
    int r2 = i / 1000;
    int r3 = (i % 100) / 10;
    int r4 = i % 10;
    if(r1 = r4 && r2 = r3){
      count += 1;
      continue;
    }
  }
  cout << count << endl;
}




Compiler output:
a.cc: In function 'int main()':
a.cc:12:16: error: lvalue required as left operand of assignment
   12 |     if(r1 = r4 && r2 = r3){
      |             ~~~^~~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: expected primary-expression before '/' token
    8 |       if(i%10000)/1000 == (i/10)%10){
      |                  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a,b,sum = 0;
  cin >> a >> b;
  int (int i = a,i<=b;i++){
    if(i/10000 == i%10 && (i/10)/1000 == (i/10)%10){
      sum++;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:18: error: 'i' was not declared in this scope
    6 |   int (int i = a,i<=b;i++){
      |                  ^
a.cc:6:3: error: expected primary-expression before 'int'
    6 |   int (int i = a,i<=b;i++){
      |   ^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a,b,sum = 0;
  cin >> a >> b;
  int (int i = a,i<=b;i++){
    bool c = (i/10000 == i%10);
    bool d = ((i/10)/1000 == (i/10)%10);
    if(c==d){
      sum++;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:18: error: 'i' was not declared in this scope
    6 |   int (int i = a,i<=b;i++){
      |                  ^
a.cc:6:3: error: expected primary-expression before 'int'
    6 |   int (int i = a,i<=b;i++){
      |   ^~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:52: error: expected primary-expression before ')' token
    8 |     if(i%10 == i/10000 && (i/10)%10 == (i/10)/1000)){
      |                                                    ^
a.cc: At global scope:
a.cc:13:5: error: 'cout' does not name a type
   13 |     cout << num <<endl;
      |     ^~~~
a.cc:14:1: error: expected declaration before '}' token
   14 | }
      | ^
Language: C++

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

Compiler output:
a.cc:13:5: error: 'cout' does not name a type
   13 |     cout << num <<endl;
      |     ^~~~
a.cc:14:1: error: expected declaration before '}' token
   14 | }
      | ^
Language: C++

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

int main(){
  int A, B;     //開始と終了
  int X, Y;     //Xは逆の数
  int K = 0;    //回文数

  cin >> A >> B;
  
  for ( int i=A; i<=B; i++ ){
    for ( int j=0; j<5; j++ ){
      Y = i % 10; 
      X = X * 10 + y;
    ;
    if ( i == X ) {
      K++
    }
  }
  
  cout << K << endl;
}     

Compiler output:
a.cc:1:25: error: missing terminating > character
    1 | #include <bits/stdc++.h.
      |                         ^
a.cc:1:10: fatal error: bits/stdc++.h.: No such file or directory
    1 | #include <bits/stdc++.h.
      |          ^
compilation terminated.
Language: C++

#include <iosteam>
using namespace std;

int is_kaibun(int n){
  int m = n, reverse_n = 0;
  while(m>0){
    reverse_n = reverse_n*10 + m%10;
    m /= 10;
  }
  if(n == reverse_n){return 1;}
  else {return 0;}
}

int main(){
  int a,b;
  int c = 0;
  cin >> a >> b;
  for(a;a <= b;++a){
    if(is_kaibun(a) == 1){ ++c;}
  }
  cout << c << end1
}

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

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:10:21: error: expected primary-expression before '<' token
   10 |   for(int i = A; i =< B; i ++ ){
      |                     ^
a.cc:15:18: error: 'ensl' was not declared in this scope
   15 |   cout << ans << ensl;
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A, B, S;
  cin >> A >> B;
  
  while (A < B + 1) {
      int a0, a1, a2, a3, a4;
		a0 = A / 10000 * 10000;
  		a1 = (A - a0) / 1000 * 1000;
  		a2 = (A - a0 - a1) / 100 * 100;
  		a3 = (A - a0 - a1 - a2) / 10 * 10;
  		a4 = A - a1 -a2 -a3;
  
  if (a0 / 10000 + a1 / 100 + a2 + a3 * 100 +a4 * 10000 - A == 0 )
    S++;
    
    A++;
  }
}
    

Compiler output:
a.cc:16:40: error: extended character   is not valid in an identifier
   16 |   if (a0 / 10000 + a1 / 100 + a2 + a3 * 100 +a4 * 10000 - A == 0 )
      |                                        ^
a.cc: In function 'int main()':
a.cc:16:40: error: '\U000000a0100' was not declared in this scope
   16 |   if (a0 / 10000 + a1 / 100 + a2 + a3 * 100 +a4 * 10000 - A == 0 )
      |                                        ^~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 1; i <= (int)(n); i++)
using namespace std;

int main() {
  int a,b,sum;
  sum = 0;
  cin >> a >> b;
  for(i = a; i <= b; i++) {
    if(i/10000 == i%10 && (i/10)/1000 == (i/10)%10) {
      sum++;
    }
  }
  cout << sum << endl;
}

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

#include <bits/stdc++.h>
using namespace std;
bool isPalindrome(string s) {
  string t=s;
  reverse(t.begin(),t.end());
  return s==t;
}
int main() {
  int a,b;
  cin >> a >> b;
  int ans=0;
  for(int i=0;i<b-a;++i) {
    string s=sprintf(a);
    if(ispalindorome(s)) ans++;
    a++;
  }
  cout << ans << endl;
  return 0;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:13:22: error: invalid conversion from 'int' to 'char*' [-fpermissive]
   13 |     string s=sprintf(a);
      |                      ^
      |                      |
      |                      int
a.cc:13:21: error: too few arguments to function 'int sprintf(char*, const char*, ...)'
   13 |     string s=sprintf(a);
      |              ~~~~~~~^~~
In file included from /usr/include/c++/14/cstdio:42,
                 from /usr/include/c++/14/ext/string_conversions.h:45,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/stdio.h:365:12: note: declared here
  365 | extern int sprintf (char *__restrict __s,
      |            ^~~~~~~
a.cc:14:8: error: 'ispalindorome' was not declared in this scope; did you mean 'isPalindrome'?
   14 |     if(ispalindorome(s)) ans++;
      |        ^~~~~~~~~~~~~
      |        isPalindrome
Language: C++

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

long main() {
  int A, B, i=0;
  cin >> A >> B;
  
  for(int n=A;n<=B;n++) {
    int a, b, c, d, e;
     a==n/10000%10;
     b==n/1000%10;
     c==n/100%10;
     d==n/10%10;
     e==n%10;
    if(a==e && b==d) {
      i++;
    }
  }
  cout << i << endl;
}

Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C

#include <stdio.h>

int main(){
  int A, B;
  scanf ("%d %d", &A , &B );
  int a, b, c;
  int answer = 0;
  for (a = 1; a <= 9; a++){
   for (b = 0; b <= 9; b++){
    for (c = 0; c <= 9; c++){
     int x = 10001 * a + 1010 * b + 100 * c;
     if (x >= A && x <= B){
       answer++
     }
    }
   }
  }
  printf ("%d\n",answer);
}








Compiler output:
main.c: In function 'main':
main.c:13:16: error: expected ';' before '}' token
   13 |        answer++
      |                ^
      |                ;
   14 |      }
      |      ~
Language: C

#inclde <stdio.h>

main(){
  int A, B;
  scanf ("%d %d", &A , &B );
  int a, b, c;
  int answer = 0;
  for (a = 1; a <= 9; a++){
   for (b = 0; b <= 9; b++){
    for (c = 0; c <= 9; c++){
     int x = 10001 * a + 1010 * b + 100 * c;
     if (x >= A && x <= B){
       answer++
     }
    }
   }
  }
  printf ("%d\n",answer);
}








Compiler output:
main.c:1:2: error: invalid preprocessing directive #inclde; did you mean #include?
    1 | #inclde <stdio.h>
      |  ^~~~~~
      |  include
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main(){
      | ^~~~
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf ("%d %d", &A , &B );
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #inclde <stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf ("%d %d", &A , &B );
      |   ^~~~~
main.c:5:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:13:16: error: expected ';' before '}' token
   13 |        answer++
      |                ^
      |                ;
   14 |      }
      |      ~          
main.c:18:3: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   18 |   printf ("%d\n",answer);
      |   ^~~~~~
main.c:18:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:18:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:18:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#inclde <stdio.h>

main(){
  int A, B;
  scanf ("%d %d", &A , &B );
  int a, b, c;
  int answer = 0;
  for (a = 1; a <= 9; a++);
   for (b = 0; b <= 9; b++);
    for (c = 0; c <= 9; c++);
     int x = 10001 * a + 1010 * b + 100 * c;
     if (x >= A && x <= B){
       answer++
     }
    }
   }
  }
  printf ("%d\n",answer);
}








Compiler output:
main.c:1:2: error: invalid preprocessing directive #inclde; did you mean #include?
    1 | #inclde <stdio.h>
      |  ^~~~~~
      |  include
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main(){
      | ^~~~
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf ("%d %d", &A , &B );
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #inclde <stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf ("%d %d", &A , &B );
      |   ^~~~~
main.c:5:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:13:16: error: expected ';' before '}' token
   13 |        answer++
      |                ^
      |                ;
   14 |      }
      |      ~          
main.c: At top level:
main.c:16:4: error: expected identifier or '(' before '}' token
   16 |    }
      |    ^
main.c:17:3: error: expected identifier or '(' before '}' token
   17 |   }
      |   ^
main.c:18:11: error: expected declaration specifiers or '...' before string constant
   18 |   printf ("%d\n",answer);
      |           ^~~~~~
main.c:18:18: error: unknown type name 'answer'
   18 |   printf ("%d\n",answer);
      |                  ^~~~~~
main.c:19:1: error: expected identifier or '(' before '}' token
   19 | }
      | ^
Language: C

#inclde <stdio.h>

main(){
  int A, B;
  scanf ("%d %d", &A , &B );
  int a, b, c;
  int answer = 0;
  for (a = 1, a <= 9, a++);
   for (b = 0, b <= 9, b++);
    for (c = 0, c <= 9, c++);
     int x = 10001 * a + 1010 * b + 100 * c;
     if (x >= A && x <= B){
       answer++
     }
    }
   }
  }
  printf ("%d\n",answer);
}








Compiler output:
main.c:1:2: error: invalid preprocessing directive #inclde; did you mean #include?
    1 | #inclde <stdio.h>
      |  ^~~~~~
      |  include
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main(){
      | ^~~~
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf ("%d %d", &A , &B );
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #inclde <stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf ("%d %d", &A , &B );
      |   ^~~~~
main.c:5:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:8:26: error: expected ';' before ')' token
    8 |   for (a = 1, a <= 9, a++);
      |                          ^
      |                          ;
main.c:8:26: error: expected expression before ')' token
main.c:9:27: error: expected ';' before ')' token
    9 |    for (b = 0, b <= 9, b++);
      |                           ^
      |                           ;
main.c:9:27: error: expected expression before ')' token
main.c:10:28: error: expected ';' before ')' token
   10 |     for (c = 0, c <= 9, c++);
      |                            ^
      |                            ;
main.c:10:28: error: expected expression before ')' token
main.c:13:16: error: expected ';' before '}' token
   13 |        answer++
      |                ^
      |                ;
   14 |      }
      |      ~          
main.c: At top level:
main.c:16:4: error: expected identifier or '(' before '}' token
   16 |    }
      |    ^
main.c:17:3: error: expected identifier or '(' before '}' token
   17 |   }
      |   ^
main.c:18:11: error: expected declaration specifiers or '...' before string constant
   18 |   printf ("%d\n",answer);
      |           ^~~~~~
main.c:18:18: error: unknown type name 'answer'
   18 |   printf ("%d\n",answer);
      |                  ^~~~~~
main.c:19:1: error: expected identifier or '(' before '}' token
   19 | }
      | ^
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  int sum = 0;
  
  for (int i = 0; i < (B - A); i++) {
    int a, b, c, d, e;
    a = A %= 10;
    b = A %= 10;
    c = A %= 10;
    d = A %= 10;
    e = A %= 10;
      
    if (a = e && b = d) { 
      sum++;
    }
  }
  cout << sum << endl;
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:17:15: error: lvalue required as left operand of assignment
   17 |     if (a = e && b = d) {
      |             ~~^~~~
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  int sum = 0;
  
  for (int i = 0; i < (B - A); i++) {
    a = A %= 10;
    b = A %= 10;
    c = A %= 10;
    d = A %= 10;
    e = A %= 10;
      
    if (a = e && b = d) { 
      sum++;
    }
  }
  cout << sum << endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'a' was not declared in this scope
   10 |     a = A %= 10;
      |     ^
a.cc:11:5: error: 'b' was not declared in this scope
   11 |     b = A %= 10;
      |     ^
a.cc:12:5: error: 'c' was not declared in this scope
   12 |     c = A %= 10;
      |     ^
a.cc:13:5: error: 'd' was not declared in this scope
   13 |     d = A %= 10;
      |     ^
a.cc:14:5: error: 'e' was not declared in this scope
   14 |     e = A %= 10;
      |     ^
Language: C++

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

bool isPalindromic(int n) {
  if ( n/10000==n%10 && n/1000-n/10000*10==n%100/10 ) return true;
  else return false;
}

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

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

#include<stdio.h>

int main(void)
{
  int a,b;
  int a_345=0;
  int b_345=0;
  scanf("%d %d",&a,&b);

  int temp=0;
  int keta1=0;
  int keta2=0;
  int keta4=0;
  int keta5=0;
  int count =0;
//  printf("%d %d %d %d ",a/1000,a-a_345*100,b/1000,b-b_345*100);

  for(int i=a; i<=b; i++){
    temp = i;
    keta1 = temp%10; temp/10;
    keta2 = temp%10; temp/100
    keta4 = temp%10; temp/10;
    keta5 = temp%10;
    if((keta1 == keta5)&&(keta2 == keta4)){
      count ++;
    }
  }

  printf("%d",count);

    return 0;

}



Compiler output:
main.c: In function 'main':
main.c:21:30: error: expected ';' before 'keta4'
   21 |     keta2 = temp%10; temp/100
      |                              ^
      |                              ;
   22 |     keta4 = temp%10; temp/10;
      |     ~~~~~
Language: C

#include<stdio .h>
int main() { 
int a , b; 
scanf(”%d%d” , &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&&u == v) r++;
} 
printf("%d\n" , r );
}


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

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A,B;
  cin >> A >> B;
  for(int i=A;i<=B;i++){
    int x=0;
    int s=i%10;
    int t=i%100;
    int u=i%10000;
    int v=i%100000;
    if(s=v&&t=u){
      x++;
    }
    cout << x << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:11: error: lvalue required as left operand of assignment
   12 |     if(s=v&&t=u){
      |          ~^~~
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 x=0;
    int s=i%10,int t=i%100,
    int u=i%10000,int v=i%100000;
    if(s=v&&t=u){
      x++;
    }
    cout << x << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: expected unqualified-id before 'int'
    8 |     int s=i%10,int t=i%100,
      |                ^~~
a.cc:10:10: error: 'v' was not declared in this scope
   10 |     if(s=v&&t=u){
      |          ^
a.cc:10:13: error: 't' was not declared in this scope
   10 |     if(s=v&&t=u){
      |             ^
a.cc:10:15: error: 'u' was not declared in this scope
   10 |     if(s=v&&t=u){
      |               ^
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 x=0;
    int s=i%10,int t=i%100,
    int u=i%10000,int v=i%100000;
    if(s=v&&t=u){
      x++;
    }
    cout << x << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:13: error: 'a' was not declared in this scope
    6 |   for(int i=a;i<=b;i++){
      |             ^
a.cc:6:18: error: 'b' was not declared in this scope
    6 |   for(int i=a;i<=b;i++){
      |                  ^
a.cc:8:16: error: expected unqualified-id before 'int'
    8 |     int s=i%10,int t=i%100,
      |                ^~~
a.cc:10:10: error: 'v' was not declared in this scope
   10 |     if(s=v&&t=u){
      |          ^
a.cc:10:13: error: 't' was not declared in this scope
   10 |     if(s=v&&t=u){
      |             ^
a.cc:10:15: error: 'u' was not declared in this scope
   10 |     if(s=v&&t=u){
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A,B;
  cin >> A >> B;
  for(i=a;i<=b;i++){
    int x=0;
    int s=i%10,int t=i%100,
    int u=i%10000,int v=i%100000;
    if(s=v&&t=u){
      x++;
    }
    cout << x << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: 'i' was not declared in this scope
    6 |   for(i=a;i<=b;i++){
      |       ^
a.cc:6:9: error: 'a' was not declared in this scope
    6 |   for(i=a;i<=b;i++){
      |         ^
a.cc:6:14: error: 'b' was not declared in this scope
    6 |   for(i=a;i<=b;i++){
      |              ^
a.cc:10:10: error: 'v' was not declared in this scope
   10 |     if(s=v&&t=u){
      |          ^
a.cc:10:13: error: 't' was not declared in this scope
   10 |     if(s=v&&t=u){
      |             ^
a.cc:10:15: error: 'u' was not declared in this scope
   10 |     if(s=v&&t=u){
      |               ^
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); i++)
typedef long long ll;
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 && u == v)
    {
      r++;
    }
    cout << r << endl;
    return 0;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:20:4: error: expected '}' at end of input
   20 |   }
      |    ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
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 one = i%10;
        int ten = (i/10)%10
        int thousands = (i/10/10/10)%10; 
        int tenThousands = (i/10/10/10/10)%10;
        
        if(one == tenThousands && ten == thousands) {
            count++
        }
    }
    cout << count << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: expected ',' or ';' before 'int'
   11 |         int thousands = (i/10/10/10)%10;
      |         ^~~
a.cc:14:42: error: 'thousands' was not declared in this scope; did you mean 'tenThousands'?
   14 |         if(one == tenThousands && ten == thousands) {
      |                                          ^~~~~~~~~
      |                                          tenThousands
a.cc:15:20: error: expected ';' before '}' token
   15 |             count++
      |                    ^
      |                    ;
   16 |         }
      |         ~
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++) {
        o = i % 10;
        t = (i / 10) % 10;
        if ((i / 10000) == o && ((i / 1000) % 10) == t) {
            sum += 1;
        }
    }
    cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'o' was not declared in this scope
    9 |         o = i % 10;
      |         ^
a.cc:10:9: error: 't' was not declared in this scope
   10 |         t = (i / 10) % 10;
      |         ^
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++){
    string s=i;
    if(s[0]==s[4]&&s[1]==s[3]){
      sum++;
    }
    cout<<sum<<endl;
  }
    
    
      
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    9 |     string s=i;
      |              ^
a.cc:14:4: error: expected '}' at end of input
   14 |   }
      |    ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

bool check(int x){
  if( x%10==(x/10000)%10) && ((x/10)%10==(x/1000)%10) )
  	return 1;
  return 0;
}

int main(){
  cin >> A >> B;
  int count=0;
  for(int i=A;i<=B;i++){
	if(check(i))
      count++;
  }
}

Compiler output:
a.cc: In function 'bool check(int)':
a.cc:5:30: error: expected identifier before '(' token
    5 |   if( x%10==(x/10000)%10) && ((x/10)%10==(x/1000)%10) )
      |                              ^
a.cc: In function 'int main()':
a.cc:11:10: error: 'A' was not declared in this scope
   11 |   cin >> A >> B;
      |          ^
a.cc:11:15: error: 'B' was not declared in this scope
   11 |   cin >> A >> B;
      |               ^
Language: C++

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

bool check(int x){
  if(x%10==(x/10000)%10)&&((x/10)%10==(x/1000)%10)
  	return 1;
  return 0;
}

int main(){
  cin >> A >> B;
  int count=0;
  for(int i=A;i<=B;i++){
	if(check(i))
      count++;
  }
}

Compiler output:
a.cc: In function 'bool check(int)':
a.cc:5:27: error: expected identifier before '(' token
    5 |   if(x%10==(x/10000)%10)&&((x/10)%10==(x/1000)%10)
      |                           ^
a.cc: In function 'int main()':
a.cc:11:10: error: 'A' was not declared in this scope
   11 |   cin >> A >> B;
      |          ^
a.cc:11:15: error: 'B' was not declared in this scope
   11 |   cin >> A >> B;
      |               ^