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

#include<stdio.h>

int main(){
  long int i,N,ans;
  scanf("%ld",&N);
  if(N%2==1)
    printf("0\n");
  else
    ans=N/10 + N/100 + N/1000 + N/10000+N/100000+N/1000000+N/10000000+N/100000000+N/1000000000+N/10000000000+N/100000000000+N/1000000000000+N/10000000000000+N/100000000000000+N/100000000000000+N/1000000000000000+N/10000000000000000+N/100000000000000000+N/1000000000000000000
    printf("%ld\n",ans);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:275: error: expected ';' before 'printf'
    9 |     ans=N/10 + N/100 + N/1000 + N/10000+N/100000+N/1000000+N/10000000+N/100000000+N/1000000000+N/10000000000+N/100000000000+N/1000000000000+N/10000000000000+N/100000000000000+N/100000000000000+N/1000000000000000+N/10000000000000000+N/100000000000000000+N/1000000000000000000
      |                                                                                                                                                                                                                                                                                   ^
      |                                                                                                                                                                                                                                                                                   ;
   10 |     printf("%ld\n",ans);
      |     ~~~~~~
Language: C++

#include <iostream> 
using namespace std;  
int main() 
{ 
  
    long long n,count++;
    cin>>n;
    while(n>0)
    {
      
      product*=n;
      n=n-2;
    }
  while(n!=0)
  {
    int rem=n%10;
    if(rem==0)
      count++;
    n=n/10;
  }
  cout<<count<<endl;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:6:22: error: expected initializer before '++' token
    6 |     long long n,count++;
      |                      ^~
a.cc:11:7: error: 'product' was not declared in this scope
   11 |       product*=n;
      |       ^~~~~~~
a.cc:18:7: error: 'count' was not declared in this scope
   18 |       count++;
      |       ^~~~~
a.cc:21:9: error: 'count' was not declared in this scope
   21 |   cout<<count<<endl;
      |         ^~~~~
Language: C++

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

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back

template<class T>bool chmax(T &a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T &a,T b){if(a>b){a=b;return 1;}return 0;}

typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int dx[4]={1,0,-1,0};
const int dy[4]={0,1,0,-1};

ll ans=0;
ll x=5;
unsigned long long doublefactorial(long long a) {

	while(x>=a){
		ans++;
		x*=x;
	}


    if (a==0 || a==1) 
      return 1; 
    return a*doublefactorial(a-2); 
} 

int main(){
	ll n;
	cin>>n;


	ll x=5;
	ll sum=0;
	ll sum2=0;
	if(n%2==0){
		while(x<=n/2){
			sum+=n/2/x;
			x*=5;
		}
		cout<<sum<<endl;
		return 0;
	}else{
		while(x<=2n){
			sum+=2n/x;
			x*=5;
		}
		while(x<=n){
			sum+=n/x;
			x*=5;
		}
		cout<<sum/sum2<<endl;
	}

	

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:26: error: unable to find numeric literal operator 'operator""n'
   50 |                 while(x<=2n){
      |                          ^~
a.cc:51:30: error: unable to find numeric literal operator 'operator""n'
   51 |                         sum+=2n/x;
      |                              ^~
Language: C++

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


int main() {
int N;
cin>>N;
  int total;
if(N%2==0){ total=2;
for(int i=1;i<N/2;i++){
  total=total*(2*i+2); }
          int counter=0;
           string Y;
           Y=to_string(total);
           int Z=Y.size();
           for(int i=Z;i<Z;i--){
             if(Y.at(i)==0){counter++;)
               else{break;}
                          }
             cout<<counter<<endl;
          
          }
  if(N%2==1){cout<<0<<endl;}
  

}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:39: error: expected primary-expression before ')' token
   17 |              if(Y.at(i)==0){counter++;)
      |                                       ^
a.cc:26:2: error: expected '}' at end of input
   26 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: Java

import java.util.*;

class Main{
 public static void main(String args[]){
   Scanner scn = new Scanner(System.in);
   long l = (long)scn.next();
   if(n%2 == 1){
     System.out.println(0);
     return;
   }else{
     int five = 5;
     int i = 0;
     while(n=>five){
       i += (int)n/five;
       five *= 5
     }
     System.out.println(i);
   }
 }
}

Compiler output:
Main.java:13: error: illegal start of expression
     while(n=>five){
             ^
Main.java:15: error: ';' expected
       five *= 5
                ^
2 errors
Language: C++

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


int main() {
int N;
cin>>N;
  int total;
if(N%2==0){ total=2;
for(int i=1;i<N/2;i++){
  total=total*(2*i+2); }
          int counter=0;
           string Y;
           Y=to_string(total);
           int Z=Y.size();
           for(int i=Z;i<Z;i--){
             if(Y.at(i)==){counter++;)
               else{break;}
                          }
             cout<<counter<<endl;
          
          }
  if(N%2==1){cout<<0<<endl;}
  

}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:26: error: expected primary-expression before ')' token
   17 |              if(Y.at(i)==){counter++;)
      |                          ^
a.cc:17:38: error: expected primary-expression before ')' token
   17 |              if(Y.at(i)==){counter++;)
      |                                      ^
a.cc:26:2: error: expected '}' at end of input
   26 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

#include<iostream>
#include<cstdio> 
#include<cstring>
#include<stack>
#include<queue>
#include<set>
#include<map>
#include<vector>
#include<list>
#include<cmath>
#include<algorithm>
#define lson node<<1,st,mid
#define rson node<<1|1,mid+1,ed
#define mem(a,x) memset(a,x,sizeof(a))
#define me(a) memset(a,0,sizeof(a))
#define IOS ios::sync_with_stdio(false)
#define lowbit(x) x&(-x)
typedef long long ll;
const ll mod=1e9+7;
const ll INF=0x3f3f3f3f;
const ll maxn=1e6+5;
const double pi = acos(-1.0);
using namespace std;
ll a[50],b[50];
ll main(){
	ll n;
//	a[1]=1;
//	a[2]=2;
//	a[3]=3;
//	for(ll i=4;i<=100;i++){
//		a[i]=i*a[i-2];
//	}
//	for(ll i=1;i<=100;i++){
//		cout<<a[i]<<endl;
//	}
	a[0]=0;
	b[0]=0;
	b[1]=9;b[2]=99;b[3]=999;b[4]=9999;b[5]=99999;b[6]=999999;
	b[7]=9999999;b[8]=99999999;b[9]=999999999;b[10]=9999999999;b[11]=99999999999;b[12]=999999999999;
	b[13]=9999999999999;b[14]=99999999999999;b[15]=999999999999999;b[16]=9999999999999999;b[17]=99999999999999999;b[18]=999999999999999999;
	b[19]=9999999999999999999;
	
	for(ll i=1;i<=20;i++){
		a[i]+=b[i];
	}
	cin>>n;
	if(n<10) cout<<"0"<<endl;
	else{
		if(n%2==0) {
			cout<<n/10<<endl;
		}
		else cout<<"0"<<endl;
	}
	

Compiler output:
a.cc:41:15: warning: integer constant is so large that it is unsigned
   41 |         b[19]=9999999999999999999;
      |               ^~~~~~~~~~~~~~~~~~~
a.cc:25:1: error: '::main' must return 'int'
   25 | ll main(){
      | ^~
a.cc: In function 'int main()':
a.cc:53:10: error: expected '}' at end of input
   53 |         }
      |          ^
a.cc:25:10: note: to match this '{'
   25 | ll main(){
      |          ^
Language: Java

function Main(input) {
    input = parseInt(input);
    var result = 0;
    while(input>0){
        result += checkZero(input)
        input = input -2;
    }
    console.log(result)
 
}
 
function checkZero(multi){
    var i = true;
    multi = multi.toString()
    var index=multi.toString().length-1;
    var result = 0;
    while(i){
        if(multi[index] == "0"){
            index--;
            result++;
        }
        else{
            i = false;
        }
    }
    return result;
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
function Main(input) {
^
  (use --enable-preview to enable unnamed classes)
Main.java:1: error: <identifier> expected
function Main(input) {
                   ^
Main.java:5: error: ';' expected
        result += checkZero(input)
                                  ^
Main.java:8: error: ';' expected
    console.log(result)
                       ^
Main.java:12: error: <identifier> expected
function checkZero(multi){
                        ^
Main.java:14: error: ';' expected
    multi = multi.toString()
                            ^
Main.java:28: error: class, interface, enum, or record expected
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
^
7 errors
Language: Java

import java.util.Scanner;

 public static void main(String[] args) {
        Scanner s = new Scanner (System.in);
        int num = s.nextInt();
        int sum1 = 0;
        int sum2 = 0;

        for(int i =1; i<num ;i++) {
            if (i % 2 == 0) {
              sum1+= i;
            }
            else if (i % 2 != 0){
                sum2 += i;
            }
        }

        if ((!(sum1< Math.pow(10, 18))) || (!(sum2 < Math.pow(10, 18)))) {
            if (num % 2 == 0){
                System.out.println(sum1);
            }else {
                System.out.println(sum2);
            }

        }
        
    }



Compiler output:
Main.java:3: error: unnamed classes are a preview feature and are disabled by default.
 public static void main(String[] args) {
               ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: C++

#include <bits/stdc++.h> 
using namespace std;
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define sz(x) (int)(x).size()
typedef vector<int> vi;
// #define ll long long 
#define int long long
#define ld long double
#define fi first
#define se second
#define pb push_back
#define pii pair<int,int>
#define all(x) (x).begin(), (x).end()
const int MOD = 1e9+7;
int mpow(int a,int b,int p=MOD){a=a%p;int res=1;while(b>0){if(b&1)res=(res*a)%p;a=(a*a)%p;b=b>>1;}return res%p;}
const int N=2e5+2;

int32_t main(){
      ios_base::sync_with_stdio(false);
      cin.tie(NULL);

       int n;
      cin>>n;
      int ans1=0;
      int ans2=0;
      int n1=n;
      int s=0;
      for(int i=60;i>=1;i--)
      {
        int o=n/(1LL<<i);
        o-=s;
        ans1+=o*i;
        s+=o;
        // cout<<o<<" ";
      }
      // cout<<"\n";
      n=n1;
      s=0;
      // int lol[60]={0};
      for(int i=26;i>=1;i--)
      {
        // int o=0;
        // int lol1[60]={0};
        int oof=1LL;
        for(int k=0;k<i;k++) {
          oof*=5LL;
        }
        if(oof>1e18LL/2LL) continue;
        oof*=2LL;
        int o=n/oof;
        o-=s;
        ans2+=o*i;
        s+=o;
      }
      // cout<<ans1<<" "<<ans2<<"\n";
      cout<<min(ans1,ans2);
} 
// I never lose. I either win or I learn

Compiler output:
a.cc: In function 'int32_t main()':
a.cc:49:16: error: unable to find numeric literal operator 'operator""LL'
   49 |         if(oof>1e18LL/2LL) continue;
      |                ^~~~~~
Language: Java

import java.util.Scanner;

public class Code {
    public static void main(String[] args) {
        Scanner s = new Scanner (System.in);
        int num = s.nextInt();
        int sum1 = 0;
        int sum2 = 0;

        for(int i =1; i<num ;i++) {
            if (i % 2 == 0) {
              sum1+= i;
            }
            else if (i % 2 != 0){
                sum2 += i;
            }
        }

        if ((!(sum1< Math.pow(10, 18))) || (!(sum2 < Math.pow(10, 18)))) {
            if (num % 2 == 0){
                System.out.println(sum1);
            }else {
                System.out.println(sum2);
            }

        }
        
    }
}


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

#include<iostream>
#include<sstream>  
using namespace std;
 
int main()
{
    long a;
    cin >> a;
    long result = 0;
    while(input>0){
        result += checkZero(input)
        input = input -2;
    }
    cout << result;
    return 0;
}
int checkZero(int multi){
	boolean i = true;
    string str= to_string(multi);
    long index=str.length-1;
    int result = 0;
  while(i){
        if(multi[index] == "0"){
            index--;
            result++;
        }
        else{
            i = false;
        }
    }
  return result;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:11: error: 'input' was not declared in this scope; did you mean 'int'?
   10 |     while(input>0){
      |           ^~~~~
      |           int
a.cc:11:19: error: 'checkZero' was not declared in this scope
   11 |         result += checkZero(input)
      |                   ^~~~~~~~~
a.cc: In function 'int checkZero(int)':
a.cc:18:9: error: 'boolean' was not declared in this scope; did you mean 'bool'?
   18 |         boolean i = true;
      |         ^~~~~~~
      |         bool
a.cc:20:20: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   20 |     long index=str.length-1;
      |                ~~~~^~~~~~
      |                          ()
a.cc:22:9: error: 'i' was not declared in this scope
   22 |   while(i){
      |         ^
a.cc:23:17: error: invalid types 'int[long int]' for array subscript
   23 |         if(multi[index] == "0"){
      |                 ^
Language: C++

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

int main()
{
  ll n,x;
  cin>>n;
  if(n==0 || n==1)
  {
  
  cout<<"1";
  return 0;
}
  if(n%2==0)
  {
  	ans2=n/10;
  	
	  cout<<ans2;
  }
  else
  {
  	cout<<"0";
  }
  
 

}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: 'ans2' was not declared in this scope
   17 |         ans2=n/10;
      |         ^~~~
Language: C

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

int main(){
    long long int n,k,ans;
    scanf("%lld",&n);
    k=(n+1)/2;
    for(int i=0;i<k;i++){
       ans=ans*k*(i+1);
    }
  printf("lld",ans)
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:12:20: error: expected ';' before 'return'
   12 |   printf("lld",ans)
      |                    ^
      |                    ;
   13 |     return 0;
      |     ~~~~~~
Language: C

#include <stdio.h>

int main(void){

    long long N = 0;
    scanf("%lld", &N);

    long long count = 0

    if (count % 2 == 0){
        count = N / 10;
        N = N % 10;
        count += N / 5;
    }

    printf("%lld\n", count);
    

    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:5: error: expected ',' or ';' before 'if'
   10 |     if (count % 2 == 0){
      |     ^~
Language: C

#include<stdio.h>
int main()
{
    int i;
    double n,count=0;
    scanf("%lf",&n);
    for(i=n;i>1;i=i-2){
        n=n*(n-2);
    }
    for(i=0;i<2;i++){
        if(n%10==0){
            count++;
            n=n/10;
        }
    }
    printf("%.0f\n",count);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:13: error: invalid operands to binary % (have 'double' and 'int')
   11 |         if(n%10==0){
      |             ^
Language: C++

#include<bits/stdc++.h>
using namesace std;
int main()
{long long n;long long count=0;
 cin>>n;
 if (n%2!=0)
   cout<<0;
 else
   
 
 
 {for (int i = 5; (n/2) / i >= 1; i *= 5) 
     {count += n / i; cout<<count;}}
       
 
 
    
 
 
 
 
 
 
 
 
  
  
  
  
  
  
  
  
  
  
  return 0;}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namesace'
    2 | using namesace std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:5:2: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |  cin>>n;
      |  ^~~
      |  std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:4: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |    cout<<0;
      |    ^~~~
      |    std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:13:23: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   13 |      {count += n / i; cout<<count;}}
      |                       ^~~~
      |                       std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
m=1000000007;
int main(){
  long long int t,sum=1,c=0,k;
  cin>>t;
  if(t%2==0){
  	k=2;
  }
  else k=1;
    for(int i=k;i<t;i+=2){
    sum=(sum*i)%m;
    }
  while(sum%10==0){
  	c++;
    sum=sum/10;
  }
  cout<<c;
  return 0;
}

Compiler output:
a.cc:3:1: error: 'm' does not name a type; did you mean 'tm'?
    3 | m=1000000007;
      | ^
      | tm
a.cc: In function 'int main()':
a.cc:12:17: error: 'm' was not declared in this scope
   12 |     sum=(sum*i)%m;
      |                 ^
Language: C

#include <stdio.h>

int main(void){

    long long N = 0;
    scanf("%lld", &N);

    long long count = 0

    count = N / 10;
    N = N % 10;
    count += N / 5;

    printf("%lld\n", count);
    

    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:5: error: expected ',' or ';' before 'count'
   10 |     count = N / 10;
      |     ^~~~~
Language: C++

#include<iostream>
using namespace std;
int main()
{
  long long int n,i,c=0,t,m,p=0;
  cin>>n;
  if(n%2 !=0)
  {
    cout<<"0";
    return 0;
  }
  else
  {
    while(n %10 != 0)
      n=n-2;
   	t=n;
    p=5;
    while(t/p != 0 )
    {
      m=t/p;
	  c+=((m-2)/2 + 1);
      p=p*5;
  }
  cout<<c;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:2: error: expected '}' at end of input
   26 | }
      |  ^
a.cc:4:1: note: to match this '{'
    4 | {
      | ^
Language: C++

#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<string>
#include<cmath>
#include<map>
#include<stack>
#include<vector>
#include<queue>
#include<set>
#include<algorithm>
const int N = 200000+5;
using namespace std;
#define INF 0x3f3f3f3f
#define mod 1000000009
#define e  2.718281828459045
#define PI acos(-1)
#define lowbit(x) (x&(-x))
#define read(x) scanf("%d",&x)
#define put(x) printf("%d\n",x)
#define memset(x,y) memset(x,y,sizeof(x))
#define ll long long
using namespace std;
typedef long long ll;
int main(){
	ll a;
	cin >> a;
	if(a%2==1)
	cout << 0 << endl;
	else{
		ll t=10;
		ll ans=0;
		ll c;
		while(c=a/t){
			ans+=c;
			t*=10;
		}
		t=50;
		while(c=a/t){
			ans+=c;
			t*=5;
		}
		t=100;
		while(c=a/t){
			ans-=c;
			t*=10;
		}
		cout << ans << endl;
	}
	return 0;
}


Compiler output:
a.cc:23:12: error: 'long long long' is too long for GCC
   23 | #define ll long long
      |            ^~~~
a.cc:25:19: note: in expansion of macro 'll'
   25 | typedef long long ll;
      |                   ^~
a.cc:23:17: error: 'long long long' is too long for GCC
   23 | #define ll long long
      |                 ^~~~
a.cc:25:19: note: in expansion of macro 'll'
   25 | typedef long long ll;
      |                   ^~
a.cc:23:17: error: declaration does not declare anything [-fpermissive]
   23 | #define ll long long
      |                 ^~~~
a.cc:25:19: note: in expansion of macro 'll'
   25 | typedef long long ll;
      |                   ^~
Language: C++

N = int(input())

if N % 2 == 1:
    print(0)
    exit()

res = 0

c = 1
res += N // 10
N //= 10
while N // 5 ** c > 0:
    res += N // 5 ** c
    c += 1
print(res)


Compiler output:
a.cc:1:1: error: 'N' does not name a type
    1 | N = int(input())
      | ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <deque>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <cstring>
#include <iomanip>
#include <utility>
 
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,n) for(int i=1;i<=(n);i++)
const int INF = 0x3f3f3f3f;
const long long LINF = 0x3f3f3f3f3f3f3f3fLL;
using namespace std;


int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    long long n;
    cin>>n;
    if(n<=1){
      cout<<1<<'\n';
      return 0;
    }

    long long five=0,bord=1;

    while(n>=bord){
      bord*=5;
      five+=(n/bord)/2;
      
    }
    if(n%2==1){
      five--;
    }
    cout<<max(five,0)<<'\n';
   
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:43:14: error: no matching function for call to 'max(long long int&, int)'
   43 |     cout<<max(five,0)<<'\n';
      |           ~~~^~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:43:14: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   43 |     cout<<max(five,0)<<'\n';
      |           ~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:3:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:43:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   43 |     cout<<max(five,0)<<'\n';
      |           ~~~^~~~~~~~
Language: C++

#inlcude<bits/stdc++.h>
using namesace std;
int main()
{long long n;
 cin>>n;
 if (n%2!=0)
   cout<<0;
 else
   
 { while(1)
 
    { if(n%10!==0)
          {n=n-2;
          }
       else
       { cout<<n/10;
       break;
       }
 
 
 
 
 
 }
 
 
 
 
 }
  
  
  
  
  
  
  
  
  
  
  return 0;}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inlcude; did you mean #include?
    1 | #inlcude<bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc:2:7: error: expected nested-name-specifier before 'namesace'
    2 | using namesace std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:5:2: error: 'cin' was not declared in this scope
    5 |  cin>>n;
      |  ^~~
a.cc:7:4: error: 'cout' was not declared in this scope
    7 |    cout<<0;
      |    ^~~~
a.cc:12:16: error: expected primary-expression before '=' token
   12 |     { if(n%10!==0)
      |                ^
a.cc:16:10: error: 'cout' was not declared in this scope
   16 |        { cout<<n/10;
      |          ^~~~
Language: C++

int main(void) {
    long long int n;
    cin>>n;
    if (n%2==1) {
        cout<<0<<endl;
    } else {
        cout<<n/10<<endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin>>n;
      |     ^~~
a.cc:5:9: error: 'cout' was not declared in this scope
    5 |         cout<<0<<endl;
      |         ^~~~
a.cc:5:18: error: 'endl' was not declared in this scope
    5 |         cout<<0<<endl;
      |                  ^~~~
a.cc:7:9: error: 'cout' was not declared in this scope
    7 |         cout<<n/10<<endl;
      |         ^~~~
a.cc:7:21: error: 'endl' was not declared in this scope
    7 |         cout<<n/10<<endl;
      |                     ^~~~
Language: C++

#include<iostream>
using namespace std;
int main(){
  unsigned long long N, k, m;
  k = 10;
  m = 0;
  cin >> N;
  if(N % 2 == 1){
    cout << 0;
  }
  else{
    while((N-(N%k)) / k != 0){
      m += N-(N%k)) / k;
      k *= 10;
    }
    cout << m;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:19: error: expected ';' before ')' token
   13 |       m += N-(N%k)) / k;
      |                   ^
      |                   ;
Language: C++

a = int(input())
ans = 0
if a < 6:
	print(0)
elif a % 10 != 0:
	print(1)
else:
	ans += a/5 + a/25 + a/125
	print(ans)



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

#include <vector>
#include <math.h>
#include <iostream>
#include <string>
#include <algorithm>
#include <queue>
#include <iomanip>
#include <deque>
#include <map>
#include <boost/multiprecision/cpp_int.hpp>

typedef long long ll;
#define rep(i, a, n) for(int i = a; i<n; i++)
#define ALL(a) begin(a), end(a)
#define mii map<int, int>
#define msi map<string, int>
#define vi vector<int>
#define vl vector<ll>
#define MOD 1000000007
using namespace std;
namespace mp = boost::multiprecision;
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
double memo[100000000000];

mp::cpp_int fib(int n) {
    if (n < 2) return 1;
    if (memo[n] != 0) return memo[n];
    return memo[n] = n * fib(n - 2);
}

int main() {
    double N;
    cin >> N;
    int count = 0;
    mp::cpp_int ans = fib(N);
    while(true) {
        if (fmod(ans, 10) == 0) {
            ++count;
            ans = ans / 10;
        } else {
            break;
        }
    }
    cout << count << endl;

    return 0;
}

Compiler output:
a.cc:10:10: fatal error: boost/multiprecision/cpp_int.hpp: No such file or directory
   10 | #include <boost/multiprecision/cpp_int.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ll long int

int main(){
    long int n;
    cin >> n;

    long int k = 1,c2 = 0,c5 = 0,v,l;

    if(n % 2 == 0) v = 2;
    else v = 3;

    long int y = n;

    if(n % 2 = 1){
        cout << 0 << endl;
    }

    for(long int i = 0; i <= y / 2; i += 2){
        k = n - i;
        l = v + i;
        while(k % 2 == 0 || k % 5 == 0 || l % 2 == 0 || l % 5 == 0){
                if(k % 2 == 0){c2++;k /= 2;}
                if(k % 5 == 0){c5++;k /= 5;}
                if(k > l && l % 2 == 0){c2++;l /= 2;}
                if(k > l && l % 5 == 0){c5++;l /= 5;}
        }
    }

    long int ans = min(c2,c5);

    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:10: error: lvalue required as left operand of assignment
   16 |     if(n % 2 = 1){
      |        ~~^~~
Language: C++

n  = int(input())
mod = 1e9+7
d  = 10
xs = []

while d <= n:
	xs.append(n // d)
	d *= 10
    d %=mod

c = 0
k = 1
y = 0

for x in xs:
	c += (k - y) * x
    c %=mod
	k += 1
	y  = y * 10 + 1
    y %=mod
    

print(c)



Compiler output:
a.cc:1:1: error: 'n' does not name a type
    1 | n  = int(input())
      | ^
Language: C++

#include<iostream>
using namespace std;
long num=0;
int main()
{
    long long n;
    cin>>n;
    for(;n>0;n=n-2)
    {
    	long two=0,five=0,x=n;
    	while(x%2==0||x%5==0)
    	{
    		if(x%2==0)
    		{
    			two++;
    			x/=2;
			}
			else
			{
				five++;
				x/=5;
			}
		}112
		if(two>five)
		num+=five;
		else
		num+=two;
	}
	cout<<num;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:21: error: expected ';' before 'if'
   23 |                 }112
      |                     ^
      |                     ;
   24 |                 if(two>five)
      |                 ~~   
a.cc:26:17: error: 'else' without a previous 'if'
   26 |                 else
      |                 ^~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

#define int long long

void solve()
{
	if(n % 2 == 1)
	{
		cout << 0;
		return 0;
	}
	
	int n;
	cin >> n;
	
	int res = 0;
	
	for(int i = 5; i <= n; i *= 5)
		res += (n / i) / 2;
	
	cout << res;
}

main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	
	int t = 1;
//	cin >> t;

	while(t--)
	{
		solve();
	}
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:9:12: error: 'n' was not declared in this scope; did you mean 'yn'?
    9 |         if(n % 2 == 1)
      |            ^
      |            yn
a.cc:12:24: error: return-statement with a value, in function returning 'void' [-fpermissive]
   12 |                 return 0;
      |                        ^
a.cc: At global scope:
a.cc:26:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   26 | main()
      | ^~~~
Language: C++

#include <iostream> 
using namespace std; 

typedef unsigned long long int ll;

ull hello(ll n) 
{ 
	ull count = 0; 

	for (ull i = 5; n / i >= 1; i *= 5) 
		count += (n / (i*2)); 

	return count; 
} 

int main() 
{ 
	ull n; 
	cin >> n;
	cout << hello(n); 
	return 0; 
} 


Compiler output:
a.cc:6:1: error: 'ull' does not name a type; did you mean 'll'?
    6 | ull hello(ll n)
      | ^~~
      | ll
a.cc: In function 'int main()':
a.cc:18:9: error: 'ull' was not declared in this scope; did you mean 'll'?
   18 |         ull n;
      |         ^~~
      |         ll
a.cc:19:16: error: 'n' was not declared in this scope
   19 |         cin >> n;
      |                ^
a.cc:20:17: error: 'hello' was not declared in this scope; did you mean 'ftello'?
   20 |         cout << hello(n);
      |                 ^~~~~
      |                 ftello
Language: C++

#include <iostream>

using namespace std;

unsigned long func_calc(unsigned long in)
{
  if (2 < in){
    return 1;
  }else{
    return in*func_calc(in -2);
  }

} 

int main ()
{
  unsigned long a; 
  cin >> a;
  
  unsigned long c = func_calc(a);
  int i=0
  for (i=0;i<10000000000000000){    
 	if (c%10*(i+1) != 0){
      break;
  	}
  }
      
  cout << i;
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:3: error: expected ',' or ';' before 'for'
   22 |   for (i=0;i<10000000000000000){
      |   ^~~
a.cc:22:31: error: expected ';' before ')' token
   22 |   for (i=0;i<10000000000000000){
      |                               ^
      |                               ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> Pii;
typedef pair<ll,ll> Pll;
#define rep(i,n) for (ll i=0;i<(n);++i)
#define rep2(i,a,b) for (ll i=(a);i<(b);++i)
#define debug(x) cout << #x << '=' << x << endl
#define all(v) (v).begin(),(v).end()
const ll MOD=1e9+7;
//const ll MOD=998244353;
const ll INF=1e9;
const ll IINF=1e18;
const double EPS=1e-8;
const double pi=acos(-1);

template<class T> inline bool chmin(T &a,T b){
    if (a>b){a=b; return true;}
    return false;
}
template<class T> inline bool chmax(T &a,T b){
    if (a<b){a=b; return true;}
    return false;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll N,ans=0; cin >> N;
    ll cnt=10,ans=0;
    for (ll i=10;i<=N;i*=5) ans+=N/i;
    if (N%2==1) ans=0;
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:15: error: redeclaration of 'll ans'
   30 |     ll cnt=10,ans=0;
      |               ^~~
a.cc:29:10: note: 'll ans' previously declared here
   29 |     ll N,ans=0; cin >> N;
      |          ^~~
Language: C++




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

#define mod 998244353

long long dp[300001];

int a[300001];

int N;

long long f(int i) {
    stack<int> st;
    
    for(int i = 0; i < N; i++) {
        if(st.size() > 0) {
            if(st.top() % 2 == a[i] % 2) {
                st.pop();
            }else st.push(a[i]);
        }else st.push(a[i]);
    }
    long long cnt = 0;
    while(!st.empty()) {
        if(st.top() % 2) cnt++;
        st.pop();
    }
    return cnt;

}


int main() {
    // oh hi mark
    long double pw = 1;
    long double n; cin >> n;
    long long sum = 0;
    while(n > 1) {
        sum += (long long)(((long long)(n / 5)) / 2);
        n /= 5.0;
    }
    if(n % 2 == 0)
        cout << (long long)sum << endl;
    else cout << 0 << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:44:10: error: invalid operands of types 'long double' and 'int' to binary 'operator%'
   44 |     if(n % 2 == 0)
      |        ~ ^ ~
      |        |   |
      |        |   int
      |        long double
Language: C++

#include <iostream>

using namespace std;

int main ()
{
  unsigned long a; 
  cin >> a;
  
  cout << f(a);
  
  return 0;
}

unsigned long f(unsigned long in)
{
  if (2 < in){
    return 1;
  }else{
    return in*f(in -2);
  }

} 

Compiler output:
a.cc: In function 'int main()':
a.cc:10:11: error: 'f' was not declared in this scope
   10 |   cout << f(a);
      |           ^
Language: C++

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

int main()
{
 long long int x;
  cin>>x;
  
  long long int ans=0,five=0,two=0;
  
  while(x>1)
  {
  if(x%5==0 && x%2==0)
  { 
    ans++;
  } 
    else if(x%5==0 && x%2!=0)
    {five++;
    }
    else if(x%5!=0 && x%2==0
            {two++;}    
    x=x-2;
  }
  ans=ans+min(five,two);
            cout<<ans;
            return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:29: error: expected ';' before '{' token
   20 |     else if(x%5!=0 && x%2==0
      |                             ^
      |                             ;
   21 |             {two++;}
      |             ~                
a.cc:22:10: error: expected ')' before ';' token
   22 |     x=x-2;
      |          ^
      |          )
a.cc:20:12: note: to match this '('
   20 |     else if(x%5!=0 && x%2==0
      |            ^
Language: C++

    #include<iostream>
    #define lli long long int
    using namespace std;
    int main(){
      lli n, five=0, two=0;
      cin>>n;
      if(n%2 !=0){
        cout<<0<<endl;
      }
      else{
        lli p = 10;
        while(n / p ! =0){
        	five += n/p;
          	p = p * 10;
        }
        cout<<five<<endl;
      }
      return 0;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:12:20: error: expected ')' before '!' token
   12 |         while(n / p ! =0){
      |              ~     ^~
      |                    )
a.cc:12:23: error: expected primary-expression before '=' token
   12 |         while(n / p ! =0){
      |                       ^
Language: C++

/*
このコード、と～おれ!
Be accepted!
∧＿∧　
（｡･ω･｡)つ━☆・*。
⊂　　 ノ 　　　・゜+.
　しーＪ　　　°。+ *´¨)
 　　　　　　　　　.· ´¸.·*´¨) ¸.·*¨)
		  　　　　　　　　　　(¸.·´ (¸.·'* ☆
					*/

#include <stdio.h>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstring>
#include <vector>
#include <numeric>
#include <iostream>
#include <random>
#include <map>
#include <unordered_map>
#include <queue>
#include <regex>

#pragma GCC optimize("Ofast")
#define rep(i, n) for(int i = 0; i < (n); ++i)
#define rep1(i, n) for(int i = 1; i <= (n); ++i)
#define rep2(i, n) for(int i = 2; i < (n); ++i)
#define repr(i, n) for(int i = n; i >= 0; --i)
#define reprm(i, n) for(int i = n - 1; i >= 0; --i)
#define printynl(a) printf(a ? "yes\n" : "no\n")
#define printyn(a) printf(a ? "Yes\n" : "No\n")
#define printYN(a) printf(a ? "YES\n" : "NO\n")
#define printin(a) printf(a ? "possible\n" : "inposible\n")
#define printdb(a) printf("%.50lf\n", a)//少数出力
#define printdbd(a) printf("%.16lf\n", a)//少数出力(桁少なめ)
#define prints(s) printf("%s\n", s.c_str())//string出力
#define all(x) (x).begin(), (x).end()
#define allsum(a, b, c) ((a + b) * c / 2)//等差数列の和、初項,末項,項数
#define pb push_back
#define priq priority_queue
#define rpriq priq<int, vector<int>, greater<int>>
#define deg_to_rad(deg) (((deg)/360.0)*2.0*PI)
#define rad_to_deg(rad) (((rad)/2.0/PI)*360.0)
#define Please return
#define AC 0

using ll = long long;

constexpr int INF = 1073741823;
constexpr int MINF = -1073741823;
constexpr ll LINF = ll(4661686018427387903);
constexpr ll MOD = 1000000007;
const double PI = acos(-1);

using namespace std;

void scans(string& str) {
	char c;
	str = "";
	scanf("%c", &c);
	if (c == '\n')scanf("%c", &c);//最初の改行対策
	while (c != '\n' && c != -1) {
		str += c;
		scanf("%c", &c);
	}
}

void scanc(char& str) {
	char c;
	scanf("%c", &c);
	if (c == -1)return;
	while (c == '\n') {
		scanf("%c", &c);
	}	str = c;
}

double acot(double x) {
	return PI / 2 - atan(x);
}

/*-----------------------------------------ここからコード-----------------------------------------*/
ll gcd(ll a, ll b) {
    if (b==0) return a;
    else return gcd(b, a%b);
}

ll lcm(ll number1,ll number2){
	return number1 * number2 / gcd(number1,number2);	
}

int main() {
	
	ll a;
	scanf("%lld", &a);
	ll ans
	if(a % 2 == 0){
	  ll i = 10;
	  while(a / i != 0){
	    ans += a / i;
	    i *= 10;
}
	  printf("%lld\n", ans);
}
	else printf("%lld\n", 0LL);
	
	Please AC;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:98:9: error: expected initializer before 'if'
   98 |         if(a % 2 == 0){
      |         ^~
a.cc:106:9: error: 'else' without a previous 'if'
  106 |         else printf("%lld\n", 0LL);
      |         ^~~~
Language: C++

#include <bits/stdc++.h>
 
using namespace std;
 
int main() {
	long long int n; cin >> n;
  	if (n % 2 != 0) {
    	cout << 0 << endl;
    } else {
      	long long int ans = 0;
    	for (long long int i = 10; i <= n; i *= 5) {
        	ans += n / i;
        }
      	cout << ans << endl;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:15:6: error: expected '}' at end of input
   15 |     }
      |      ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  long long n;
  cin >> n;
  if(n%2==1){
    cout << 0;
  }
  else{
    long long i=0;
    long long q=10
    while(n/q==0){
      i=i+n/q;
      q=q*10;
    }
    cout << i;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: expected ',' or ';' before 'while'
   12 |     while(n/q==0){
      |     ^~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  long long n;
  cin >> n;
  if(n%2==1){
    cout << 0;
  }
  else{
    long long i=0;
    long long q=10
    while(n/q==0){
      i=i+n/q
      q=q*10;
    }
    cout << i;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: expected ',' or ';' before 'while'
   12 |     while(n/q==0){
      |     ^~~~~
Language: C++

n = int(input())

if n % 2 == 1:
    print(0)
    exit(0)

l = []
for i in range(30, 0, -1):
    l.append(2 * (5**i))

here = 0
for i in range(1, len(l)):
    here += (n//l[i] - n//l[i-1]) * (len(l) - i)

print(here)

Compiler output:
a.cc:1:1: error: 'n' does not name a type
    1 | n = int(input())
      | ^
Language: C++

#include <bits/stdc++.h>
#define LLI long long int
#define FOR(v, a, b) for(LLI v = (a); v < (b); ++v)
#define FORE(v, a, b) for(LLI v = (a); v <= (b); ++v)
#define REP(v, n) FOR(v, 0, n)
#define REPE(v, n) FORE(v, 0, n)
#define REV(v, a, b) for(LLI v = (a); v >= (b); --v)
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it)
#define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it)
#define EXIST(c,x) ((c).find(x) != (c).end())
#define fst first
#define snd second
#define popcount __builtin_popcount
#define UNIQ(v) (v).erase(unique(ALL(v)), (v).end())
#define bit(i) (1LL<<(i))

#ifdef DEBUG
#include <misc/C++/Debug.cpp>
#else
#define dump(...) ((void)0)
#endif

#define gcd __gcd

using namespace std;
template <class T> constexpr T lcm(T m, T n){return m/gcd(m,n)*n;}

template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;}
template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;}
template <typename T, typename U> bool chmin(T &a, const U &b){return (a>b ? a=b, true : false);}
template <typename T, typename U> bool chmax(T &a, const U &b){return (a<b ? a=b, true : false);}
template <typename T, size_t N, typename U> void fill_array(T (&a)[N], const U &v){fill((U*)a, (U*)(a+N), v);}

struct Init{
  Init(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(12);
    cerr << fixed << setprecision(12);
  }
}init;


/**
 * @brief a!に素因数pが幾つ含まれるか?
 * @note a=2^63-1, p=2でも64bit整数に収まる。
 */
std::int64_t factorial_prime_factorization(std::int64_t a, std::int64_t p){
  std::int64_t ret = 0, q = p;

  while(q <= a){
    std::int64_t t = a / q;

    ret += t;

    std::int64_t k;
    if(__builtin_smulll_overflow(q, p, &k)) break;
    
    q = k;
  }
  return ret;
}




int main(){
  LLI N;
  while(cin >> N){

    if(N % 2 == 0){
      N /= 2;
      LLI five = factorial_prime_factorization(N, 5);
      LLI two = factorial_prime_factorization(N, 2);
      two += N;

      cout << min(five, two) << endl;
    }else{
      LLI five = factorial_prime_factorization(N, 5);
      LLI two = factorial_prime_factorization(N, 2);

      N /= 2;

      five -= factorial_prime_factorization(N, 5);
      two -= factorial_prime_factorization(N, 2);
      two -= N;

      cout << min(five, two) << endl;
    }
    

    
  }


  return 0;
}


Compiler output:
a.cc: In function 'int64_t factorial_prime_factorization(int64_t, int64_t)':
a.cc:59:40: error: invalid conversion from 'int64_t*' {aka 'long int*'} to 'long long int*' [-fpermissive]
   59 |     if(__builtin_smulll_overflow(q, p, &k)) break;
      |                                        ^~
      |                                        |
      |                                        int64_t* {aka long int*}
<built-in>: note:   initializing argument 3 of 'bool __builtin_smulll_overflow(long long int, long long int, long long int*)'
Language: C++

#include <bits/stdc++.h>

int main(){
    int N, u, v;
    std::cin >> N >> u >> v;
    u--; v--;
    std::vector< std::vector< int > > AB(N);
    for(int i=1; i<N; i++){
        int tmpa, tmpb;
        std::cin >> tmpa >> tmpb;
        tmpa--; tmpb--;
        AB[tmpa].push_back(tmpb);
        AB[tmpb].push_back(tmpa);
    }
    
    std::vector< int > min_dist(N, 1e9);
    std::vector< int > min_route;
    std::deque< int > pos;
    std::deque< int > prepos;
    std::deque< int > dist;
    std::vector< int > route;
    pos.push_back(v);
    prepos.push_back(-1);
    dist.push_back(0);
    
    while(!pos.empty()){
        int c_pos = pos[0];
        int c_prepos = prepos[0];
        int c_dist = dist[0];
        pos.pop_front();
        prepos.pop_front();
        dist.pop_front();
        
        if(min_dist[c_pos] <= c_dist){
            continue;
        }
        
        route.resize(c_dist);
        route.push_back(c_pos)
        
        min_dist[c_pos] = c_dist;
        if(c_pos == u){
            min_route = route;
            break;
        }
        
        for(int i=0; i<AB[c_pos].size(); i++){
            if(AB[c_pos][i] == c_prepos){
                continue;
            }
            pos.push_front(AB[c_pos][i]);
            prepos.push_front(c_pos);
            dist.push_front(c_dist+1);
        }
    }
    
    int center = (min_route.size() % 2 == 0) ? min_route[min_route.size() / 2] : min_route[min_route.size() / 2 + 1];
    int pre_center = (min_route.size() % 2 == 0) ? min_route[min_route.size() / 2 - 1] : min_route[min_route.size() / 2];
    int center_dist = (min_route.size() % 2 == 0) ? min_route.size() / 2 : min_route.size() / 2 + 1;
    
    pos.clear();
    prepos.clear();
    dist.clear();
    pos.push_back(center);
    prepos.push_back(-1);
    dist.push_back(0);
    min_dist.assign(N, 1e9);
    int max_dist = 0;
    
    while(!pos.empty()){
        int c_pos = pos[0];
        int c_prepos = prepos[0];
        int c_dist = dist[0];
        pos.pop_front();
        prepos.pop_front();
        dist.pop_front();
        
        if(c_pos == pre_center){
            continue;
        }
        if(min_dist[c_pos] <= c_dist){
            continue;
        }
        
        min_dist[c_pos] = c_dist;
        if(max_dist < c_dist){
            max_dist = c_dist;
        }
        
        for(int i=0; i<AB[c_pos].size(); i++){
            if(AB[c_pos][i] == c_prepos){
                continue;
            }
            pos.push_back(AB[c_pos][i]);
            prepos.push_back(c_pos);
            dist.push_back(c_dist+1);
        }
    }
    
    std::cout << center_dist + max_dist - 1 << std::endl;
    
    
    return 0;
    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:39:31: error: expected ';' before 'min_dist'
   39 |         route.push_back(c_pos)
      |                               ^
      |                               ;
   40 | 
   41 |         min_dist[c_pos] = c_dist;
      |         ~~~~~~~~
Language: C++

#include <bits/stdc++.h>
#define MAXN 100005
using namespace std;
typedef long long ll;
const int MAXN = 1e5+10;
vector<int>G[MAXN];
int step1[MAXN], step2[MAXN];
bool vis1[MAXN], vis2[MAXN];
int n, s1, s2, u, v;
void bfs(int k) {
    if (k == s1) {
        queue<int>q;
        q.push(k);
        step1[k] = 0;
        vis1[k] = true;
        while (!q.empty()) {
            int a = q.front();
            q.pop();
            for (int b : G[a]) {
                if (!vis1[b]) {
                    step1[b] = step1[a] + 1;
                    vis1[b] = true;
                    q.push(b);
                }
            }
        }
    }
    else if (k == s2) {
        queue<int>q;
        q.push(k);
        step2[k] = 0;
        vis2[k] = true;
        while (!q.empty()) {
            int a = q.front();
            q.pop();
            for (int b : G[a]) {
                if (!vis2[b]) {
                    step2[b] = step2[a] + 1;
                    vis2[b] = true;
                    q.push(b);
                }
            }
        }
    }
}
int main() {
    memset(vis1, false, sizeof(vis1));
    memset(vis2, false, sizeof(vis2));
    memset(step1, 0, sizeof(step1));
    memset(step2, 0, sizeof(step2));
    cin >> n >> s1 >> s2;
    for (int i = 0; i < n - 1; i++) {
        scanf("%d%d", &u, &v);
        G[u].push_back(v);
        G[v].push_back(u);
    }
    bfs(s1);
    bfs(s2);
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        if (step1[i] < step2[i]) ans = max(ans, step2[i]);
    }
    cout << ans - 1;
    return 0;
}


Compiler output:
a.cc:2:14: error: expected unqualified-id before numeric constant
    2 | #define MAXN 100005
      |              ^~~~~~
a.cc:5:11: note: in expansion of macro 'MAXN'
    5 | const int MAXN = 1e5+10;
      |           ^~~~