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

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		ArrayList<Integer> a = new ArrayList<Integer>();
		for (int i = 0; i < n; i++) {
			a.add(sc.nextInt());
		}
		sc.close();

		Collections.sort(a);

		int minIndex;

		while(getSameCardIndex(a) != -1) {

			minIndex = getSameCardIndex(a);

			if(a.size() == minIndex + 2) {
				minIndex--;
			}

			a.remove(minIndex);
			a.remove(minIndex + 1);

		}

		System.out.println(a.size());

	}

	private static int getSameCardIndex(ArrayList<Integer> a) {
		int prev = a.get(0);
		for(int i = 1; i < a.size(); i++) {
			if(a.get(i).equals(prev)) {
				return i - 1;
			}
			prev = a.get(i);
		}
		return -1;
	}

}


Compiler output:
Main.java:34: error: cannot find symbol
	private static int getSameCardIndex(ArrayList<Integer> a) {
	                                    ^
  symbol:   class ArrayList
  location: class Main
Main.java:5: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		                 ^
  symbol:   class Scanner
  location: class Main
Main.java:7: error: cannot find symbol
		ArrayList<Integer> a = new ArrayList<Integer>();
		^
  symbol:   class ArrayList
  location: class Main
Main.java:7: error: cannot find symbol
		ArrayList<Integer> a = new ArrayList<Integer>();
		                           ^
  symbol:   class ArrayList
  location: class Main
Main.java:13: error: cannot find symbol
		Collections.sort(a);
		^
  symbol:   variable Collections
  location: class Main
6 errors
Language: C++

/**
*    created: 31.07.2020 11:19:43
**/
#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
// #include <boost/multiprecision/cpp_int.hpp>
// using bint = boost::multiprecision::cpp_int;
using namespace std;
#define int long long
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep2(i,s,n) for (int i = (s); i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define pcnt(bit) __builtin_popcountll(bit)
template<class T> bool chmax(T &a, const T &b) {if (a < b) {a = b; return 1;} return 0;}
template<class T> bool chmin(T &a, const T &b) {if (b < a) {a = b; return 1;} return 0;}
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
const int dx2[8] = {0, 1, 0, -1, 1, 1,-1, -1};
const int dy2[8] = {1, 0,-1, 0, 1, -1, 1, -1};
const long double pi = acos(-1.0);
const int MAX = 1000010;
const int INF = 1LL << 60;
const int MOD = 1000000007;
// const int MOD = 998244353;

signed main() {

    cin.tie(0);
    ios_base::sync_with_stdio(false);

    int n; cin >> n;
    vector<int> v(n);
    rep(i,n) cin >> v[i];
    sort(all(v));
    v.erase(unique(all(v)), a.end());
    cout << ((v.size() % 2) ? v.size() : v.size() - 1) << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:29: error: 'a' was not declared in this scope
   36 |     v.erase(unique(all(v)), a.end());
      |                             ^
Language: C++

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


#define MOD 1000000007
#define INF 1001001001
#define MIN -1001001001
#define rep(i,k,N) for(int i=k;i<N;i++)
#define MP make_pair
#define MT make_tuple //tie,make_tuple は別物
#define PB push_back
#define PF push_front
#define all(x) (x).begin(),(x).end()


using namespace std;
typedef long long ll;
typedef vector<ll> v;
typedef vector<vector<ll>> vv;

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

int main(){
    ll N;
    cin>>N;
    v A(N);
    rep(i,0,N)cin>>A[i];

    sort(all(A));
    ll sum =0;
    rep(i,1,N){
        if(A[i] == A[i-a1])sum++;
    }
    if(sum%2 == 1)sum++;
    cout<<N-sum;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:24: error: 'a1' was not declared in this scope; did you mean 'y1'?
   42 |         if(A[i] == A[i-a1])sum++;
      |                        ^~
      |                        y1
Language: C++

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

int main(){
  ll a, b, s, n;
  in(n);
  vector<ll> c(n, 0);
  rep(i, n){
    in(a);
    c[a]++;
  }
  sort(all(c));
  a = c[n - 1];
  b = 0;
  rep(i, n)
    b = b + max(c[i] - 1, 0);
  if(a * 2 >= b)
    s = a;
  else
    s = (b + 1) / 2;
  out(s);
  memi;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:16: error: no matching function for call to 'max(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type, int)'
   29 |     b = b + max(c[i] - 1, 0);
      |             ~~~^~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 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:29:16: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   29 |     b = b + max(c[i] - 1, 0);
      |             ~~~^~~~~~~~~~~~~
/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:
/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:29:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   29 |     b = b + max(c[i] - 1, 0);
      |             ~~~^~~~~~~~~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int n,a[101101],ans;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    sort(&a[1],&a[n+1]);
    for(int i=1;i<=n;i++)
    {
        if(a[i]==a[i-1])
            ans++;
    }
    if(ans%2)
        ans++;
    cout<<n-ans<<endl;
    return 0；
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:12: error: unable to find numeric literal operator 'operator""\U0000ff1b'
   20 |     return 0；
      |            ^~~
a.cc:20:15: error: expected ';' before '}' token
   20 |     return 0；
      |               ^
      |               ;
   21 | }
      | ~
Language: C++

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

int main() {
    int N, A_i, k;

    cin >> N;
    set<int> B;

    for(i=0; i<N; i++) {
        cin >> A_i;
        B.insert(A_i);
    }

    k = B.size();

    if(k%2 == 1) {
        cout << k << endl;
    }
    else {
        cout << k-1 << endl;
    }
    
    return 0;
}

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

#include <bits/stdc++.h>
using namespace std;
int n,ans,sum;  
int a[100005],cishu[100005];  
void f(){
    for(int i=1;i<=sum;i++){
    	if(shu[i]>1){
    		ans+=shu[i]-1; 
		}else{
			continue;
		}
	}
    if(ans%2==1){
    	ans+=1;
	}  
    cout<<n-ans<<endl;  
    return ;  
}
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        cishu[a[i]]++;
        if(a[i]>=sum){
        	sum=a[i];
		}
    }
    f();
    return 0;
}

Compiler output:
a.cc: In function 'void f()':
a.cc:7:12: error: 'shu' was not declared in this scope
    7 |         if(shu[i]>1){
      |            ^~~
Language: C++

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

int main(){
  int N;
  cin>>N;
  map<int,int> m;
  for(int i=0;i<N;i++){
    int x;
    cin>>x;
    if(m.count(x)){
      m.at(x)++;
    }else{
      m[x]=0;
    }
  }
  
  int sum=0;
  for(auto i:m){
    sum+=i.second
  }
  
  cout<<sum/2+sum%2<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:20:18: error: expected ';' before '}' token
   20 |     sum+=i.second
      |                  ^
      |                  ;
   21 |   }
      |   ~
Language: C++

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

int main(){
  int N;
  cin>>N;
  map<int,int> m;
  for(int i=0;i<N;i++){
    int x;
    cin>>x;
    if(m.count(x)){
      m.at(x)++;
    }else{
      m[x]=0;
    }
  }
  
  int sum=0;
  for(auto i:m){
    sum+=i
  }
  
  cout<<sum/2+sum%2<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:20:8: error: no match for 'operator+=' (operand types are 'int' and 'std::pair<const int, int>')
   20 |     sum+=i
      |     ~~~^~~
Language: C++

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

int main(){
  int N;
  cin>>N;
  map<int,int> m;
  for(int i=0;i<N;i++){
    int x;
    cin>>x;
    if(m.count(x)){
      m.at(x)++;
    }else{
      m[x]=0;
    }
  }
  
  int sum=0;
  for(int i:m){
    sum=sum+i;
  }
  
  cout<<sum/2+sum%2<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:19:13: error: cannot convert 'std::pair<const int, int>' to 'int' in initialization
   19 |   for(int i:m){
      |             ^
Language: C++

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

int main(){
  int N;
  cin>>N;
  map<int,int> m;
  for(int i=0;i<N;i++){
    int x;
    cin>>x;
    if(m.count(x)){
      m.at(x)++;
    }else{
      m[x]=0;
    }
  }
  
  int sum=0;
  for(auto i:m){
    sum+=i;
  }
  
  cout<<sum/2+sum%2<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:20:8: error: no match for 'operator+=' (operand types are 'int' and 'std::pair<const int, int>')
   20 |     sum+=i;
      |     ~~~^~~
Language: C++

#inlude<bits/stdc++.h>
using namespace std;
int a[100050],n,ans;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
		cin>>a[i];
	sort(a+1,a+n+1);
	for(int i=1;i<=n;i++)
		if(a[i]==a[i-1])
			ans++;
	if(ans%2==1) ans++;
	cout<<n-ans<<endl;
	return 0;
}


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inlude; did you mean #include?
    1 | #inlude<bits/stdc++.h>
      |  ^~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin>>n;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #inlude<bits/stdc++.h>
a.cc:9:9: error: 'sort' was not declared in this scope; did you mean 'short'?
    9 |         sort(a+1,a+n+1);
      |         ^~~~
      |         short
a.cc:14:9: error: 'cout' was not declared in this scope
   14 |         cout<<n-ans<<endl;
      |         ^~~~
a.cc:14:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:14:22: error: 'endl' was not declared in this scope
   14 |         cout<<n-ans<<endl;
      |                      ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #inlude<bits/stdc++.h>
Language: C++

#include<bits/stdc++.h>
#define int long lnog
using namespace std;
const int N=100010;
int n,a[N],ans;
signed main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
        cin>>a[i];
    sort(a+1,a+1+n);
    for(int i=1;i<=n;i++)
        if(a[i]==a[i-1])
			ans++;
    if(ans%2==1)ans++;
    cout<<n-ans<<"\n";
	return 0;
}

Compiler output:
a.cc:4:11: error: expected initializer before 'N'
    4 | const int N=100010;
      |           ^
a.cc:5:5: error: expected initializer before 'n'
    5 | int n,a[N],ans;
      |     ^
a.cc: In function 'int main()':
a.cc:8:10: error: 'n' was not declared in this scope; did you mean 'yn'?
    8 |     cin>>n;
      |          ^
      |          yn
a.cc:9:13: error: expected ';' before 'i'
    9 |     for(int i=1;i<=n;i++)
      |             ^
a.cc:9:13: error: 'i' was not declared in this scope
a.cc:9:21: error: expected ')' before ';' token
    9 |     for(int i=1;i<=n;i++)
      |        ~            ^
      |                     )
a.cc:9:22: error: 'i' was not declared in this scope
    9 |     for(int i=1;i<=n;i++)
      |                      ^
a.cc:11:10: error: 'a' was not declared in this scope
   11 |     sort(a+1,a+1+n);
      |          ^
a.cc:12:13: error: expected ';' before 'i'
   12 |     for(int i=1;i<=n;i++)
      |             ^
a.cc:12:21: error: expected ')' before ';' token
   12 |     for(int i=1;i<=n;i++)
      |        ~            ^
      |                     )
a.cc:15:8: error: 'ans' was not declared in this scope; did you mean 'abs'?
   15 |     if(ans%2==1)ans++;
      |        ^~~
      |        abs
a.cc:16:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   16 |     cout<<n-ans<<"\n";
      |             ^~~
      |             abs
Language: C++

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

int main(){
  ll n; cin >> n;
  vi a(n); rep(i, n) cin >> a[i];
  // unique 真に unique にするための前処理で sort
  sort(all(a));
  a.erase(unique(all(a)), a.end());
  
  int ans = a.size();
  if(ans%2 == 0) ans--;

  std::cout << ans << '\n';
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'll' was not declared in this scope; did you mean 'all'?
    8 |   ll n; cin >> n;
      |   ^~
      |   all
a.cc:8:16: error: 'n' was not declared in this scope; did you mean 'yn'?
    8 |   ll n; cin >> n;
      |                ^
      |                yn
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(false); cin.tie(0);
#define FOR(i,s,n) for(int i = s; i < (n); i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(n) (n).begin(), (n).end()
#define RALL(n) (n).rbegin(), (n).rend()
#define ATYN(n) cout << ( (n) ? "Yes":"No") << endl;
#define CFYN(n) cout << ( (n) ? "YES":"NO") << endl;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;

int main(void)
{
    IOS
    const int N = 1e5+1
    int n; cin >> n;
    vector<int> m(N);
    REP(i,n) {
        int x;
        cin >> x;
        m[x]++;
    }
    int cnt = 0;
    REP(i,N) if (m[i] != 0) cnt++; 

    cout << ( cnt % 2 == 0 ? cnt -1 : cnt ) << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:5: error: expected ',' or ';' before 'int'
   18 |     int n; cin >> n;
      |     ^~~
a.cc:18:19: error: 'n' was not declared in this scope
   18 |     int n; cin >> n;
      |                   ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define MOD 1000000007
#define INF 1000000010
#define EPS 1e-9
#define fst first
#define scd second

#define debug(x) cout<<x<<endl;
#define repi(i,x,n) for(int i=x;i<n;i++)
#define rep(i,n) repi(i,0,n)
#define lp(i,n) repi(i,0,n)
#define repn(i,n) for(int i=n;i>=0;i--)
#define int long long
#define endl "\n"


signed main(){
  cin.tie(0);	
  ios::sync_with_stdio(false);
  int n;
  int a[100000];
  map<int,int> mp;
  int ans=0;
  cin>>n;
  rep(i,a){
    cin>>a[i];
    mp[a[i]]++;
    if(mp[a[i]]%3==2) ans++;
  }
  cout<<ans<<endl;
  

  return 0;
}





Compiler output:
a.cc: In function 'int main()':
a.cc:10:34: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   10 | #define repi(i,x,n) for(int i=x;i<n;i++)
      |                                  ^
a.cc:11:18: note: in expansion of macro 'repi'
   11 | #define rep(i,n) repi(i,0,n)
      |                  ^~~~
a.cc:26:3: note: in expansion of macro 'rep'
   26 |   rep(i,a){
      |   ^~~
Language: C++

#include <bits/stdc++.h>
#define rep(i,a,b) for(ll i=ll(a);i<ll(b);i++)
int a[110000];
map <int,int> b;
int main(){
  int n,c=0,d=0;
  std::cin>>n;
  rep(i,0,n){std::cin>>a[i];b[a[i]]++;}
  rep(i,0,b.size()){
    if(b[i]>0)c++;
    if(b[i]>1)d+=b[i]-1;
  }
  std::cout<<c-d%2;
}


Compiler output:
a.cc:4:1: error: 'map' does not name a type
    4 | map <int,int> b;
      | ^~~
a.cc: In function 'int main()':
a.cc:2:24: error: 'll' was not declared in this scope
    2 | #define rep(i,a,b) for(ll i=ll(a);i<ll(b);i++)
      |                        ^~
a.cc:8:3: note: in expansion of macro 'rep'
    8 |   rep(i,0,n){std::cin>>a[i];b[a[i]]++;}
      |   ^~~
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   rep(i,0,n){std::cin>>a[i];b[a[i]]++;}
      |       ^
a.cc:2:35: note: in definition of macro 'rep'
    2 | #define rep(i,a,b) for(ll i=ll(a);i<ll(b);i++)
      |                                   ^
a.cc:8:29: error: 'b' was not declared in this scope
    8 |   rep(i,0,n){std::cin>>a[i];b[a[i]]++;}
      |                             ^
a.cc:2:24: error: 'll' was not declared in this scope
    2 | #define rep(i,a,b) for(ll i=ll(a);i<ll(b);i++)
      |                        ^~
a.cc:9:3: note: in expansion of macro 'rep'
    9 |   rep(i,0,b.size()){
      |   ^~~
a.cc:9:7: error: 'i' was not declared in this scope
    9 |   rep(i,0,b.size()){
      |       ^
a.cc:2:35: note: in definition of macro 'rep'
    2 | #define rep(i,a,b) for(ll i=ll(a);i<ll(b);i++)
      |                                   ^
a.cc:9:11: error: 'b' was not declared in this scope
    9 |   rep(i,0,b.size()){
      |           ^
a.cc:2:40: note: in definition of macro 'rep'
    2 | #define rep(i,a,b) for(ll i=ll(a);i<ll(b);i++)
      |                                        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
const int maxn=100000+10;
int a[maxn],n,vis[maxn];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
		if(!vis[a[i]]) vis[a[i]]++,ans++;	
	}
	if(ans%2) cout<<ans;
	else cout<<ans-1;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:44: error: 'ans' was not declared in this scope; did you mean 'abs'?
   10 |                 if(!vis[a[i]]) vis[a[i]]++,ans++;
      |                                            ^~~
      |                                            abs
a.cc:12:12: error: 'ans' was not declared in this scope; did you mean 'abs'?
   12 |         if(ans%2) cout<<ans;
      |            ^~~
      |            abs
Language: C++

#include<bits/stdc++.h>
using namespace std;
const ll maxn=100000+10;
int a[maxn],n,vis[maxn];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
		if(!vis[a[i]]) vis[a[i]]++,ans++;	
	}
	if(ans%2) cout<<ans;
	else cout<<ans-1;
	return 0;
}

Compiler output:
a.cc:3:7: error: 'll' does not name a type
    3 | const ll maxn=100000+10;
      |       ^~
a.cc:4:7: error: 'maxn' was not declared in this scope
    4 | int a[maxn],n,vis[maxn];
      |       ^~~~
a.cc:4:19: error: 'maxn' was not declared in this scope
    4 | int a[maxn],n,vis[maxn];
      |                   ^~~~
a.cc: In function 'int main()':
a.cc:9:22: error: 'a' was not declared in this scope
    9 |                 cin>>a[i];
      |                      ^
a.cc:10:21: error: 'vis' was not declared in this scope
   10 |                 if(!vis[a[i]]) vis[a[i]]++,ans++;
      |                     ^~~
a.cc:10:44: error: 'ans' was not declared in this scope; did you mean 'abs'?
   10 |                 if(!vis[a[i]]) vis[a[i]]++,ans++;
      |                                            ^~~
      |                                            abs
a.cc:12:12: error: 'ans' was not declared in this scope; did you mean 'abs'?
   12 |         if(ans%2) cout<<ans;
      |            ^~~
      |            abs
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define vd(T) vector<vector<T>>
#define v(T) vector<T>
#define mod (ll)(1e9+7)
#define pp(T) pair<T,T>
#define pb push_back
#define mp make_pair
#define NN 100005
#define IO ios_base::sync_with_stdio(NULL),cin.tie(0),cout.tie(0)
#define loop(i,a,b) for(ll i=a;i<b;i++)
#define DEBUG cout<<"***********DEBUGGING***********"<<endl
#include <ext/pb_ds/assoc_container.hpp> // Common file 
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds; 
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; 
ll power(ll a,ll b){ if(b==0) return 1; ll s=power(a,b/2); s*=s;if(b&1) return s*a; return s;}
ll powermod(ll a,ll b,ll m){ if(b==0) return 1; ll s=power(a,b/2);s*=s; s%=m; if(b&1) return (s*a)%m; return s;}
inline int add(ll a,ll b,ll m=0){
    if(m==0) return a+b;
    return (a%m+b%m)%m;
}

inline int sub(ll a,ll b ,ll m=0){
    if(m==0) return a-b;
    return ((a%m-b%m)%m+m)%m;
}

inline int mul(ll a,ll b,ll m=0){
    if(m==0)return (a*b);
    return ((a%m)*(b%m))%m;
}

inline int div(ll a,ll b,ll m=0){
    if(m==0) return a/b;
    return ((a%m)*(powermod(a,b,m-2)%m))%m;
}

bool isopen(char c){
    return ((c=='(')||(c=='{')||(c=='['));
}

ll longest_balanced_parenthesis(string a,ll n){
    stack<char> s;
    ll start=0;
    ll ans=0,m=0;
    for(ll i=0;i<n;i++){
        if(isopen(a[i])){
            s.push(a[i]);
        }
        else{
            if(isopen(a[i])|| s.empty()){
                m=max(m,ans);
                continue;
            }
            else{
                s.pop();
                ans+=2;
                m=max(ans,m);
            }
        }
    }

    return m;

}

ll setup_k(ll *a,ll k){
  ordered_set x;
  // Now , insert and then check number of integers less than k by just using x.order_of_key(k+1)
}

int main() {

    IO; 

    ll n;
    cin>>n;
    ll a[n];
    map<ll,ll> m;
    for(ll i=0;i<n;i++){
        cin>>a[i];
        m[a[i]]++;
    }
    sort(a,a+n);
    if(n==1){
        cout<<1<<edl;
        return 0;
    }
    
    ll ans=0;
    for(auto i:m){
        ans+=i.second-1;
    }
        if(ans%3==0)cout<<n-ans<<endl;
        else if(ans%3==1) cout<<n-ans-1<<endl;
        else cout<<n-ans<<endl;
}


Compiler output:
a.cc: In function 'long long int setup_k(long long int*, long long int)':
a.cc:72:1: warning: no return statement in function returning non-void [-Wreturn-type]
   72 | }
      | ^
a.cc: In function 'int main()':
a.cc:88:18: error: 'edl' was not declared in this scope
   88 |         cout<<1<<edl;
      |                  ^~~
Language: C++

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

int main() {
  int n, i, count = 0;
  cin >> n;
  
  vevtor<int> a(n);
  for(i = 0; i < n; i++){
    cin >> a.at(i);
  }
  
  for(i = 0; i < n - 1; i++){
    if(a.at(i) == a.at(i + 1)){
      count++;
    }
  }
  
  cout << (count + 1) / 2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'vevtor' was not declared in this scope
    8 |   vevtor<int> a(n);
      |   ^~~~~~
a.cc:8:10: error: expected primary-expression before 'int'
    8 |   vevtor<int> a(n);
      |          ^~~
a.cc:10:12: error: 'a' was not declared in this scope
   10 |     cin >> a.at(i);
      |            ^
a.cc:14:8: error: 'a' was not declared in this scope
   14 |     if(a.at(i) == a.at(i + 1)){
      |        ^
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<n;i++)
long long inf=(long long)1E17;
#define i_7 (long long)(1E9+7)
long mod(long a){
    long long c=a%i_7;
    if(c>=0)return c;
    return c+i_7;
}
using namespace std;
long long gcd(long long a, long long b){
  if(a<b){
    swap(a,b);
  }
  if(a%b==0){
    return b;
  }else{
    return gcd(b,a%b);
  }
}
 
long long lcm(long long x, long long y){
  return (x/gcd(x,y))*y;
}
 
class UnionFind {
    public:
    //各頂点の親の番号を格納する。その頂点自身が親だった場合は-(その集合のサイズ)を入れる。
    vector<int> Parent;
    
    //クラスを作るときは、Parentの値を全て-1にする。
    //以下のようにすると全てバラバラの頂点として解釈できる。
    UnionFind(int N) {
        Parent = vector<int>(N, -1);
    }
    
    //Aがどのグループに属しているか調べる
    int root(int A) {
        if (Parent[A] < 0) return A;
        return Parent[A] = root(Parent[A]);
    }
    
    //自分のいるグループの頂点数を調べる
    int size(int A) {
        return -Parent[root(A)];//先祖をrootで取っておきたい。
    }
    
    //AとBをくっ付ける
    bool connect(int A, int B) {
        //AとBを直接つなぐのではなく、root(A)にroot(B)をくっつける
        A = root(A);
        B = root(B);
        if (A == B) {
            //すでにくっついてるからくっ付けない
            return false;
        }
        
        //大きい方(A)に小さいほう(B)をくっ付けたい
        //大小が逆だったらAとBをひっくり返す。
        if (size(A) < size(B)) swap(A, B);
        
        //Aのサイズを更新する
        Parent[A] += Parent[B];
        //Bの親をAに変更する
        Parent[B] = A;
        
        return true;
    }
};
 
int main(){
  int nmax=100010;
  int n;
  cin>>n;
  int a[n];
  vector<int> counter(100010,0);
  REP(i,n){
    cin>>a[i];
    counter[a[i]]++;
  }
  int even=0;
  int ans=0
  REP(i,nmax){
    if(i%2==1){
      ans++;
    }else if(i==0){
      continue;
    }else{
      even++;
    }
  }
  if(even%2==0){
    ans += even;
  }else{
    ans += even-1;
  }
  cout<<ans<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:2:18: error: expected ',' or ';' before 'for'
    2 | #define REP(i,n) for(int i=0;i<n;i++)
      |                  ^~~
a.cc:83:3: note: in expansion of macro 'REP'
   83 |   REP(i,nmax){
      |   ^~~
a.cc:83:7: error: 'i' was not declared in this scope
   83 |   REP(i,nmax){
      |       ^
a.cc:2:30: note: in definition of macro 'REP'
    2 | #define REP(i,n) for(int i=0;i<n;i++)
      |                              ^
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<n;i++)
long long inf=(long long)1E17;
#define i_7 (long long)(1E9+7)
long mod(long a){
    long long c=a%i_7;
    if(c>=0)return c;
    return c+i_7;
}
using namespace std;
long long gcd(long long a, long long b){
  if(a<b){
    swap(a,b);
  }
  if(a%b==0){
    return b;
  }else{
    return gcd(b,a%b);
  }
}
 
long long lcm(long long x, long long y){
  return (x/gcd(x,y))*y;
}
 
class UnionFind {
    public:
    //各頂点の親の番号を格納する。その頂点自身が親だった場合は-(その集合のサイズ)を入れる。
    vector<int> Parent;
    
    //クラスを作るときは、Parentの値を全て-1にする。
    //以下のようにすると全てバラバラの頂点として解釈できる。
    UnionFind(int N) {
        Parent = vector<int>(N, -1);
    }
    
    //Aがどのグループに属しているか調べる
    int root(int A) {
        if (Parent[A] < 0) return A;
        return Parent[A] = root(Parent[A]);
    }
    
    //自分のいるグループの頂点数を調べる
    int size(int A) {
        return -Parent[root(A)];//先祖をrootで取っておきたい。
    }
    
    //AとBをくっ付ける
    bool connect(int A, int B) {
        //AとBを直接つなぐのではなく、root(A)にroot(B)をくっつける
        A = root(A);
        B = root(B);
        if (A == B) {
            //すでにくっついてるからくっ付けない
            return false;
        }
        
        //大きい方(A)に小さいほう(B)をくっ付けたい
        //大小が逆だったらAとBをひっくり返す。
        if (size(A) < size(B)) swap(A, B);
        
        //Aのサイズを更新する
        Parent[A] += Parent[B];
        //Bの親をAに変更する
        Parent[B] = A;
        
        return true;
    }
};
 
int main(){
  int n;
  cin>>n;
  int a[n];
  vector<int> counter(100010,0);
  REP(i,n){
    cin>>a[i];
    counter[a[i]]++;
  }
  int even=0;
  int ans=0
  REP(i,100010){
    if(i%2==1){
      ans++;
    }else if(i==0){
      continue;
    }else{
      even++;
    }
  }
  if(even%2==0){
    ans += even;
  }else{
    ans += even-1;
  }
  cout<<ans<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:2:18: error: expected ',' or ';' before 'for'
    2 | #define REP(i,n) for(int i=0;i<n;i++)
      |                  ^~~
a.cc:82:3: note: in expansion of macro 'REP'
   82 |   REP(i,100010){
      |   ^~~
a.cc:82:7: error: 'i' was not declared in this scope
   82 |   REP(i,100010){
      |       ^
a.cc:2:30: note: in definition of macro 'REP'
    2 | #define REP(i,n) for(int i=0;i<n;i++)
      |                              ^
Language: C++

#include <iostream>
#include <utility>
#include <vector>
using namespace std;
#define ll long long

int main () {
  ll n;
  cin >> n;
  ll a[n];
  for (ll i = 0; i < n; i++) {
    cin >> a[i];  
  }    
  sort(a, a + n);
  vector<pair<ll, ll> > box;
  ll now = 0;
  ll num = 0;
  for (ll i = 0; i < n; i++) {
    if (i == 0) {
      now = a[i];
      num++;  
    }    
    else {
      if (now != a[i]) {
        box.push_back(make_pair(num, now));
        now = a[i];
        num = 1;  
      }
      else {
        num++;  
      }
    }
    if (i == n - 1) {
      box.push_back(make_pair(num, now));  
    }
  }
  sort(box.begin(), box.end());
  for (ll i = 0; i < box.size(); i++) {
    ll j = box.size() - 1 - i;
    if (box[j].first >= 2) {
      box[j].first = box[j].first % 2;
      if (box[j].first == 0) {
        box[j].first = 2;  
      }  
    }  
  }
  sort(box.begin(), box.end());
  ll two = 0;
  for (ll i = 0; i < box.size(); i++) {
    if (box[i].first == 2) {
      two++;  
    }
  }
  cout << box.size() - (two % 2) << endl;
}

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

#include<cstdio>
#include<iostream>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<set>
#define ll long long
using namespace std;
int main()
{
    int n;
    set<int>s;
    cin>>n;
    for(int i = 0; i < n; i++){
        int t;
        cin>>t;
        s.insert(t);
    }
    int num = s.size();
    int ans;
    if(more % 2 != 0)ans = num+1;
    else ans = num;
    cout<<ans;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:8: error: 'more' was not declared in this scope
   21 |     if(more % 2 != 0)ans = num+1;
      |        ^~~~
Language: C++

/*g++ file.cpp -o file.out*/
/*./file.out*/

#include <cmath>
#include <queue>
#include <stack>
#include <cstdio>
#include <string>
#include <vector>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;

#define LL long long
#define Mod 1000000007
#define L_Mod 17100000013

#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i))
#define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i))

int a[100005];

int main()
{
    int sov,tmp;
    scanf("%d",&sov);
    rep(i,sov){scanf("%d",&tmp);a[tmp]++;}
    rer(i,0,100000){sov-=(a[i]-1);}
    printf("%d\n",sov);
    return0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:5: error: 'return0' was not declared in this scope
   32 |     return0;
      |     ^~~~~~~
Language: C++

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

int arr[100005];
int main(){
    int n, x;
    scanf("%d",&n);
    for(int i=0;i<n;i++){
        scanf("%d",&x);
        if(!arr[x]){
            arr[x] = 1;
            cnt++;// 记录不重复的数字
        }
    }
    printf("%d\n",(n-cnt)&1?cnt-1:cnt);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:13: error: 'cnt' was not declared in this scope; did you mean 'int'?
   13 |             cnt++;// 记录不重复的数字
      |             ^~~
      |             int
a.cc:16:22: error: 'cnt' was not declared in this scope; did you mean 'int'?
   16 |     printf("%d\n",(n-cnt)&1?cnt-1:cnt);
      |                      ^~~
      |                      int
Language: C++

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

int arr[100005];
int main(){
    int N, x;
    scanf("%d",&n);
    for(int i=0;i<n;i++){
        scanf("%d",&x);
        if(!arr[x]){
            arr[x] = 1;
            cnt++;// 记录不重复的数字
        }
    }
    printf("%d\n",(n-cnt)&1?cnt-1:cnt);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: 'n' was not declared in this scope
    8 |     scanf("%d",&n);
      |                 ^
a.cc:13:13: error: 'cnt' was not declared in this scope; did you mean 'int'?
   13 |             cnt++;// 记录不重复的数字
      |             ^~~
      |             int
a.cc:16:22: error: 'cnt' was not declared in this scope; did you mean 'int'?
   16 |     printf("%d\n",(n-cnt)&1?cnt-1:cnt);
      |                      ^~~
      |                      int
Language: Java

import java.util.*;

public class Main {
	
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
      HashSet<Integer> set = new HashSet<>();
      int count = 0;
      for (int i = 0; i < n; i++){
        int x = sc.nextInt();
        if (set.contains(x)){
          count++;
        } else {
          set.add(x);
      Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
      HashSet<Integer> set = new HashSet<>();
      int count = 0;
      for (int i = 0; i < n; i++){
        int x = sc.nextInt();
        if (set.contains(x)){
          count++;
        } else {
          set.add(x);
          }
        }
      count++;
      count = count / 2 * 2;
        System.out.println(n - count);
	}
}
    }
        }
      count++;
      count = count / 2 * 2;
        System.out.println(n - count);
	}
}


Compiler output:
Main.java:35: error: class, interface, enum, or record expected
      count++;
      ^
Main.java:36: error: class, interface, enum, or record expected
      count = count / 2 * 2;
      ^
Main.java:37: error: class, interface, enum, or record expected
        System.out.println(n - count);
        ^
Main.java:38: error: class, interface, enum, or record expected
	}
	^
4 errors
Language: C++

import collections

N = int(input())
A = [int(i) for i in input().split()]

con = collections.Counter(A)

ans = len(set(A))

tmp = 0

for i in con.values():
    if i % 2 == 0:
        tmp += 1
        
if tmp % 2 != 0:
    ans -= 1
    
print(ans)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import collections
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include<iostream>
#include<algorithm>
#include<string>
#include<math.h>
#include<cmath>
#include<vector>
#include<stack>
#include<queue>
#include<functional>
#include<map>
#include<set>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define ll long long
int main(){
	int n;
	cin >> n;
	int a[(int)1e5+1]={};

	int tmp,ans=0;
	for(int i=0;i<n;i++){
		cin >> tmp;
		a[tmp]++;
		if(a[tmp] == 1) ans++;
	}
	int amari=0;
	for(int i=1;i<=(int)1e5;i++){
		if(a[i] >= 3){
			a[i] -= ((a[i]-1)/2)*2;
		}
		if(a[i] == 2) amari++;
	}
	cout << ans-(amari%2 == 1) << "\n";

	return 0;


Compiler output:
a.cc: In function 'int main()':
a.cc:35:18: error: expected '}' at end of input
   35 |         return 0;
      |                  ^
a.cc:15:11: note: to match this '{'
   15 | int main(){
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n;cin >> n;
	vector<int> cnt(100001);
	rep(i,n){
		int a;
		cin >> a;
		cnt[a]++;
	}
	int ans=0,two=0;
	rep(i,100001){
		if(cnt[i]>2){
			if(cnt[i]%2==1) cnt[i]=1;
			else cnt[i]=2;
		}
		if(cnt[i]==2){
			two++;
			ans++;
		}
		else if(cnt[i]==1) ans++;
	}
	if(two==0){
		cout << ans << emdl;
		return 0;
	}
	if(two%2==1){
		ans--;
		cout << ans << endl;
	}
	else{
		bool find=false;
		rep(i,10001){
			if(cnt[i]==2){
				for(int j=i+1;j<100001;++j){
					if(cnt[j]==1){
						find=true;
						break;
					}
					if(cnt[j]==2){
						i=j-1;
						break;
					}
				}
			}
		}
		if(find) cout << ans << endl;
		else cout << ans-2 << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:32: error: 'emdl' was not declared in this scope
   32 |                 cout << ans << emdl;
      |                                ^~~~
Language: Java

import java.util.LinkedList;
import java.util.Scanner;

public class Cards {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);
		LinkedList<Integer> l = new LinkedList<Integer>();
		int x = scan.nextInt();
		int counter = 0;
		for (int i = 0; i < x; i++) {
			int z = scan.nextInt();
			if (l.contains(z)) {
				counter++;
			} else {
				l.add(z);
			}
		}
		if(counter%2 == 1) {
			counter++;
		}
		System.out.print(x - counter);
	}

}


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

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Stack;
import javax.swing.ScrollPaneConstants;

import org.omg.Messaging.SyncScopeHelper;

public class Solution {
static	Scanner input = new Scanner(System.in);


	public static void main(String[] args) {
		int n = input.nextInt();
		int[] a  = new int [n];
		
		for (int i = 0 ; i < n ; i++) 
			a[i] = input.nextInt();
		
		int [] freq = new int [100000];
		
		for (int i = 0 ; i < n ; i++) {
			freq[a[i]]++;
		}
		
		Arrays.sort(freq);
		int sum = 0;
		int unique = 0 ;
		
		for (int i = 100000-1; i >= 0 ; i--) {
			if (freq[i]==0) {
				break;
			}
			unique++;
			
			sum+=(freq[i]-1);

			
			
		}
		if (sum%2==1) {
			unique-=1;
		}
		System.out.println(unique);
		
		
		
		
		
		
		
	
		
	}
}



Compiler output:
Main.java:11: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
Main.java:9: error: package org.omg.Messaging does not exist
import org.omg.Messaging.SyncScopeHelper;
                        ^
2 errors
Language: Java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Stack;
import javax.swing.ScrollPaneConstants;
import javax.swing.text.AbstractDocument.LeafElement;

public class main {

	static	Scanner input = new Scanner(System.in);


	public static void main(String[] args) {
	
		int n = input.nextInt();
		int[] a  = new int [n];
		
		for (int i = 0 ; i < n ; i++) 
			a[i] = input.nextInt();
		
		int [] freq = new int [100000];
		
		for (int i = 0 ; i < n ; i++) {
			freq[a[i]]++;
		}
		
		Arrays.sort(freq);
		int sum = 0;
		int unique = 0 ;
		
		for (int i = 100000-1; i >= 0 ; i--) {
			if (freq[i]==0) {
				break;
			}
			unique++;
			
			sum+=(freq[i]-1);

			
			
		}
		if (sum%2==1) {
			unique-=1;
		}
		System.out.println(unique);
		
		
		
		
		}	
	}




Compiler output:
Main.java:10: error: class main is public, should be declared in a file named main.java
public class main {
       ^
1 error
Language: C++

#include <bits/stdc++.h>

using namespace std;
int a[1000005];
int n,sum;
int cmp(int a,int b)
{
    return a>b;
}
int main()
{
    int x;
    int t=0;
    cin>>n;
    for(int i=0; i<n; i++)
    {
        cin>>x;
        a[x]++;
    }
    int cnt=t;
    //cout<<t<<endl;
    for(int i=0; i<100000; i++)
    {
        if(a[i])
            cnt++:
        int j,k;
        if(a[i]>1)
        {
            /*if(a[i+1]>1)
            {
                if(a[i+1]<a[i])
                {
                    a[i]=a[i]-(a[i+1]-1);
                    a[i+1]=1;
                    //cout<<a[i]<<a[i+1]<<endl;
                }
                else if(a[i+1]==a[i])
                {
                    a[i]=1;
                    a[i+1]=1;
                    continue;
                }
                else
                {
                    a[i]=1;
                    a[i+1]-=(a[i]-1);
                    continue;
                }
            }*/
                int q=0;
                for(j=i+1; j<100000; j++)
                {
                    if(a[j]>1)
                    {
                        if(a[j]<a[i])
                        {
                            a[j]=1;
                            a[i]-=(a[j]-1);
                        }
                        else if(a[j]==a[i])
                        {
                            a[i]=1;
                            a[j]=1;
                            break;
                        }
                        else
                        {
                            a[i]=1;
                            a[j]-=(a[i]-1);
                            break;;
                        }
                    }
                }
                if(a[i]>1)
                {
                    if(a[i]>=3)
                    {
                        if(a[i]%2==0)
                        {
                            a[i]=2;
                            cnt--;
                        }
                        else
                        {
                            a[i]=1;
                        }
                    }
                    else
                    {
                        cnt--;
                    }
                }
            
            /*cout<<"*************"<<endl;
            for(j=0; j<100000; j++)
            {
                if(a[j]>0)
                {
                    cout<<a[j]<<endl;
                }
            }*/
        }
    }
    cout<<cnt<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:18: error: expected ';' before ':' token
   25 |             cnt++:
      |                  ^
      |                  ;
a.cc:51:21: error: 'j' was not declared in this scope
   51 |                 for(j=i+1; j<100000; j++)
      |                     ^
Language: C++

#include<iostream>
#include<map>
using namespace std;
int main(){
 int n,sum=0,a[100000];
 map<int,bool> m={};
 cin>>n;
 for(int i=0;i<n;i++){
  cin>>a[i];
  if(!m[a[i]]){
    m[a[i]]=true;
    sum++;
  }
 cout<<(sum%2==0?sum:sum-1);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:2: error: expected '}' at end of input
   15 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <stdio.h>

 
int main(void) {
	// your code goes here
	int d[10000];
	int N;
	scanf("%d",N);
	for(int i = 0; i < N; i++)scanf("%d",d[i]);
	sort(d, d+N);
	int ln = -1;
	int cout;
	for(int i = 0; i < N; i++)if(ln == d[i])cout++;
	if(cout % 2 != 0)printf("%d",cout);
	if(cout % 2 == 0)printf("%d",cout-1);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   10 |         sort(d, d+N);
      |         ^~~~
      |         short
Language: C++

#include <iostream>
#include <algorithm>
using namespace std ;
int main(int argc, char** argv) {
	int n , elements ;
	cin >> n ;
	int arr[n] ;
	for ( int i = 0 ; i < n ; i++ ) {
		cin >> arr[i] ;
	}
	sort ( arr , arr + n ) ;
	elements = unique( arr , arr + n ) - arr ;
	if ( elements % 2 == 0 ) {
		elements -- ;
	}
	cout << elements
    return 0;
}

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:16:25: error: expected ';' before 'return'
   16 |         cout << elements
      |                         ^
      |                         ;
   17 |     return 0;
      |     ~~~~~~
Language: C++

#include <Bits/stdc++.h>
using namespace std ;
int main(int argc, char** argv) {
	int n , elements ;
	cin >> n ;
	int arr[n] ;
	for ( int i = 0 ; i < n ; i++ ) {
		cin >> arr[i] ;
	}
	sort ( arr , arr + n ) ;
	elements = unique( arr , arr + n ) - arr ;
	cout << elements ;
    return 0;
}

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

#include <bits/stdc++.h>

using namespace std;
int ar[1000000],cc[100050];
vector<pair<int,int> > gg[100050];
map<int,int> o;
int main()
{
int n;
cin>>n;
for(int i=0;i<n;i++){
cin>>ar[i];
cc[ar[i]]++;
}
sort(ar,ar+n);
long long h=0,l=0;
for(int i=0;i<100050;i++){
        int x;
        if(cc[i]!=0){
if(cc[i]%2==0)
h++;
else
l++


        }
}

if(h%2==0)
cout<<l+h;
else
    cout<<l+h-1;






    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:4: error: expected ';' before '}' token
   23 | l++
      |    ^
      |    ;
......
   26 |         }
      |         ~
Language: Java


import java.util.Scanner;

import java.math.*;

public class Solve {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		int counter = 0;
		int[] array = new int[N];
		for (int i = 0; i < N; i++) {

			array[i] = scan.nextInt();
		}

		Solve s = new Solve();
		array = s.sort(array);
		for (int i = 0; i < N - 1; i++) {

			if (array[i] == array[i + 1]) {

				array[i + 2] = array[i + 1];
				array[i] = 0;
				array[i + 1] = 0;
				i = i + 2;

				counter++;
				counter++;

			}
		}
		System.out.println(N - counter);

	}

	int[] spare;

	public int[] sort(int[] array) {

		spare = array;
		quickSort(spare, 0, spare.length - 1);

		return spare;
	}

	public void quickSort(int[] array, int low, int high) {

		if (low < high) {

			int p = partition(array, low, high);
			quickSort(array, low, p - 1);
			quickSort(array, p + 1, high);
		}
	}

	public int partition(int[] array, int low, int high) {
		int pivot = array[low];
		int left = low + 1;

		int right = high;
		while (true) {

			while (array[left] <= pivot && left < high) {
				left = left + 1;
			}
			while (array[right] >= pivot && right > low) {
				right = right - 1;
			}

			if (left >= right) {

				int temp = array[low];
				array[low] = array[right];
				array[right] = temp;

				return right;
			}

			int temp = array[left];
			array[left] = array[right];
			array[right] = temp;

		}

	}

}


Compiler output:
Main.java:6: error: class Solve is public, should be declared in a file named Solve.java
public class Solve {
       ^
1 error
Language: C++

// 170516.cpp : コンソール アプリケーションのエントリ ポイントを定義します。
//

#include "stdafx.h"
#include <iostream>
#include <vector>
using namespace std;

int main()
{
	int N; cin >> N;
	vector<int>A(N);
	vector<int>cnt(100001);
	for (int i = 0; i < N; i++) {
		cin >> A[i];
		cnt[A[i]]++;
	}
	int cnt2 = 0;
	int ans = 0;
	for (int i = 0; i < 100001; i++) {
		while (cnt[i] >= 3)cnt[i] -= 2;

		if (cnt[i] == 2) {
			ans++;
			cnt2++;
		}
		else if (cnt[i] == 1)ans++;
	}
	if (cnt2 % 2)ans--;

	cout << ans << endl;

    return 0;
}



Compiler output:
a.cc:4:10: fatal error: stdafx.h: No such file or directory
    4 | #include "stdafx.h"
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include<cstdio>
#include<vector>
#include<iostream>
using namespace std;
int gcd(int a,int b){if(a<b){swap(a,b);}if(b==0){return a;}return gcd(a%b,b);}
int main(void){
	int N,i,q,am=0;
	vector<bool> a;
	scanf("%d",&N);
	ans.resize(100000);
	for(;N>0;N--){
		scanf("%d",&q);
		if(a[q]){am++;}
		a[q]=true;
	}
	if(am%2){am++;}
	cout<<(N-am)<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   10 |         ans.resize(100000);
      |         ^~~
      |         abs
Language: C++

#include<cstdio>
#include<algorithm>
#include<vetor>

int N;
std::vector<int> A;
int lgd = 0;
int lg, cnt = 0, ans, in;

int main(){

  scanf("%d", &N);
  ans = N;
  for(int l = 0; l < N; l++){
    scanf("%d", &in);
    A.push_back(in);
  }

  std::sort(A.begin(), A.end());

  lg = A[0];
  for(int l = 1; l < N; l++){
    if(lg == A[l]){
      cnt++;
    }else{
      lg = A[l];

      if(cnt % 2 == 1){
        ans -= (cnt - 1);
      }else{
        lgd++;
      }

    }
  }

  printf("%d", ans - lgd);

}


Compiler output:
a.cc:3:9: fatal error: vetor: No such file or directory
    3 | #include<vetor>
      |         ^~~~~~~
compilation terminated.