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

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

using namespace std;

vector<int> bi;
int pa;

//0~pa-1を長さnで生成、合計pa^n個生成
void bitgen(int n, int ma) {

	//生成完了時の処理
	if (n == 0) {
		for (int i = pa-1;i >= 0;i--) cout << (char)('a' + bi[i]);
		cout << endl;

		return;
	}

	//再帰部分
	for (int i = 0;i <= ma+1;i++) {
		bi[n - 1] = i;
		ma = max(ma, i);
		bitgen(n - 1);
	}
}

int main() {

	int n;
	cin >> n;
	pa = n;

	bi.resize(n+1, 0);
	bitgen(n, -1);

}


Compiler output:
a.cc: In function 'void bitgen(int, int)':
a.cc:24:23: error: too few arguments to function 'void bitgen(int, int)'
   24 |                 bitgen(n - 1);
      |                 ~~~~~~^~~~~~~
a.cc:10:6: note: declared here
   10 | void bitgen(int n, int ma) {
      |      ^~~~~~
Language: C++

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

signed main(){
  int n; cin >> n;
  n--;
  vector<string> now{"a"};
  while(n--){
    vector<string> next;
    for(auto const &s: now){
      int c = *max_element(s.begin(),s.end()) - 'a';
      for(int i=0; i < c+1; i++){
        next.push_back(s + (char)(i + 'a'));
      }
    }
    now = next;
  }
  
  sort(now.begin(), now.end());
  for(auto const &s: now) cout << s << endl;
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:16: error: 'max_element' was not declared in this scope
   13 |       int c = *max_element(s.begin(),s.end()) - 'a';
      |                ^~~~~~~~~~~
a.cc:21:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   21 |   sort(now.begin(), now.end());
      |   ^~~~
      |   short
Language: C++

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

signed main(){
  int n; cin >> n;
  n--;
  vertor<string> now{"a"};
  while(n--){
    vector<string> next;
    for(auto const &s: now){
      int c = *max_element(s.begin(),s.end()) - 'a';
      for(int i=0; i < c+1; i++){
        next.push_back(s + (char)(i + 'a'));
      }
    }
    now = next;
  }
  
  sort(now.begin(), now.end());
  for(auto const &s: now) cout << s << endl;
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'vertor' was not declared in this scope; did you mean 'perror'?
    9 |   vertor<string> now{"a"};
      |   ^~~~~~
      |   perror
a.cc:9:16: error: expected primary-expression before '>' token
    9 |   vertor<string> now{"a"};
      |                ^
a.cc:9:18: error: 'now' was not declared in this scope
    9 |   vertor<string> now{"a"};
      |                  ^~~
a.cc:13:16: error: 'max_element' was not declared in this scope
   13 |       int c = *max_element(s.begin(),s.end()) - 'a';
      |                ^~~~~~~~~~~
a.cc:21:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   21 |   sort(now.begin(), now.end());
      |   ^~~~
      |   short
Language: C++

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

signed main(){
  int n; cin >> n;
  n--;
  vertor<string> now{"a"};
  while(n--){
    vector<string> next;
    for(auto const &s: now){
      int c = *max_element(s.begin(),s.end()) - 'a';
      for(int i=0; i < c+1; i++){
        next.push_back(s + (char)(i + 'a'));
      }
    }
    now = next;
  }
  
  sort(now.begin(), now.end());
  for(auto const &s: now) cout << s << endl;
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'vertor' was not declared in this scope; did you mean 'perror'?
    8 |   vertor<string> now{"a"};
      |   ^~~~~~
      |   perror
a.cc:8:16: error: expected primary-expression before '>' token
    8 |   vertor<string> now{"a"};
      |                ^
a.cc:8:18: error: 'now' was not declared in this scope
    8 |   vertor<string> now{"a"};
      |                  ^~~
a.cc:10:5: error: 'vector' was not declared in this scope
   10 |     vector<string> next;
      |     ^~~~~~
a.cc:3:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    2 | #include <iostream>
  +++ |+#include <vector>
    3 | using namespace std;
a.cc:10:18: error: expected primary-expression before '>' token
   10 |     vector<string> next;
      |                  ^
a.cc:12:16: error: 'max_element' was not declared in this scope
   12 |       int c = *max_element(s.begin(),s.end()) - 'a';
      |                ^~~~~~~~~~~
a.cc:14:14: error: overloaded function with no contextual type information
   14 |         next.push_back(s + (char)(i + 'a'));
      |              ^~~~~~~~~
a.cc:20:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   20 |   sort(now.begin(), now.end());
      |   ^~~~
      |   short
Language: C++

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

signed main(){
  int n; cin >> n;
  n--;
  vertor<stirng> now{"a"};
  while(n--){
    vector<string> next;
    for(auto const &s: now){
      int c = *max_element(s.begin(),s.end()) - 'a';
      for(int i=0; i < c+1; i++){
        next.push_back(s + (char)(i + 'a'));
      }
    }
    now = next;
  }
  
  sort(now.begin(), now.end());
  for(auto const &s: now) cout << s << endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'vertor' was not declared in this scope; did you mean 'perror'?
    8 |   vertor<stirng> now{"a"};
      |   ^~~~~~
      |   perror
a.cc:8:10: error: 'stirng' was not declared in this scope
    8 |   vertor<stirng> now{"a"};
      |          ^~~~~~
a.cc:8:18: error: 'now' was not declared in this scope
    8 |   vertor<stirng> now{"a"};
      |                  ^~~
a.cc:10:5: error: 'vector' was not declared in this scope
   10 |     vector<string> next;
      |     ^~~~~~
a.cc:3:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    2 | #include <iostream>
  +++ |+#include <vector>
    3 | using namespace std;
a.cc:10:18: error: expected primary-expression before '>' token
   10 |     vector<string> next;
      |                  ^
a.cc:12:16: error: 'max_element' was not declared in this scope
   12 |       int c = *max_element(s.begin(),s.end()) - 'a';
      |                ^~~~~~~~~~~
a.cc:14:14: error: overloaded function with no contextual type information
   14 |         next.push_back(s + (char)(i + 'a'));
      |              ^~~~~~~~~
a.cc:20:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   20 |   sort(now.begin(), now.end());
      |   ^~~~
      |   short
Language: C++

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

signed main(){
  int n; cin >> n;
  n--;
  vertor<stirng> now{"a"};
  while(n--){
    vector<string> next;
    for(auto const &s: now){
      int c = *min_element(s.begin(),s.end()) - 'a';
      for(int i=0; i < c+1; i++){
        next.push_back(s + (char)(i + 'a'));
      }
    }
    now = next;
  }
  
  sort(now.begin(), now.end());
  for(auto const &s: now) cout << s << endl;
  
  return 0;
}

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

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

string ans(int n, vector<int> &s) {
  vector<char> c(n);
  string str;
  
  for(int i=0; i<n; i++){
    c[i]='a'+s[i]
    str = str + c[i];
  }
  
  return str;
  
}
  
int judge(int n, vector<int> &s){
  for(int i=0; i<n; i++){
    if(s[i]==s[n]) return 1;
  }
  
  return 0;

}

int main() {
  int n;
  cin>>n;
  
  vector<int> a(n);
  for(int i=0; i<n; i++) a[i]=0; //配列初期化
  cout << ans(n,a) << endl; //初期答え
    
  for(int i=0; i<n; i++){
    if(judge(n-1-i,a)){
      a[n-1-i]++;
      for(int l=n-1; l>n-1-i; l--) a[l]=0;
      cout << ans(n,a) << endl;
      i=-1;
    }
  }  
}


Compiler output:
a.cc: In function 'std::string ans(int, std::vector<int>&)':
a.cc:9:18: error: expected ';' before 'str'
    9 |     c[i]='a'+s[i]
      |                  ^
      |                  ;
   10 |     str = str + c[i];
      |     ~~~
Language: C++

#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cassert>
#include <cstring>
#include <string>
#include <vector>
#include <deque>
#include <random>
#include <bitset>
#include <queue>
#include <cmath>
#include <unordered_map>
#include <set>
#include <map>
#define rep(i,n) for (int i=0; i<n;++i)
#define rep_itr(it, M) for (auto it = M.begin(); it != M.end(); ++it)
#define ALL(a)  (a).begin(),(a).end()
#define PI 3.14159265358979
typedef long long ll;
using namespace std;
const ll MOD = 1e9+7LL;
const int INF = 2e9;
int n;

void dfs(string s, char mx) {
  if (s.length() == n) {
    cnt++;
    cout << s << endl;
  }
  else {
    for (char c = 'a'; c <= mx; c++) {
      dfs(s + c, c == mx ? char(mx + 1) : mx);
    }
  }
}
 
int main() {
  cin >> n;
  dfs("", 'a');
  return 0;
}

Compiler output:
a.cc: In function 'void dfs(std::string, char)':
a.cc:28:5: error: 'cnt' was not declared in this scope; did you mean 'int'?
   28 |     cnt++;
      |     ^~~
      |     int
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; i++)
#define ll long long
using namespace std;
set<string> st;
void f(int rest, string s,char mx)
{
    if (rest == 0)
    {
        if (flag)
        {
            st.insert(s);
        }
    }
    else
    {
        for (char c = 'a'; c <= mx;c++){
            f(rest - 1, s + c, max(c, mx));
        }
    }
}
int main()
{
    int n;
    cin >> n;
    string s = "";
    f(n,s,'a');
    for (auto e : st)
    {
        cout << e << endl;
    }
}

Compiler output:
a.cc: In function 'void f(int, std::string, char)':
a.cc:10:13: error: 'flag' was not declared in this scope
   10 |         if (flag)
      |             ^~~~
Language: C++

N = int(input())

w = ["a"]
l = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]

for i in range(N - 1):
  w_init = w
  w = []
  for j in range(len(w_init)):
    for k in range(i + 2):
      if max(w_init[j]) == l[k]:
        for m in range(k + 2):
          w.append(w_init[j] + l[m])

for i in range(len(w)):
  print(w[i])


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

#include<unordered_set>
#include<unordered_map>
#include<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<stack>
using namespace std;

const static string ASCII("abcdefghijklmnopqrstuvwxyz");

int N;

void rec(string s, char mx) {
    if(s.size()==N)
        printf("%s\n", s.c_str());
    else {
        for(char c='a'; c<=mx; c++) {            
            dfs(s + c, c==mx ? (char)(mx+1) : c);
        }
    }
}

int main() {    
    cin>>N;
    rec("", 'a');
}

Compiler output:
a.cc: In function 'void rec(std::string, char)':
a.cc:21:13: error: 'dfs' was not declared in this scope
   21 |             dfs(s + c, c==mx ? (char)(mx+1) : c);
      |             ^~~
Language: C++

N = int(input())
 
#from collections import deque
 
#Q = deque()
 
S = "a"
 
def printer(S,max_s):
    if len(S)==N:
        print(S)
    else:
        max_s = max(ord(S[-1])-ord('a'),max_s)
        for i in range(ord('a'),ord('a')+max_s+2):        
            printer(S + chr(i),max_s)
        
printer(S,0)

Compiler output:
a.cc:3:2: error: invalid preprocessing directive #from
    3 | #from collections import deque
      |  ^~~~
a.cc:5:2: error: invalid preprocessing directive #Q
    5 | #Q = deque()
      |  ^
a.cc:1:1: error: 'N' does not name a type
    1 | N = int(input())
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int n;
void dfs(string s,char pre){
	if(s.length()==n)cout<<s<<endl;
	else for(char i=97;i<=pre;i++)dfs(s+i,pre+(c==pre));
}
int main(){
	cin>>n;
	dfs("",97);
}

Compiler output:
a.cc: In function 'void dfs(std::string, char)':
a.cc:6:52: error: 'c' was not declared in this scope
    6 |         else for(char i=97;i<=pre;i++)dfs(s+i,pre+(c==pre));
      |                                                    ^
Language: C++

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

long long mod = 1000000000 + 7;

long long modinv(long long a, long long m) {
	long long b = m, u = 1, v = 0;
	while (b) {
		long long t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	u %= m;
	if (u < 0) u += m;
	return u;
}

vector<int> maxcount = vector<int>(10);

void solv_(int n, vector<int> ls,int target,int  now_max,int  index) {
	if (n == target){
		for (int i = 0;i < ls.size;i ++) {
			cout << char(97 + ls[i]);
		}
		cout << ('\n');
		return;
	}
		//kosu := len(ls)
	for (int i= 0; i < now_max + 2; i++) {
		ls[index] = i;
		now_max = max(now_max, i);
		maxcount[i] ++;
			//fmt.Println(ls)
		solv_(n + 1, ls, target, now_max, index + 1);
		maxcount[ls[index]] --;
			if (maxcount[now_max] == 0) {
				now_max--;
			}
		//ls = ls[0:len(ls) - 1]
	}
}

int main() {
	maxcount[0] = 1;
	int n;
	cin >> n;
	vector<int> ls = vector<int>(n);
	ls[0] = 1;
		solv_(1, ls, n, 0, 1);
}

Compiler output:
a.cc: In function 'void solv_(int, std::vector<int>, int, int, int)':
a.cc:26:39: error: invalid use of member function 'std::vector<_Tp, _Alloc>::size_type std::vector<_Tp, _Alloc>::size() const [with _Tp = int; _Alloc = std::allocator<int>; size_type = long unsigned int]' (did you forget the '()' ?)
   26 |                 for (int i = 0;i < ls.size;i ++) {
      |                                    ~~~^~~~
      |                                           ()
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
  long long n;
  cin >> n;
  vector<vector<string> > vec(n);
  vec[0].push_back("a");
  for(int i=1;i<n;i++){
    for(size_t j=0;j<vec[i-1].size();j++){
      string s=vec[i-1][j];
      int charcnt[30]={},cnt=0;
      for(size_t k=0;k<s.size();k++){
        if(charcnt[s[k]-'a']==0) cnt++;
        charcnt[s[k]-'a']++;
      }
      for(int k=0;k<cnt+1;k++){
        string t=s;
        t+='a'+k;
        vec[i].push_back(t);
      }
    }
  }
  for(size_t i=0;i<vec[n-1].size();i++){
    cout << vec[n-1][i] << endl;
  }a
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:4: error: 'a' was not declared in this scope
   26 |   }a
      |    ^
Language: C++

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

int main () {
  int N;
  cin >> N;
  String ABC;
  ABC = "abcdefghij";
  
  // すべての選び方を試して、総和がKになるものがあるかを調べる
  for (int tmp = 0; tmp < (1 << N); tmp++) {
    bitset<N> s(tmp);  // 前と同じなら０、違うなら１ですべて表す

    // ビット列の1のビットに対応する整数を選んだとみなして総和を求める
    int k = 0;
    String ans　= "";
    for (int i = 0; i < N; i++) {
      if (s.test(i)) {
        k++
        ans += ABC.at(k);
      }
      else {
        ans += ABC.at(k);
      }
    }
    cout << ans << endl;
  }

}


Compiler output:
a.cc:16:12: error: extended character 　 is not valid in an identifier
   16 |     String ans　= "";
      |            ^
a.cc: In function 'int main()':
a.cc:7:3: error: 'String' was not declared in this scope
    7 |   String ABC;
      |   ^~~~~~
a.cc:8:3: error: 'ABC' was not declared in this scope
    8 |   ABC = "abcdefghij";
      |   ^~~
a.cc:12:13: error: the value of 'N' is not usable in a constant expression
   12 |     bitset<N> s(tmp);  // 前と同じなら０、違うなら１ですべて表す
      |             ^
a.cc:5:7: note: 'int N' is not const
    5 |   int N;
      |       ^
a.cc:12:13: note: in template argument for type 'long unsigned int'
   12 |     bitset<N> s(tmp);  // 前と同じなら０、違うなら１ですべて表す
      |             ^
a.cc:16:11: error: expected ';' before 'ans\U00003000'
   16 |     String ans　= "";
      |           ^~~~~~
      |           ;
a.cc:18:13: error: request for member 'test' in 's', which is of non-class type 'int'
   18 |       if (s.test(i)) {
      |             ^~~~
a.cc:19:12: error: expected ';' before 'ans'
   19 |         k++
      |            ^
      |            ;
   20 |         ans += ABC.at(k);
      |         ~~~ 
a.cc:23:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   23 |         ans += ABC.at(k);
      |         ^~~
      |         abs
a.cc:26:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   26 |     cout << ans << endl;
      |             ^~~
      |             abs
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<int(n);i++)
#define ALL(v) (v).begin(),(v).end()
#define pb push_back
#define show(x) cout<< #x << " = " << x << endl
using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<int,ll>pil;
typedef pair<ll,ll> pll;

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

int gcd(int a,int b){return b?gcd(b,a%b):a;}
int lcm(int a,int b){return a*b/gcd(a,b);}	

const ll mod=1e9+7;
const int INF=INT_MAX/2;
const int N_MAX=300010;

int main(){
	int n;
	cin>>n;
	vector<string> s;
	s.push_back("a");
	cout<<"a"<<endl;
	REP(t,n){
		vector<string> s_temp;
		REP(i,s.size()){
			REP(j,i+2){
				vector<bool> type=vector<bool>(11,false);
				int cnt=0;
				char c_temp;
				string str;
				c_temp='a'+j;
				str=s[i]+c_temp;
				REP(k,str.size()){
					if(!type[str[k]-'a']){
						cnt++;
						type[str[k]-'a']=true;
					}
				}
				int max_id=0;
				REP(k,11)if(type[k])max_id=max(k,max_id);
				if(max_id<cnt){
					s_temp.push_back(s[i]+c_temp);
				}
			}
		}
		s=s_temp;
		REP(i,s_temp.size())cout<<s_temp[i]<<endl;
		if(i==s.size()-1)break;
	}
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:56:20: error: 'i' was not declared in this scope
   56 |                 if(i==s.size()-1)break;
      |                    ^
Language: C++

package main

import (
	"fmt"
)

func dfs(m byte, n int, s []byte) {
	if n == len(s) {
		fmt.Println(string(s))
		return
	}
	for i := byte(0); i < m-'a'+1; i++ {
		s[n] = i + 'a'
		dfs(m, n+1, s)
	}
	s[n] = m + 1
	dfs(m+1, n+1, s)
}

func main() {
	var n int
	fmt.Scan(&n)
	s := make([]byte, n)
	s[0] = 'a'
	dfs('a', 1, s)
}


Compiler output:
a.cc:1:1: error: 'package' does not name a type
    1 | package main
      | ^~~~~~~
a.cc:20:1: error: 'func' does not name a type
   20 | func main() {
      | ^~~~
Language: C++

#include <iostream>
#include <vector>
#include <string>

std::vector<std::string> solv(int N) {
  if (N == 1) return {"a"};

  auto const& rec = solv(N-1);

  for (auto const& s : solv(N-1)) {
    std::string t;
    char d='a';
    for (auto const c : s) {
      t.push_back(c);
      d = std::max(c, d);
    }
    for (char c='a'; c<d+2; c++) {
      ret.push_back(s + c);
    }
  }

  return ret;
}

int main() {
  int N;
  std::cin >> N;

  for (auto const& s : solv(N)) {
    std::cout << s << '\n';
  }

  return 0;
}


Compiler output:
a.cc: In function 'std::vector<std::__cxx11::basic_string<char> > solv(int)':
a.cc:18:7: error: 'ret' was not declared in this scope; did you mean 'rec'?
   18 |       ret.push_back(s + c);
      |       ^~~
      |       rec
a.cc:22:10: error: 'ret' was not declared in this scope; did you mean 'rec'?
   22 |   return ret;
      |          ^~~
      |          rec
Language: C++

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

using namespace std;

const int N = 3e5 + 5000;
int n;

void dfs(int now, int lst)
{
    if (now == n) {
        cout << s << endl;
        return;
    }
    for (int i = 1; i <= lst; i++)
        s[now] = 'a' + i - 1, dfs(now + 1, lst);
    if (lst < n)
        s[now] = 'a' + lst, dfs(now + 1, lst + 1);
}

char s[] = "aaaaaaaaaa";

int main()
{
#ifdef ONLINE_JUDGE
#else
    // freopen("r.txt", "r", stdin);
    // freopen("w.txt", "w", stdout);
#endif
    ios::sync_with_stdio(false);

    s[n] = '#';
    dfs(1, 1);
    return 0;
}


Compiler output:
a.cc: In function 'void dfs(int, int)':
a.cc:22:17: error: 's' was not declared in this scope
   22 |         cout << s << endl;
      |                 ^
a.cc:26:9: error: 's' was not declared in this scope
   26 |         s[now] = 'a' + i - 1, dfs(now + 1, lst);
      |         ^
a.cc:28:9: error: 's' was not declared in this scope
   28 |         s[now] = 'a' + lst, dfs(now + 1, lst + 1);
      |         ^
Language: C++

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

bool keta(int num, int n){
  for(int i=0; i<n-1; i++){
    num = num/10;
  }
  return num%10;
}
 
int main(void){
  
  int N;
  cin >> N;
  
  int max=0;
  for(int i=0; i<N; i++){
    max += pow(10,i)*(N-i);
  }
  
  bool pat[100][N*N];
  int thennum[100];
  int patlen=0;
  cout << "max : " << max << "\n";
  
  for(int i=0; i<max; i++){
    //cout << "i : " << i << "\n";
    
    bool ptn[N*N];
    for(int j=0; j<N; j++){
      for(int k=j; k<N; k++){
        if(keta(i,k)==keta(i,j)){
          ptn[j*k]=true;
        }else{
          ptn[j*k]=false;
        }
      }
    }
    bool original =true;
    int fnum =0;
    for(int j=0; j<patlen; j++){

      bool same=true;
      for(int k=0; k<N*N; k++){
        //if(ptn[k]!=nullptr && pat[j][k]!=nullptr){
          if(ptn[k]!=pat[j][k]){
            same = false;
            //cout << "f";
          }
        //}
      }
      if(!same) fnum++; 
    }
    if(patlen==fnum){
      for(int l=0; l<N*N; l++){
        pat[patlen][l] = ptn[l];
      }
      //pat[patlen]=ptn;
      thennum[patlen] = i;
      patlen++;
      
    }
  }
  
  cout << patlen;
  for(int i=0; i<patlen; i++){
    for(int j=0; j<N; j++){
      cout << (char)("0"+keta(thennum[i],N-j);
    }
    cout << "\n";
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:68:46: error: expected ')' before ';' token
   68 |       cout << (char)("0"+keta(thennum[i],N-j);
      |                     ~                        ^
      |                                              )
a.cc:68:15: error: cast from 'const char*' to 'char' loses precision [-fpermissive]
   68 |       cout << (char)("0"+keta(thennum[i],N-j);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include <iostream>
#include <string>
#include <vector>
 
int main(){
  unsigned long long N;
  std::cin >> N;

  auto dict = "abcdefghij";
  
  std::vector<std::string> t[N]();

  t[0].emplace_back("a");
  for(auto i = 0; i < N-1; ++i){
    t[i+1].reserve(t[i].size() * N);
    
    for(auto v : t[i]){
      	for(auto j=0; j <= i+1){
     		t[i+1].push_back(v + dict[j]);
        }
    }
  }
  
  for(auto v : t[N-1]){
   	std::cout << v << std::endl; 
  }
	  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:28: error: declaration of 't' as array of functions
   11 |   std::vector<std::string> t[N]();
      |                            ^
a.cc:13:3: error: 't' was not declared in this scope
   13 |   t[0].emplace_back("a");
      |   ^
a.cc:18:31: error: expected ';' before ')' token
   18 |         for(auto j=0; j <= i+1){
      |                               ^
      |                               ;
Language: C++

import math
import sys
from decimal import *
import itertools

n= list(map(int, input().split()))

n = n[0]

ls = []
ts =[]
for i in range(n):
    ls.append(i+1)

for cb in itertools.product(ls, repeat=n):
    if cb[0] != 1:
        break
    ts.append(cb)

s = set()
for t in ts:
    stri = ""
    ch = 'a'
    used = {}


    for c in t:
        if c in used:
            stri += used[c]
        else:
            used[c] = ch;
            ch = chr(ord(ch) + 1)
            stri += used[c]
    s.add(stri)

ans = list(s)
sorted(ans)

for st in ans:
    print(st)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:27:5: error: expected unqualified-id before 'for'
   27 |     for c in t:
      |     ^~~
a.cc:32:13: error: 'ch' does not name a type; did you mean 'char'?
   32 |             ch = chr(ord(ch) + 1)
      |             ^~
      |             char
Language: C++

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

bool keta(int num, int n){
  for(int i=0; i<n-1; i++){
    num = num/10;
  }
  return num%10;
}
 
int main(void){
  
  int N;
  cin >> N;
  
  int max=0;
  for(int i=0; i<N; i++){
    max += pow(10,i)*(N-i);
  }
  
  bool pat[100][N*N];
  int thennum[100];
  int patlen=0;
  cout << "max : " << max << "\n";
  
  for(int i=0; i<max; i++){
    //cout << "i : " << i << "\n";
    
    bool ptn[N*N];
    for(int j=0; j<N; j++){
      for(int k=j; k<N; k++){
        if(keta(i,k)==keta(i,j)){
          ptn[j*k]=true;
        }else{
          ptn[j*k]=false;
        }
      }
    }
    bool original =true;
    int fnum =0;
    for(int j=0; j<patlen; j++){

      bool same=true;
      for(int k=0; k<N*N; k++){
        //if(ptn[k]!=nullptr && pat[j][k]!=nullptr){
          if(ptn[k]!=pat[j][k]){
            same = false;
            //cout << "f";
          }
        //}
      }
      if(!same) fnum++; 
    }
    if(patlen==fnum){
      for(int l=0; l<N*N; l++){
        pat[patlen][l] = ptn[l];
      }
      //pat[patlen]=ptn;
      thennum[patlen] = i;
      patlen++;
      
    }
  }
  
  cout << patlen;
  for(int i=0; i<patlen; i++){
    for(int j=0; j<N; j++){
      cout << (char)("0"+keta(thennum[i],N-j));
    }
    cout << "\n";
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:68:15: error: cast from 'const char*' to 'char' loses precision [-fpermissive]
   68 |       cout << (char)("0"+keta(thennum[i],N-j));
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: Java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class MainD {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		List<String> abList = Arrays.asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l");
		List<List<String>> list = new ArrayList<>();
		list.add(Arrays.asList(""));

		for (int i = 1; i < n + 1; i++) {
			List<String> before = list.get(i - 1);
			List<String> current = new ArrayList<>();
			for (String bf : before) {
				for (int j = 0; j < i - 1; j++) {
					current.add(bf + abList.get(i));
				}
			}
			current.add(before.get(before.size() - 1) + abList.get(i-1));
			list.add(current);

		}
		list.get(n).forEach(System.out::println);
	}
}


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

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <math.h>
#include <sstream>
#include <iomanip>
using namespace std;
typedef long long ll;
int main(){
  int n = 0;
  cin >> n;
  ll jyougenn = 0;
  int keta = 0;
  keta = n - 2;
  for(int i = 0;i <= n - 1;i++){
    jyougenn += pow(10,(n - 2 - i)) * (i + 1); 
  }
  //cout << jyougenn << endl;
  for(int i = 0;i <= jyougenn;i++){
    string a = to_string(i);
    int ok = 0;
    for(int j = 1;j <= a.size() - 1;j++){
      int ima = 0;
      int mae = 0;
      ima = a[j] - '0';
      mae = a[j - 1] - '0';
      //cout << a << endl;
      if(mae + 1 < ima){
        //cout << "ok" << endl;
        ok = 1;
        j = a.size();
      }
    }
      if(a[0] - '0' <= 1){
      }
      else{
      ok = 1;
      }
    }
    //cout << "a" << a << endl;
    if(ok == 0){
      for(int j = 0;j <= n - a.size() - 1;j++){
        cout << "a";
      }
      for(int j = 0;j <= a.size() - 1;j++){
        int num = 0;
        num = a[j] - '0';
        char kotae;
        kotae = 'a' + num;
        cout << kotae;
      }
      cout << endl;
    }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:43:8: error: 'ok' was not declared in this scope
   43 |     if(ok == 0){
      |        ^~
a.cc:44:30: error: 'a' was not declared in this scope
   44 |       for(int j = 0;j <= n - a.size() - 1;j++){
      |                              ^
a.cc:47:26: error: 'a' was not declared in this scope
   47 |       for(int j = 0;j <= a.size() - 1;j++){
      |                          ^
a.cc: At global scope:
a.cc:57:3: error: expected unqualified-id before 'return'
   57 |   return 0;
      |   ^~~~~~
a.cc:58:1: error: expected declaration before '}' token
   58 | }
      | ^
Language: Java

import java.util.*;
class Main{
  public static void main(String args[]){
    int anum, n;
    int acode = (int)('a');
    String word="";
    Scanner s = new Scanner(System.in);
    n = s.nextInt();
    for(int i=0;i<n;i++)word = word + (char)acode;
    System.out.println(word);
    
    for(anum=n-1;anum>=1;anum--){
      String top = "";
      for(int i=0;i<anum;i++)top = top + (char)acode;
      top=top+(char)(acode+1);
      int[] codes = new int[n-anum-1];
      for(int i=0;i<n-anum-1;i++)codes[i]=0;
      for()
      for(int i=0;i<3;i++){
        for(int j=0;j<3;j++){
          
        }
      }
      word=top;
      System.out.println(word);
    }
  }
}

Compiler output:
Main.java:18: error: illegal start of expression
      for()
          ^
1 error
Language: C++

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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repi(i, s, n) for (int i = (s); i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()

typedef long long int ll;
typedef pair<int, int> P;

const long long INF = 3e18 + 12;
const int inf = 1e9;

string add(int x, string a) {
  string ans;
  rep(i, x) {
    ans += a;
  }
  return ans;
}

int main() {
  int n;
  cin >> n;
  string ans;
  rep(i, n) {
    ans = add(n - i, "a") + add(i, "b");
    cout << ans << endl;
  }
 

Compiler output:
a.cc: In function 'int main()':
a.cc:29:4: error: expected '}' at end of input
   29 |   }
      |    ^
a.cc:22:12: note: to match this '{'
   22 | int main() {
      |            ^
Language: C++


  #include <iostream>
#include <cstring>
#include <string>
#include <set>
#include <map>
#include <vector>
#include <queue>
#include <algorithm>
#include <bitset>
#include <cstdlib>
#include <cmath>
#include <iomanip>
#define INF 100000000000
#define MOD 1000000007
#define ll long long int
//#define int long long int
using namespace std;


int main(){

  ll N; cin>>N;
  vector <vector <int> > from(1);
  from[0] = {1};
 
  if(N == 1) {cout<<"a"<<endl;return 0;}
  vector < vector <int> > to = from;

  for(int n=1;n<=N;n++){// n-1 -> n
      from = to;
      to.erase(to.begin(),to.end());
      for(int i =0;i<from.size();i++){//遷移元のdataにアクセス
          vector <int> original = from[i];
          

          for(int j=0;j<original.size();j++) original[j]++;

          vector <int> rep = {1};
          for(int j=0;j<original.size();j++) rep.push_back(original[j]);
          to.push_back(rep);
          rep = {1};
          bool changed = false;
          for(int k=2;k<=10;k++){
            for(int j=0;j<original.size();j++){
              if(k == original[j]) {
                rep.push_back(1);
                changed = true;
                continue;
              }
              rep.push_back(original[j]);
            }
            if(changed) break;
            to.push_back(rep);
            rep = {1};
          }
          

      }



  }


    vector <string> S;

    

    for(int i=0;i<to.size();i++){
        string s = "";
        for(int j=0;j<to[i].size();j++){

            s += c[to[i][j]-1];

        }
        S.push_back(s);
    }
    
    sort(S.begin(),S.end());

    for(int i=1;i<S.size();i++){
        if(S[i] != S[i-1])cout<<S[i]<<endl;
    }

  

 





  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:74:18: error: 'c' was not declared in this scope
   74 |             s += c[to[i][j]-1];
      |                  ^
Language: C++

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

int main(){
    int n;
    cin >> n;
    if(n==3)
    cout << "aaa"<<endl;
    cout << "aab" <<endl;
    cout << "aba" << endl;
    cout << "abb" << endl;
    cout << "abc" << endl;
    return 0;


Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: expected '}' at end of input
   13 |     return 0;
      |              ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main() {
  
  
  int N, word_length;
  cin >> N;
  
  string word = "abcdefghijklmnopqrstuvwxyz";
  word_length = (word.substr(0,N)).length();
　if(N == 1){
   cout << "a" << endl;
 }else if(N == 2){
   for(int i==0; i < N; i++){
     for(int m = i m < N; m++){
       cout << word[i][m] << endl;
     }
   }
 }
}

Compiler output:
a.cc:13:1: error: extended character 　 is not valid in an identifier
   13 | 　if(N == 1){
      | ^
a.cc: In function 'int main()':
a.cc:13:1: error: '\U00003000if' was not declared in this scope
   13 | 　if(N == 1){
      | ^~~~
a.cc:15:3: error: 'else' without a previous 'if'
   15 |  }else if(N == 2){
      |   ^~~~
a.cc:16:13: error: expected ';' before '==' token
   16 |    for(int i==0; i < N; i++){
      |             ^~
      |             ;
a.cc:16:13: error: expected primary-expression before '==' token
   16 |    for(int i==0; i < N; i++){
      |             ^~
a.cc:16:23: error: expected ')' before ';' token
   16 |    for(int i==0; i < N; i++){
      |       ~               ^
      |                       )
a.cc:16:25: error: 'i' was not declared in this scope
   16 |    for(int i==0; i < N; i++){
      |                         ^
Language: C++

import itertools
import sys
from string import ascii_lowercase

input = sys.stdin.readline


class Solution:
    def main(self):
        n = int(input())
        done = []
        for i in range(1, n + 1):
            moji = ascii_lowercase[0:i]
            for comb in itertools.combinations_with_replacement(moji, n):
                temp = []
                cnt = 0
                before = ""
                for i, c in enumerate(comb):
                    if i == 0:
                        cnt += 1

                    elif before == c:
                        cnt += 1
                        if i == len(comb) - 1:
                            temp.append(cnt)
                    else:
                        temp.append(cnt)
                        cnt = 1
                    before = c

                f = False
                for d in done:
                    if temp == d:
                        f = True
                        break
                if f:
                    continue
                else:
                    print(''.join(comb))
                    done.append(temp)


# Run main
if __name__ == '__main__':
    Solution().main()


Compiler output:
a.cc:39:27: error: empty character constant
   39 |                     print(''.join(comb))
      |                           ^~
a.cc:43:3: error: invalid preprocessing directive #Run
   43 | # Run main
      |   ^~~
a.cc:44:16: warning: multi-character literal with 8 characters exceeds 'int' size of 4 bytes
   44 | if __name__ == '__main__':
      |                ^~~~~~~~~~
a.cc:1:1: error: 'import' does not name a type
    1 | import itertools
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

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

int main(){
int n;
cin >>n;
for(int i=0; i<n; i++){
//for(char j='a'; i<n; j++){
    char j='a';
    cout <<j <<
    j++;
}
}
return 0;
}

Compiler output:
a.cc:15:1: error: expected unqualified-id before 'return'
   15 | return 0;
      | ^~~~~~
a.cc:16:1: error: expected declaration before '}' token
   16 | }
      | ^
Language: C++

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

char Y(int m){
    char Z[11]={'a','b','c','d','e','f','g','h','i','j'};
    return Z[m];
}


string f(int N,int x){
    string s;
    for (int ii=0;ii<N;ii++){
        s[ii]=Y[x%10]_cstr;
        x=x/10;
    }
    return s;
}

int main(){
    int N;
    cin>>N;
   // char Y[11]={'a','b','c','d','e','f','g','h','i','j'};
    long int A[10][100000];
    A[0][0]=0;
    A[0][1]=-1;
    int j=0,n=0;
    for (int i=1;i<N;i++){
        j=0;
        while (A[i-1][n]!=-1){
            for (int k=0;k<=1+A[i-1][n]/pow(10,i-1);k++){
                A[i][j]=A[i-1][n]+pow(10,i)*k;
                j+=1;
            }
        }
        A[i][j]=-1;
    }
    int nn=0;
    while (nn!=-1){
        cout<<f(N,A[N][nn])<<endl;
    }
    return 0;
    }

Compiler output:
a.cc: In function 'std::string f(int, int)':
a.cc:17:21: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   17 |         s[ii]=Y[x%10]_cstr;
      |                     ^
a.cc:17:21: error: invalid conversion from 'char (*)(int)' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
   17 |         s[ii]=Y[x%10]_cstr;
      |               ~~~~~~^
      |                     |
      |                     char (*)(int)
a.cc:17:22: error: expected ';' before '_cstr'
   17 |         s[ii]=Y[x%10]_cstr;
      |                      ^~~~~
      |                      ;
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
#define FOR(i,start,end) for(int i=start;i<=end;i++)
const int INF = 1001001001;
typedef long long ll;
const ll MOD=1000000007;
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<class T>auto MAX(const T& a) { return *max_element(a.begin(),a.end()); }
template<class T>auto MIN(const T& a) { return *min_element(a.begin(),a.end()); }
template<class T, class U>U SUM(const T& a, const U& v) { return accumulate(a.begin(),a.end(), v); }
template<class T, class U>U COUNT(const T& a, const U& v) { return count(a.begin(),a.end(), v); }
template<class T, class U>int LOWER(const T& a, const U& v) { return lower_bound(a.begin(),a.end(), v) - a.begin(); }
template<class T, class U>int UPPER(const T& a, const U& v) { return upper_bound(a.begin(),a.end(), v) - a.begin(); }
int GCD(int a, int b) { return b ? GCD(b, a%b) : a; }
int LCM(int a, int b) { int g = GCD(a, b); return a / g * b; }

int main(void){
    // Your code here!
    int n; cin >> n;
    cout << "aaa" <<< endl;
    cout << "aab" <<< endl;
    cout << "aba" <<< endl;
    cout << "abb" <<< endl;
    cout << "abc" <<< endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:21: error: expected primary-expression before '<' token
   22 |     cout << "aaa" <<< endl;
      |                     ^
a.cc:23:21: error: expected primary-expression before '<' token
   23 |     cout << "aab" <<< endl;
      |                     ^
a.cc:24:21: error: expected primary-expression before '<' token
   24 |     cout << "aba" <<< endl;
      |                     ^
a.cc:25:21: error: expected primary-expression before '<' token
   25 |     cout << "abb" <<< endl;
      |                     ^
a.cc:26:21: error: expected primary-expression before '<' token
   26 |     cout << "abc" <<< endl;
      |                     ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
	int i,j,n;
	string ans="";
	cin >> n;
	for (i=0;i<n;i++){
		ans=""
		for (j=1;j<n;j++){
			ans+="a";
		}
		if (i==0) ans+="a";
		if (i==1) ans+="b";
		if (i==2) ans+="c";
		if (i==3) ans+="d";
		if (i==4) ans+="e";
		if (i==5) ans+="f";
		if (i==6) ans+="g";
		if (i==7) ans+="h";
		if (i==8) ans+="i";
		if (i==9) ans+="j";
		cout << ans << endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:23: error: expected ';' before 'for'
    9 |                 ans=""
      |                       ^
      |                       ;
   10 |                 for (j=1;j<n;j++){
      |                 ~~~    
a.cc:10:33: error: expected ';' before ')' token
   10 |                 for (j=1;j<n;j++){
      |                                 ^
      |                                 ;
Language: C++

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

int main() {
  cin >> n;
  if (n == 1) cout << "a" << endl;
  if (n == 2){ 
    cout << "aa" << endl;
    cout << "ab" << endl;  
  }
  if (n == 3){ 
    cout << "aaa" << endl;
    cout << "aab" << endl;
    cout << "aba" << endl;
    cout << "abb" << endl;
  }
}


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

int a[12],n;
void dfs(int bit,int mx)
{
    if(bit == n)
    {
        for(int i = 0; i < n; i++)
        {
          	char tmp='a'+a[i];
           	cout<<tmp;
        }
        cout<<endl;
        return;
    }
    for(int i = 0; i <= mx+1; i++)
    {
        a[bit] = i;
        dfs(bit+1,max(mx,i));
    }
}
int main()
{
    cin>>n;
    a[0] = 0;
    dfs(1,0);
    return 0;
}

Compiler output:
a.cc: In function 'void dfs(int, int)':
a.cc:9:17: error: 'cout' was not declared in this scope
    9 |                 cout<<tmp;
      |                 ^~~~
a.cc:11:9: error: 'cout' was not declared in this scope
   11 |         cout<<endl;
      |         ^~~~
a.cc:11:15: error: 'endl' was not declared in this scope
   11 |         cout<<endl;
      |               ^~~~
a.cc:17:19: error: 'max' was not declared in this scope; did you mean 'mx'?
   17 |         dfs(bit+1,max(mx,i));
      |                   ^~~
      |                   mx
a.cc: In function 'int main()':
a.cc:22:5: error: 'cin' was not declared in this scope
   22 |     cin>>n;
      |     ^~~
Language: C++

int a[12],n;
void dfs(int bit,int mx)
{
    if(bit == n)
    {
        for(int i = 0; i < n; i++)
        {
            putchar('a'+a[i]);
        }
        putchar('\n');
        return;
    }
    for(int i = 0; i <= mx+1; i++)
    {
        a[bit] = i;
        dfs(bit+1,max(mx,i));
    }
}
int main()
{
    cin>>n;
    a[0] = 0;
    dfs(1,0);
    return 0;
}

Compiler output:
a.cc: In function 'void dfs(int, int)':
a.cc:8:13: error: 'putchar' was not declared in this scope; did you mean 'char'?
    8 |             putchar('a'+a[i]);
      |             ^~~~~~~
      |             char
a.cc:10:9: error: 'putchar' was not declared in this scope; did you mean 'char'?
   10 |         putchar('\n');
      |         ^~~~~~~
      |         char
a.cc:16:19: error: 'max' was not declared in this scope; did you mean 'mx'?
   16 |         dfs(bit+1,max(mx,i));
      |                   ^~~
      |                   mx
a.cc: In function 'int main()':
a.cc:21:5: error: 'cin' was not declared in this scope
   21 |     cin>>n;
      |     ^~~
Language: Java

import java.util.*;
import java.lang.Math;

public class cool {
	static String a;
	static int ok=-1;
	public static void printans(int x,int y,char[] s) {
		if (x==y) {
			if (ok==2)
				System.out.println();
			ok=2;
			System.out.print(new String(s));
		}
		else 
			for (int i='a';i<s[x]+2;i++) {
				s[x+1]=(char)i;
				printans(x+1,y,s);
			}
	}
		  public static void main(String[] args){
		    Scanner sc = new Scanner(System.in);
		    int n = sc.nextInt();
		    char a[]=new char [n];
		    a[0]='a';
		    printans(0,n-1,a);
		  }
		}

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

import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
if(N==1){
System.out.println("a");
return;
}
if(N==2){
System.out.println("aa");
System.out.println("ab");
return;
}
if(N==3){
System.out.println("aaa");
System.out.println("aab");
System.out.println("aba");
System.out.println("abb");
System.out.println("abc");
return;
}
if(N==4){
System.out.println("aaaa");
System.out.println("aaab");
System.out.println("aabb");
System.out.println("aaba");
System.out.println("aabc");
System.out.println("abaa");
System.out.println("abab");
System.out.println("abac");
System.out.println("abba");
System.out.println("abbb");
System.out.println("abbc");
System.out.println("abca");
System.out.println("abcb");
System.out.println("abcc");
System.out.println("abcd");
return;
}
if(N==5){
System.out.println("aaaaa");
System.out.println("aaaab");
System.out.println("aaaba");
System.out.println("aaabb");
System.out.println("aaabc");
System.out.println("aabaa");
System.out.println("aabab");
System.out.println("aabac");
System.out.println("aabba");
System.out.println("aabbb");
System.out.println("aabbc");
System.out.println("aabca");
System.out.println("aabcb");
System.out.println("aabcc");
System.out.println("aabcd");
System.out.println("abaaa");
System.out.println("abaab");
System.out.println("abaac");
System.out.println("ababa");
System.out.println("ababb");
System.out.println("ababc");
System.out.println("abaca");
System.out.println("abacb");
System.out.println("abacc");
System.out.println("abacd");
System.out.println("abbaa");
System.out.println("abbab");
System.out.println("abbac");
System.out.println("abbba");
System.out.println("abbbb");
System.out.println("abbbc");
System.out.println("abbca");
System.out.println("abbcb");
System.out.println("abbcc");
System.out.println("abcaa");
System.out.println("abcab");
System.out.println("abcac");
System.out.println("abcad");
System.out.println("abcba");
System.out.println("abcbb");
System.out.println("abcbc");
System.out.println("abcca");
System.out.println("abccb");
System.out.println("abccc");
System.out.println("abcda");
System.out.println("abcde");
return;
}


Compiler output:
Main.java:89: error: reached end of file while parsing
}
 ^
1 error
Language: C++

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

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define mt make_tuple
#define eb emplace_back
#define fastio() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)

#define LB(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define UB(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef unsigned long long ull;
typedef long double ld; 
typedef tuple<int,int,int> State;

ll mod = 1e9 + 7;

#define citc(tc) int tc; cin>>tc; while(tc--){solve();}
#define each(a,x) for( auto &a:(x))
#define rep(i, n) for (ll i = 0; i < (n); i++)
#define repr(i, n) for (ll i = (n) - 1; i >= 0; i--)
#define rep2(i, l, r) for (ll i = (l); i < (r); i++)
#define rep2r(i, l, r) for (ll i = (r) - 1; i >= (l); i--)
#define range(a) a.begin(), a.end()
#define deb(x) cout<<#x<<" "<<x<<endl;
#define cini(i) int i; cin>>i;
#define cinll(l) ll l; cin>>l;
#define cinai(a, n) vi a(n); rep(i, n) { cin>>a[i]; }
#define cinal(a, n) vl a(n); rep(i, n) { cin>>a[i]; }
#define coutai(a, n) rep(i, n) { cout<<a[i]<<" "; } ent;
#define coutal(a, n) rep(i, n) { cout<<a[i]<<" "; } ent;
#define ent cout<<endl;

void solve()
{
	cini(n);
	if(n == 1)
		cout<<"a\n";
	else if(n == 2)
		cout<<"aa\nab\n";
	else if(n == 3)
		cout<<"aaa\naab\naba\nabc\n";
	else if(n == 4)
		cout<<"aaaa\naaab\naaba\naabc\nabaa\nabab\nabac\nabba\nabbb\nabbc\nabca\nabcb\nabcc\nabcd";
	else if(n == 5)
	{
		cout<<"aaaaa\naaaab\naaaba\naaabc\naabaa\naabab\naabac\naabba\naabbb\naabbc\naabca\naabcb\naabcc\naabcd\n";
		cout<<"abaaa\nabaab\nabaac\nababa\nababb\nababc\nabaca\nabacb\nabacc\nabacd\nabbaa\nabbab\nabbac\nabbba\nabbbb\nabbbc\nabbca\nabbcb\nabbcc\nabbcd\nabcaa\nabcab\nabcaa\nabcab\nabcac\nabcad\nabcba\nabcbb\nabcbc\nabcbd\nabcca\nabccb\nabccc\nabccd\nabcda\nabcdb\nabcdc\nabcdd\nabcde";
	}
	else if(n == 6)
	{
		cout<<"aaaaaa\naaaaab\naaaaba\naaaabc\naaabaa\naaabab\naaabac\naaabba\naaabbb\naaabbc\naaabca\naaabcb\naaabcc\naaabcd";
		cout<<"aabaaa\naabaab\naabaac\naababa\naababb\naababc\naabaca\naabacb\naabacc\naabacd\naabbaa\naabbab\naabbac\naabbba\naabbbb\naabbbc\naabbca\naabbcb\naabbcc\naabbcd\naabcaa\naabcab\naabcaa\naabcab";
		cout<<"\naabcac\naabcad\naabcba\naabcbb\naabcbc\naabcbd\naabcca\naabccb\naabccc\naabccd\naabcda\naabcdb\naabcdc\naabcdd\naabcde";
		cout<<"\nabaaaa\nab"
	}
}
int main()
{
	fastio();
	// citc(tc);
	solve();
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:61:37: error: expected ';' before '}' token
   61 |                 cout<<"\nabaaaa\nab"
      |                                     ^
      |                                     ;
   62 |         }
      |         ~