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

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

using LL = long long;
#define int LL 
const int N = 100005;
LL n, v, m, p;
LL a[N], b[N], sum[N];

int main () {
  cin >> n >> m >> v >> p;
  for (int i = 1; i <= n; ++i) cin >> a[i], b[i] = a[i];
  sort (b+1, b+1+n);
  for (int i = 1; i <= n; ++i) sum[i] = sum[i-1] + b[i];
  int ans = 0;
  for (int i = 1; i <= n; ++i) {
    int pos = upper_bound (b+1, b+1+n, a[i]) - b;
    int large = n-pos, del = large-p+1;
    if (del <= 0) ++ans;
    else if (a[i]+m < b[pos+del]) continue;
    else {
      LL used = 1LL * (n-del) * v;
      if (used <= 1LL * v * m) ++ans;
      else { 
      	LL left = 1LL * v * m - used;
        if (left + sum[pos+del] - sum[pos] <= 1LL * del * (a[i]+m)) ++ans;
      }
    }
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc:5:13: error: '::main' must return 'int'
    5 | #define int LL
      |             ^~
a.cc:10:1: note: in expansion of macro 'int'
   10 | int main () {
      | ^~~
Language: C++

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

using LL = long long;
#define int LL 
const int N = 100005;
LL n, v, m, p;
LL a[N], b[N], sum[N];

int main () {
  cin >> n >> m >> v >> p;
  for (int i = 1; i <= n; ++i) cin >> a[i], b[i] = a[i];
  sort (b+1, b+1+n);
  for (int i = 1; i <= n; ++i) sum[i] = sum[i-1] + b[i];
  int ans = 0;
  for (int i = 1; i <= n; ++i) {
    int pos = upper_bound (b+1, b+1+n, a[i]);
    int large = n-pos, del = large-p+1;
    if (del <= 0) ++ans;
    else if (a[i]+m < b[pos+del]) continue;
    else {
      LL used = 1LL * (n-del) * v;
      if (used <= 1LL * v * m) ++ans;
      else { 
      	LL left = 1LL * v * m - used;
        if (left + sum[pos+del] - sum[pos] <= 1LL * del * (a[i]+m)) ++ans;
      }
    }
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc:5:13: error: '::main' must return 'int'
    5 | #define int LL
      |             ^~
a.cc:10:1: note: in expansion of macro 'int'
   10 | int main () {
      | ^~~
a.cc: In function 'int main()':
a.cc:17:27: error: invalid conversion from 'long long int*' to 'LL' {aka 'long long int'} [-fpermissive]
   17 |     int pos = upper_bound (b+1, b+1+n, a[i]);
      |               ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
      |                           |
      |                           long long int*
Language: C++

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

using LL = long long;
#define int LL 

LL n, v, m, p;
LL a[N], b[N], sum[N];

int main () {
  cin >> n >> m >> v >> p;
  for (int i = 1; i <= n; ++i) cin >> a[i], b[i] = a[i];
  sort (b+1, b+1+n);
  for (int i = 1; i <= n; ++i) sum[i] = sum[i-1] + b[i];
  int ans = 0;
  for (int i = 1; i <= n; ++i) {
    int pos = upper_bound (b+1, b+1+n, a[i]);
    int large = n-pos, del = large-p+1;
    if (del <= 0) ++ans;
    else if (a[i]+m < b[pos+del]) continue;
    else {
      LL used = 1LL * (n-del) * v;
      if (used <= 1LL * v * m) ++ans;
      else { 
      	LL left = 1LL * v * m - used;
        if (left + sum[pos+del] - sum[pos] <= 1LL * del * (a[i]+m)) ++ans;
      }
    }
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc:8:6: error: 'N' was not declared in this scope
    8 | LL a[N], b[N], sum[N];
      |      ^
a.cc:8:12: error: 'N' was not declared in this scope
    8 | LL a[N], b[N], sum[N];
      |            ^
a.cc:8:20: error: 'N' was not declared in this scope
    8 | LL a[N], b[N], sum[N];
      |                    ^
a.cc:5:13: error: '::main' must return 'int'
    5 | #define int LL
      |             ^~
a.cc:10:1: note: in expansion of macro 'int'
   10 | int main () {
      | ^~~
a.cc: In function 'int main()':
a.cc:12:39: error: 'a' was not declared in this scope
   12 |   for (int i = 1; i <= n; ++i) cin >> a[i], b[i] = a[i];
      |                                       ^
a.cc:12:45: error: 'b' was not declared in this scope
   12 |   for (int i = 1; i <= n; ++i) cin >> a[i], b[i] = a[i];
      |                                             ^
a.cc:13:9: error: 'b' was not declared in this scope
   13 |   sort (b+1, b+1+n);
      |         ^
a.cc:14:32: error: 'sum' was not declared in this scope
   14 |   for (int i = 1; i <= n; ++i) sum[i] = sum[i-1] + b[i];
      |                                ^~~
a.cc:17:40: error: 'a' was not declared in this scope
   17 |     int pos = upper_bound (b+1, b+1+n, a[i]);
      |                                        ^
a.cc:26:20: error: 'sum' was not declared in this scope
   26 |         if (left + sum[pos+del] - sum[pos] <= 1LL * del * (a[i]+m)) ++ans;
      |                    ^~~
Language: C++

#include <cstdio>
#include <algorithm>

using namespace std;

int N, V, M, P, A[100005];
int lo, mid, hi, best;

bool works(int x) {
  int bigger = 0;
  long long left = M * (V-1);
  for (int i = 0; i < N; i++) {
    if (i == x-1) continue;
    if (A[i] > A[x-1] + M) {
      //printf("%d\n", i);
      left -= M;
      bigger++;
    } else if (bigger < P-1) {
      left -= M;
      bigger++;
    } else {
      left -= min(M, A[x-1] + M - A[i]);
    }
    //printf("%d %d %lld %d\n", x, i, left, bigger);
  }

  return (left <= 0 && bigger <= P-1);
}

int main() {
  scanf("%d %d %d %d", &N, &M, &V, &P);
  for (int i = 0; i < N; i++) scanf("%d", &A[i]);

  sort(A, A + N, greater<int>());

  lo = 0, hi = N;
  while (lo <= hi) {
    mid = (lo + hi) / 2;
    if (works(mid)) {
      best = mid;
      lo = mid + 1;
    } else {
      hi = mid - 1;
    }
  }

  printf("%d\n", best);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:34:18: error: 'greater' was not declared in this scope
   34 |   sort(A, A + N, greater<int>());
      |                  ^~~~~~~
a.cc:34:26: error: expected primary-expression before 'int'
   34 |   sort(A, A + N, greater<int>());
      |                          ^~~
Language: C++

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

int main() {
  cin.tie(0);
  cin.sync_with_stdio(0);

  int n, m, v, p;
  cin >> n >> m >> v >> p;

  vector<int> a(n);
  for(auto& x : a)
    cin >> x;

  sort(a.begin(), a.end(), greater<int>());

  int ans = p;
  int need = a[p - 1];
  int last = -1;
  ll have = 1ll * m * (v - p);
  ll sum = need;
  for(int i = p; i < n; ++i) {
    if(v <= p) {
      ans += (a[i] + m >= need);
    } else {
      if(a[i] == need) {
        ans++;
      } else if(p - 1 + n - i >= v) {
        if(a[i] + m >= need) {
          last = a[i];
          ans++;
        }
      } else if(a[i] == last) {
        ans++;
      } else if(a[i] + m > need) {
        int left = v - ((p - 1) + (n - x));
        int accepts = a[i] + m - 1;
        int middle = n - ((p - 1) + (n - x));
        if(left < middle) {
          ll fill = 1ll * middle * accepts;
          if(fill - sum >= 1ll * v * left) {
            ans++;
            last = a[i];
          }
        }
      }
    }
    sum += a[i];
  }

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

Compiler output:
a.cc: In function 'int main()':
a.cc:37:40: error: 'x' was not declared in this scope
   37 |         int left = v - ((p - 1) + (n - x));
      |                                        ^
Language: C

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

int cmp(const void* x, const void* y) {
	int a = *(const int*)x, b = *(const int*)y;
	return a > b ? -1 : a < b;
}

int N, M, V, P;
int A[114514];

int main(void) {
	int i;
	int kotae;
	int maki;
	if (scanf("%d%d%d%d", &N, &M, &V, &P) != 4) return 1;
	for (i = 0; i < N; i++) {
		if (scanf("%d", &A[i]) != 1) return 1;
	}
	qsort(A, N, sizeof(*A), cmp);
	maki = V - (P - 1);
	if (maki <= 0) maki = 1;
	kotae = P;
	while (kotae < N - maki) {
		int kugyu = A[kotae];
		if (A[kotae] + M >= A[P - 1]) {
			kotae++;
		} else {
			printf("%d\n", kotae);
			return 0;
		}
		while (kotae < N && A[kotae] == kugyu) kotae++;
	}
	while (kotae < N) {
		int kugyu = A[kotae];
		if (P - 1 - (kotae - (N - maki)) >= 0 && A[kotae] + M >= A[P - 1 - (kotae - (N - maki))]) {
			kotae++;
		} else {
			break;
		}
		while (kotae < N && A[kotae] = kugyu) { kotae++; maki++; }
		maki++;
	}
	printf("%d\n", kotae);
	return 0;
}

/*
下位の問題に投票しまくって投票されないやつを抜けるか？

入力例3

10 4 8 5
7 2 3 6 1 6 5 4 6 5

↓

7 6 6 6 5 5 4 3 2 1
---------
=======     =======

抜かすことを狙わないやつには投票することで、下位への投票数を減らせる

10 5 6 1
10 9 8 7 6 5 4 3 2 1

10 5 6 1
10 9 9 9 9 9 9 9 9 9

*/


Compiler output:
main.c: In function 'main':
main.c:41:46: error: lvalue required as left operand of assignment
   41 |                 while (kotae < N && A[kotae] = kugyu) { kotae++; maki++; }
      |                                              ^
Language: C++

#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
using namespace std;

using ll=long long;

template <typename T>
T in(){
    T x;
    cin >> x;
    return x;
}

template <typename T,typename U>
void forin(T* x,U n){
    for (U i=0;i<n;i++) cin >> x[i];
}

template <typename T>
int div1(T x) {
    return x%1000000007;
}

main(){
    int n=in<int>(),m=in<int>(),v=in<int>(),p=in<int>();
    vector<int> a(n);
    for (int i=0;i<n;i++) a[i]=in<int>();
    int ans=n;
    sort(a.begin(),a.end());
    for (int i=0;i<n-p;i++){
        int h=a[i]+m,vm=v*m-m-(p-1)*m;
        if (h<a[n-1-q+1])goto skip;
        for (int i2=i+1;vm>0;i2++){
            if(h<=a[i2]) goto skip;
            vm-=h-a[i2];
        }
        break;
        skip:
        ans--;
    }
    cout << ans << endl;
}

Compiler output:
a.cc:24:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   24 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:32:21: error: 'q' was not declared in this scope
   32 |         if (h<a[n-1-q+1])goto skip;
      |                     ^
Language: C++

//#include "pch.h"
#include <iostream>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <bitset>
#include <limits.h>
#include <string>
#include <deque>
#include <cmath>
#include <bitset>

using namespace std;
typedef long long ll;
typedef pair<int, int> P;

#define rip(i, n, s) for (int i = (s);i < (int)( n ); i++)
#define mpa make_pair
#define all(a) a.begin(), a.end()

template<typename T>
void vdeb(vector<T> &da) {
	int size = da.size();
	for (int i = 0;i < size;i++) {
		if (i == size - 1) {
			cout << da[i] << endl;
		}
		else {
			cout << da[i] << ' ';
		}
	}
}
template<typename T>
void vvdeb(vector<T> &da) {
	int size = da.size();
	for (int i = 0;i < size;i++) {
		vdeb(da[i]);
	}
}

int n, v, p;
ll m;

bool check(vector<ll> &da, int now) {
	ll h = (ll)n - now + p - 1;
	if (p - v >= 0 || h >= v) {
		return (da[now] + m >= da[p - 1]);
	}
	else {
		if (da[now] + m - da[p - 1] < 0) {
			return false;
		}
		ll sum = 0;
		rip(i, now, p) {
			sum += da[now] + m - da[i];
		}
		ll gg = v - h;
		return (gg*m <= sum);
	}
}

int nibu(vector<ll> &da, int ng, int ok) {
	if (ng - ok == 1) {
		return ok;
	}
	int mi = (ng + ok) / 2;
	if (check(da, mi)) {
		return nibu(da, ng, mi);
	}
	else {
		return nibu(da, mi, ok);
	}
}
a
int main() {
	cin >> n >> m >> v >> p;
	vector<ll> da(n);
	rip(i, n, 0) {
		cin >> da[i];
	}
	sort(all(da));
	reverse(all(da));
	cout << nibu(da, n, p - 1) + 1 << endl;
}

Compiler output:
a.cc:75:1: error: 'a' does not name a type
   75 | a
      | ^
Language: C++

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

using LL = long long;

int main () {
  int n, m, v, p; 
  cin >> n >> m >> v >> p;
  vector <int> a(n), b(n);
  vector <LL> sum(n);
  for (int i = 0; i < n; ++i) cin >> a[i], b[i] = a[i];
  sort (b.begin(), b.end());
  for (int i = 0; i < n; ++i) sum[i] = b[i];
  for (int i = 1; i < n; ++i) sum[i] += sum[i-1];
  int ans = 0;
  for (int i = 0; i < n; ++i) {
    int pos = upper_bound (b.begin(),b.end(), a[i]);
    int cnt = n - pos - 1;
    if (cnt < p) ++ans;
    else if (a[i]+m < b[pos+cnt-p+1]) continue;
    else {
      LL used = 1LL * (n-(cnt-p+1)) * m;
      if (used >= 1LL * v * m) ++ans;
      else {
        LL left = 1LL * v * m - used;
        if (left + sum[pos+(n-(cnt-p+1))] - sum[pos] <= a[i]+m) ++ans;
      }
    }
  }
  cout << ans << endl;
  return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:17:27: error: cannot convert '__gnu_cxx::__normal_iterator<int*, std::vector<int> >' to 'int' in initialization
   17 |     int pos = upper_bound (b.begin(),b.end(), a[i]);
      |               ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
      |                           |
      |                           __gnu_cxx::__normal_iterator<int*, std::vector<int> >
Language: C++

#include <cmath>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <list>
#include <time.h>
#include <math.h>
#include <random>
#include <deque>
#include <queue>
#include <cassert>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <bitset>
#include <sstream>
#include <chrono>
#include <cstring>
 
using namespace std;
 
typedef long long ll;

#define int long long

int main() {
	int n, m, v, p;
	cin >> n >> m >> v >> p;
	vector <int> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	map <int, int> poss;
	sort(a.begin(), a.end());
	reverse(a.begin(), a.end());
	int target = a[p - 1];
	int pos = -1;
	for (int i = p - 1; i < n; i++) {
		if (a[i] == target) {
			pos = i;
			continue;
		}
		break;
	}
	for (int i = 0; i < n; i++) {
		if (i + 1 <= p) {
			poss[a[i]] = true;
			continue;
		}
		 int vv = v;
		 vv -= p - 1;
		 vv -= n - i;
		 if (vv <= 0 && a[i] + m >= target) {
			 poss[a[i]] = true;
		 } else {
			 ll dist = i - 1 - (p - 1) + 1; 
			 ll need = m * vv;
			 ll val = need / dist;
			 if (need % dist == 0) {
				 if (a[pos] + val <= a[i] + m) {
					 poss[a[i]] = true;
				 }
			 } else {
				 int dist_of = i - 1 - pos + 1;
				 if (dist_of <= need % dist) {
					 val++;
				 }
				 if (a[pos] + val <= a[i] + m) {
					 poss[a[i]] = true;
				 }
			 }
		 }
	}
	int cnt = 0;
	for (int i = 0; i < n; i++) {
		if (poss[a[i]]) {
			cnt++;
		}
	}
	cout << cnt << '\n';
	return 0;
}

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

#include <cmath>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <list>
#include <time.h>
#include <math.h>
#include <random>
#include <deque>
#include <queue>
#include <cassert>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <bitset>
#include <sstream>
#include <chrono>
#include <cstring>
 
using namespace std;
 
typedef long long ll;

#define int long long

int main() {
	int n, m, v, p;
	cin >> n >> m >> v >> p;
	vector <int> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	map <int, int> poss;
	sort(a.begin(), a.end());
	reverse(a.begin(), a.end());
	int target = a[p - 1];
	int pos = -1;
	for (int i = p - 1; i < n; i++) {
		if (a[i] == target) {
			pos = i;
			continue;
		}
		break;
	}
	for (int i = 0; i < n; i++) {
		if (i + 1 <= p) {
			poss[a[i]] = true;
			continue;
		}
		 int vv = v;
		 vv -= p - 1;
		 vv -= n - i;
		 if (vv <= 0 && a[i] + m >= target) {
			 poss[a[i]] = true;
		 } else {
			 ll dist = i - 1 - (p - 1) + 1; 
			 ll need = m * vv;
			 ll val = need / dist;
			 if (need % dist == 0) {
				 if (a[pos] + val <= a[i]) {
					 poss[a[i]] = true;
				 }
			 } else {
				 int dist_of = i - 1 - pos + 1;
				 if (dist_of <= need % dist) {
					 val++;
				 }
				 if (a[pos] + val <= a[i] + m) {
					 poss[a[i]] = true;
				 }
			 }
		 }
	}
	int cnt = 0;
	for (int i = 0; i < n; i++) {
		if (poss[a[i]]) {
			cnt++;
		}
	}
	cout << cnt << '\n';
	return 0;
}

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

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> // Common file  
#include <ext/pb_ds/tree_policy.hpp>  
#include <functional> // for less  
using namespace         std;
#define                 int long long
#define                 pb push_back
#define                 mp make_pair
#define st(arr,a)       memset(arr,a,sizeof arr)
#define                 nl cout<<'\n'
#define bitcount(x)     __builtin_popcountll(x)
const int MOD = 1000000007ll;
#define forn(i,a,b)     for(int i=a;i<=b;i++)
#define rfor(i,a,b)     for(int i=a;i>=b;i--)
#define all(x)          x.begin() , x.end()
#define pi pair<int,int>
#define X first
#define Y second
#define sz(A) (int)A.size()
#define N 1014159
#define  vi vector<int>
#define  v  vector
#define die exit(0)
#define alln(arr) arr+1 , arr+1+n
using namespace __gnu_pbds;  
typedef tree<int, null_type, less<int>, rb_tree_tag,  
            tree_order_statistics_node_update> oset; 

// order_of_key (k) : Number of items strictly smaller than k .
// find_by_order(k) : K-th element in a set (counting from zero).

#define in input_int()
#define ins input_string()
int input_int(){int a;cin>>a;return a;}
string input_string(){string s;cin>>s;return s;}
int dx[4] = {0, 1, 0, -1};
int dy[4] = {1, 0, -1, 0};



int n,m,k,a,b,c,d,x,y,arr[N];
string s;

int dp[6001][18001];

void solve()
{
    i
}


signed main() 
{
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); 
    int t = 1;
    //cin>>t;
    forn(i,1,t)
    {
        solve();
        nl;
    }



    return 0;

}
//       clang++ c.cpp ; ./a.out < a.txt ;

Compiler output:
a.cc: In function 'void solve()':
a.cc:48:5: error: 'i' was not declared in this scope
   48 |     i
      |     ^
Language: C

#include<iostream>
#include<vector>
#include<algorithm>

int main() {
  std::cin.tie(0); std::ios::sync_with_stdio(false);
  int N; std::cin >> N;
  char buf[1002];
  buf[N] = '\n';
  buf[N+1] = 0;
  if(N >= 4 && N%2 == 0) {
    char const* p[2] = {"abcc", 
                        "abdd"};
    for(int i = 0; i < N; ++i) {
      int x = (i/2)*2, y = i%2;
      std::fill_n(buf, N, '.');
      for(int j = 0; j < 4; ++j) buf[(x+j)%N] = p[y][j];
      std::cout << buf;
    }
  } else if(N%3 == 0) {
    char const* p[3] = {"aab",
                        "c.b",
                        "cdd"};
    for(int i = 0; i < N; ++i) {
      int x = (i/3)*3, y = i%3;
      std::fill_n(buf, N, '.');
      for(int j = 0; j < 3; ++j) buf[(x+j)%N] = p[y][j];
      std::cout << buf;
    }
  } else if(N >= 17) {
    char const* p[2] = {"abccefgg",
                        "abddefhh"};
    int n = N-9;
    for(int i = 0; i < n; ++i) {
      int x = (i/2)*2, y = i%2;
      std::fill_n(buf, N, '.');
      for(int j = 0; j < 8; ++j) buf[(x+j)%n] = p[y][j];
      std::cout << buf;
    }
    std::fill_n(buf, N, '.');
    char const *q[3] = {"aabeefiij",
                        "c.bg.fk.j",
                        "cddghhkll"};
    for(int i = 0; i < 9; ++i) {
      int x = (i/3)*3, y = i%3;
      for(int j = 0; j < 9; ++j) buf[n+(x+j)%9] = q[y][j];
      std::cout << buf;
    }
  } else { // N=1,2,5,7,11,13
    std::cout << "-1\n";
  }
  return 0;
}




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

#include <iostream>
using namespace std;

int main() {
	int N;
  	cin >> N;
  	if (N % 3 == 0){
      	for (int i = 0; i < N / 3; i++){
          	for (int j = 0; j < N / 3; j++){
              	cout << "a" << "a" << "b";
            }
          	cout << endl;
          	for (int j = 0; j < N / 3; j++){
              	cout << "d" << "." << "b";
            }
          	cout << endl;
          	for (int j = 0; j < N / 3; j++){
              	cout << "d" << "c" << "c";
            }
          	cout << endl;
        }
    }
  	else if (N % 2 == 0){
      	int flag[N][N];
      	for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) int[i][j] = 0;
      	for (int i = 0; i < N / 2; i++){
          	flag[i][i * 2] = 1;
          	flag[i][i * 2 + 1] = 1;
        }
      	for (int i = N / 2; i < N; i++){
          	flag[i][(i - N / 2) * 2] = 1;
          	flag[i][(i - N / 2) * 2 + 1] = 1;
        }
      	for (int i = 0; i < N; i++) {
          	for (int j = 0; j < N; j++){
              	if (flag[i][j] == 0) cout << "." << endl;
              	if (flag[i][j] == 1) cout << "a" << endl;
            }
        }
    }
  	else cout << -1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:68: error: structured binding declaration cannot have type 'int'
   25 |         for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) int[i][j] = 0;
      |                                                                    ^~~
a.cc:25:68: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:25:71: error: expected initializer before '[' token
   25 |         for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) int[i][j] = 0;
      |                                                                       ^
a.cc:25:71: error: expected ';' before '[' token
Language: C++

#include <iostream>
using namespace std;

int main() {
	int N;
  	cin >> N;
  	if (N % 3 == 0){
      	for (int i = 0; i < N / 3; i++){
          	for (int j = 0; j < N / 3; j++){
              	cout << "a" << "a" << "b";
            }
          	cout << endl;
          	for (int j = 0; j < N / 3; j++){
              	cout << "d" << "." << "b";
            }
          	cout << endl;
          	for (int j = 0; j < N / 3; j++){
              	cout << "d" << "c" << "c";
            }
          	cout << endl;
        }
    }
  	else if (N % 2 == 0){
      	int flag[N][N];
      	for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) int[i][j] = 0;
      	for (int i = 0; i < N / 2; i++){
          	flag[i][i * 2] = 1;
          	flag[i][i * 2 + 1] = 1;
        }
      	for (int i = N / 2; i < N; i++){
          	flag[i][(i - N / 2) * 2] = 1;
          	flag[i][(i - N / 2) * 2 + 1] = 1;
        }
      	for (int i = 0; i < N; i++) {
          	for (int j = 0; j < N; j++){
              	if (flag[i][j] == 0) cout << "." << endl;
              	if (flag[i][j] == 1) cout << "a" << endl;
            }
        }
    }
  	else if cout << -1 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:68: error: structured binding declaration cannot have type 'int'
   25 |         for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) int[i][j] = 0;
      |                                                                    ^~~
a.cc:25:68: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:25:71: error: expected initializer before '[' token
   25 |         for (int i = 0; i < N; i++) for (int j = 0; j < N; j++) int[i][j] = 0;
      |                                                                       ^
a.cc:25:71: error: expected ';' before '[' token
a.cc:41:17: error: expected '(' before 'cout'
   41 |         else if cout << -1 << endl;
      |                 ^~~~
      |                 (
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pi;
typedef vector<pi> vpi;
typedef long double ld;
#define pb emplace_back
#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define ALL(x) x.begin(), x.end()
#define SZ(x) (ll)x.size()
#define f first
#define s second
const ll MOD = 1e9+7;
const ll INF = 1e9;
const ll MAXN = 1100;


char grid[MAXN][MAXN];

void run3 (int R, int C){
    grid[R][C] = grid[R][C+1] = 'a';
    grid[R+1][C+2] = grid[R+2][C+2] = 'a';
}

void donine(int row){
    for (int i=0;i<9;i+=3)for (int j=0;j<9;j+=3)run3(row+i,row+j);
}

void run4(int R, int C){
    grid[R][C] = grid[R+1][C] = 'a';
    grid[R][C+1] = grid[R+1][C+1] = 'b';
    grid[R+2][C] = grid[R+2][C+1] = 'c';
    grid[R+3][C] = grid[R+3][C+1] = 'd';
    grid[R][C+2] = grid[R][C+3] = 'e';
    grid[R+1][C+2] = grid[R+1][C+3] = 'f';
    grid[R+2][C+2] = grid[R+3][C+2] = 'g';
    grid[R+2][C+3] = grid[R+3][C+3] = 'h';
}

void out(int _N){
    for (int i=1;i<=_N;++i){
        for(int j=1;j<=_N;++j)cout<<grid[i][j];
        cout<<'\n';
    }
}

void doseven(int R){
    run3(R,R);
    run3(R+3,R+3);
    grid[R][C+6] = grid[R+1][C+6] = 'b';
    grid[R+2][C+6] = grid[R+3][C+6] = 'c';
    grid[R+4][C+6] = grid[R+5][C+6] = 'd';
    grid[R+6][C] = grid[R+6][C+1] = 'b';
    grid[R+6][C+2] = grid[R+6][C+3] = 'c';
    grid[R+6][C+4] = grid[R+6][C+5] = 'd';
}

int main(){
    int N;
    cin>>N;
    int R = N;
    
    for (int i=1;i<=N;++i)for (int j=1;j<=N;++j)grid[i][j]='.';

    if (N==7){
        doseven(1);
        out(R);
        return 0;
    }else if (N == 11){
        doseven(1);
        run4(8,8);
        out(R);
        return 0;
    }else if (N == 14){
        doseven(1);
        doseven(8);
        out(R);
        return 0;
    }else if (N == 19){
        doseven(1);
        run4(8,8);
        run4(12,12);
        run4(16,16);
        out(R);
        return 0;
    }else if (N == 23){
        doseven(1);
        doseven(8);
        donine(15);
        out(R);
        return 0;
    }

    if (N%3==0){ // 1 per row
        while (N!=0){
            run3(N-2,N-2);
            N -= 3;
        }
        out(R);
        return 0;
    }
    while (N>8&&N%4!=0){
        donine(N-8);
        N -= 9;
    }
    if (N<0 || N%4!=0){ 
        cout<<-1;
        return 0;
    }
    while (N){ // Mix of 4 and 9
        run4(N-3,N-3);
        N -= 4;
    }
    out(R);
    
}

Compiler output:
a.cc: In function 'void doseven(int)':
a.cc:53:13: error: 'C' was not declared in this scope
   53 |     grid[R][C+6] = grid[R+1][C+6] = 'b';
      |             ^
Language: C++

#include<bits/stdc++.h>
int main()
{
 int n, i, j;
  scanf("%d", &n);
  if(n%3)
    printf("-1");
  else
  {
   for(i=1;i<=n;i++)
   {
     for(j=1;j<=n;j++)
     {
       if(((i-1)/3)==((j-1)/3))
       {
         if((((i-1)%3)==0)+((j-1)%3==0)==1)
           printf("a");
         else
            printf(".")
       }
       else
       {
       printf(".");}
     }
     printf("\n");
   }
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:24: error: expected ';' before '}' token
   19 |             printf(".")
      |                        ^
      |                        ;
   20 |        }
      |        ~
Language: C++

#include<bits/stdc++.h>
using namespace std;
const string S4[4] = {"abcc", "abdd", "ccab", "ddab"};
const string S5[5] = {"abbcc", "ad..a", "bd..a", "b.eez", "oorrz"};
const string S6[6] = {"oorrzz", ".a.b.c", ".a.b.c", "d.e.f.", "d.e.f.", "oorrzz"};
const string S7[7] = {".oorrzz", "oabb...", "oa.c...", "rddc...", "r...abb", "z...a.c", "z...ddc"};
char s[1010][1010];
inline void solve(int&n, int x) {
    if(x == 4)
        for(int i=0; i<x; i++)
            for(int j=0; j<x; j++)
                s[n + i][n + j]=S4[i][j];
    if(x==5)
        for(int i=0; i<x; i++)
            for(int j=0; j<x; j++)
                s[n + i][n + j] = S5[i][j];
    if(x==6)
        for(int i=0; i<x; i++)
            for(int j=0; j<x; j++)
                s[n + i][n + j] = S6[i][j];
    if(x==7)
        for(int i=0; i<x; i++)
            for(int j= 0; j<x; j++)
                s[n + i][n + j] = S7[i][j];
    n+=x;
}
int main() {
    int n=ri;
    if(n<=2) return puts("-1"), 0;
    if(n==3) {
        puts("a..");
        puts("a..");
        puts(".bb");
        return 0;
    }
    for(int i=1; i<=n; i++)
        for(int j=1; j<= n; j++)
            s[i][j] = '.';
    int x = n % 4, N = 1;
    if(x==0) 
	solve(N, 4);
    if(x==1) 
	solve(N, 5);
    if(x==2) 
	solve(N, 6);
    if(x==3) 
	solve(N, 7);
    while(N<=n)
	solve(N, 4);
    for(int i=1; i<=n; i++) {
        for(int j=1; j<=n; j++)
            putchar(s[i][j]);
        puts("");
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:11: error: 'ri' was not declared in this scope
   28 |     int n=ri;
      |           ^~
Language: C++

for(int i=t+1;i<=n;i++)
            {
                int k=s;s^=1;
                for(int j=t+1;j<=n;j+=2)
                {
                    a[i][j]=a[i][j+1]=k;
                    k^=1;
                }
            }

Compiler output:
a.cc:1:1: error: expected unqualified-id before 'for'
    1 | for(int i=t+1;i<=n;i++)
      | ^~~
a.cc:1:15: error: 'i' does not name a type
    1 | for(int i=t+1;i<=n;i++)
      |               ^
a.cc:1:20: error: 'i' does not name a type
    1 | for(int i=t+1;i<=n;i++)
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll, ll> pll;
#define PI 3.14159265358979
#define rep(i, n) for(int i = 0; i < (n); ++i)
#define repp(i, s, e) for(int i = (s); i <= (e); ++i)
#define sz(x) ((int)x.size())
#define all(x) x.begin(), x.end()
#define FAST_IO() ios::sync_with_stdio(0); cin.tie(0)
template<typename T>
ostream& operator<<(ostream &os, const vector<T> &v) { for (auto x : v) os << x << " "; return os << "\n"; }
template<class U, class V>
ostream& operator<<(ostream &os, const pair<U, V> &p) { return os << "(" << p.first << "," << p.second << ")";}

const int MAXN = 1e3 + 5;
int N;
char A[MAXN][MAXN] = {'.'};

void three1(int p, int q) {
    A[p + 0][q + 1]
}

void three2(int p, int q) {
    
}

void four3(int p, int q) {
    
}

int main() {
    cin >> N;
    if(N % 3 == 0) {
        
    } else if(N % 4 == 0) {
        
    } else if(N % 3 == 1 && N > 7) { // N = 3n + 1
        // N = 3 * (n - 1) + 4 * 1
        
    } else if(N % 3 == 2 && N > 7) { // N = 3n + 2
        // N = 3 * (n - 2) + 4 * 2
        
    } else {
        cout << "-1\n";
        return 0;
    }
}

Compiler output:
a.cc: In function 'void three1(int, int)':
a.cc:22:20: error: expected ';' before '}' token
   22 |     A[p + 0][q + 1]
      |                    ^
      |                    ;
   23 | }
      | ~
Language: C++

#include <bits/stdc++.h>
#include <windows.h>
#include <time.h>
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;
typedef vector<int> VI;
typedef vector<VI> VVI;
const ll MOD = 1000000007;
const ll INF = 2147483647;
const ll LLINF = 9223372036854775807;
#define REP(i, n) for(int i = 0; i < n; i++)
#define ALL(v) v.begin(), v.end()

char m3[3][4] = {
	"aab",
	"c.b",
	"cdd"
};

char m4[4][5] = {
	"aabc",
	"ddbc",
	"bcaa",
	"bcdd"
};

char m5[5][6] = {
	"aabbc",
	"d.eec",
	"dj..f",
	"gj..f",
	"ghhii"
};

char m6[6][7] = {
	"aab..f",
	"c.b..f",
	"cddee.",
	".ffaab",
	"e..c.b",
	"e..cdd",
};

char m7[7][8] = {
	"aa.bb.c",
	".ii..jc",
	"h..mmj.",
	"h.n...d",
	".ln...d",
	"gl..kk.",
	"g.ff.ee"
};

int main() {
	int n; cin >> n;
	vector<vector<char>> ans(n, vector<char>(n,'.'));
	if (n <= 2) {
		cout << -1;
		return 0;
	}
	if (n == 3) {
		REP(i, 3)REP(j, 3){
			ans[i][j] = m3[i][j];
		}
	}
	if (n >= 4) {
		REP(i, (n / 4) - 1) {
			REP(j, 4)REP(k, 4)
				ans[j + (i * 4)][k + (i * 4)] = m4[j][k];
		}
		if (n % 4 == 0) {
			REP(i, 4)REP(j, 4)
				ans[i + n - (n % 4) - 4][j + n - (n % 4) - 4] = m4[i][j];
		}
		if (n % 4 == 1) {
			REP(i, 5)REP(j, 5)
				ans[i + n - (n % 4) - 4][j + n - (n % 4) - 4] = m5[i][j];
		}
		if (n % 4 == 2) {
			REP(i, 6)REP(j, 6)
				ans[i + n - (n % 4) - 4][j + n - (n % 4) - 4] = m6[i][j];
		}
		if (n % 4 == 3) {
			REP(i, 7)REP(j, 7)
				ans[i + n - (n % 4) - 4][j + n - (n % 4) - 4] = m7[i][j];
		}
	}
	REP(i, n) {
		REP(j, n)
			cout << ans[i][j];
		cout << endl;
	}
}

Compiler output:
a.cc:2:10: fatal error: windows.h: No such file or directory
    2 | #include <windows.h>
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(ll i=0;i<(n);++i)
#define all(a) (a).begin(),(a).end()
#define dunk(a) cout << (a) << endl
using namespace std;
typedef long long ll;

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

    if(N == 2){
        cout << -1 << endl;
    }

    else{
    string table3[3] = {"a..", "a..", ".aa"};
    string table4[4] = {"abcc", "abdd", "eegh", "ffgh"};
    string table5[5] = {"aaffh", "b..gh", "b..gi", "cdd.i", "ceejj"};
    string table6[6] = {"aabb..", "b..zz.", "ba....", ".a..aa", "..a..b", "..a..b"};
    string table7[7] = {"abc....", "abc....", "def....", "def....", "g..hhii", "g..jjkk", ".llmmnn"};

    if(N==3){
        rep(i,N){
            cout << table3[i] << endl;
        }
    }

    else if(N==4){
        rep(i,N){
            cout << table4[i]  << endl;
        }
    }

    else if(N==5){
        rep(i,N){
            cout << table5[i]  << endl;
        }
    }

    else if(N==6){
        rep(i,N){
            cout << table6[i] << endl;
        }
    }

    else if(N==7){
        rep(i,N){
            cout << table7[i] << endl;
        }
    }

    else{
        char tablebase[N][N] = {'.'};
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:56:2: error: expected '}' at end of input
   56 | }
      |  ^
a.cc:8:11: note: to match this '{'
    8 | int main(){
      |           ^
Language: C++

G = [nil, nil, nil,
  %w(
    a..
    a..
    .bb
  ),
  %w(
    aabc
    ddbc
    efgg
    efhh
  ),
  %w(
    abbcc
    ad..e
    fd..e
    f.ggh
    iijjh
  ),
  %w(
    aabc..
    ddbc..
    ..eefg
    ..hhfg
    ij..kk
    ij..ll
  ),
  %w(
    aabbcc.
    ..de..f
    ..de..f
    gh....i
    gh....i
    jj..kkl
    ..mmnnl
  )
]

N = gets.to_i
A = N.times.map{?. * N}

def w x,j
  G[x].each do |g|
    s = ?. * N
    s[j,x] = g
    puts s
  end
end

if N == 2
  p -1
elsif N == 3
  w 3,0
else
  m = N%4+4
  w m,0
  (N/4-1).times do |j|
    w 4,m+j*4
  end
end

Compiler output:
a.cc:1:1: error: 'G' does not name a type
    1 | G = [nil, nil, nil,
      | ^
a.cc:42:1: error: 'def' does not name a type
   42 | def w x,j
      | ^~~
Language: C++

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

int main() {
  int n;
  cin >> n;
  vector<vector<char>> v(n, vector<char>(n)), a, b, c;
  a = {{'a','a','a','a','a'},{'a','a','a','.','a'},{'a','.','.','a','a'},{'a','.','.','a','a'},{'a','a','a','a','a'}};
  b = {{'.','.','a','a','a','a'},{'.','.','a','a','a','a'},{'a','a','.','.','a','a'},{'a','a','.','.','a','a'},{'a','a','a','a','.','.'},{'a','a','a','a','.','.'}};
  c = {{'a','a','a','a','a','a','.'},{'a','a','.','a','a','.','a'},{'.','.','a','.','.','a','a'},{'.','.','a','.','.','a','a'},{'a','a','.','a','a','.','a'},{'.','.','a','.','.','a','a'},{'.','.','a','.','.','a','a'}};
  if(n == 2) cout << -1 << endl;
  else{
    if(n == 3) v = {{'a', 'a', '.'},{'.', '.', 'a'},{'.','.', 'a'}};
    else{
      for(int i = 0; i < n - 4 - (n % 4); ++i){
        for(int j = 0; j < n; ++j){
          if(i / 4 == j / 4) v.at(i).at(j) = 'a';
          else v.at(i).at(j) = '.';
        }
      }
      if(n % 4 == 0){
      for(int i = n - 4; i < n; ++i){
        for(int j = 0; j < n; ++j){
          if(i / 4 == j / 4) v.at(i).at(j) = 'a';
          else v.at(i).at(j) = '.';
          }
        }
      }
      else if(n % 4  == 1){
        for(int i = n - 5; i < n; ++i){
          for(int j = 0; j < n; ++j){
            if(j < n - 5) v.at(i).at(j) = '.';
            else v.at(i).at(j) = a.at(i - n + 5).at(j - n + 5);
          }
        }
      }
      else if(n % 4  == 2){
        for(int i = n - 6; i < n; ++i){
          for(int j = 0; j < n; ++j){
            if(j < n - 6) v.at(i).at(j) = '.';
            else v.at(i).at(j) = b.at(i - n + 6).at(j - n + 6);
          }
        }
      }
      else if(n % 4  == 3){
        for(int i = n - 7; i < n; ++i){
          for(int j = 0; j < n; ++j){
            if(j < n - 7) v.at(i).at(j) = '.';
            else v.at(i).at(j) = c.at(i - n + 7).at(j - n + 7);
          }
        }
      }
    for(int i = 0; i < n; ++i){
      for(int j = 0; j < n; ++j) cout << v.at(i).at(j);
      cout << endl;
    }
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:58:2: error: expected '}' at end of input
   58 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include<bits/stdc++.h>

using namespace std;

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int n;
	cin >> n;
	if(i==2){
		cout << -1 << "\n";
		return 0;
	}
	if(n%3==0){
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				if(i%3==2){
					if(j%3==0){
						cout << ".";
					}else{
						cout << "a";
					}
				}else{
					if(j%3==0){
						cout << "a";
					}else{
						cout << ".";
					}
				}
			}
			cout << "\n";
		}
		return 0;
	}
	vector<vector<char>> p4=
	{
		{'a','a','c','d'},
		{'b','b','c','d'},
		{'c','d','a','a'},
		{'c','d','b','b'}
	};
	
	vector<vector<char>> p5=
	{
		{'a','a','d','e','e'},
		{'b','b','d','.','f'},
		{'c','c','g','g','f'},
		{'.','.','a','b','c'},
		{'.','.','a','b','c'}
	};
	vector<vector<char>> p7=
	{
		{'a','a','.','a','a','.','a'},
		{'.','b','b','.','.','b','a'},
		{'a','.','a','a','.','b','.'},
		{'a','.','.','.','a','.','a'},
		{'.','b','.','.','a','.','a'},
		{'a','b','.','.','b','b','.'},
		{'a','.','a','a','.','a','a'}
	};
	vector<vector<char>> res(n,vector<char>(n,'.'));
	vector<vector<int>> dec(n+10);
	dec[4].push_back(4);
	dec[5].push_back(5);
	dec[7].push_back(7);
	for(int i=8;i<=n;i++){
		if(dec[i-4].size()>0){
			dec[i]=dec[i-4];
			dec[i].push_back(4);
		}else if(dec[i-5].size()>0){
			dec[i]=dec[i-5];
			dec[i].push_back(5);
		}else if(dec[i-7].size()>0){
			dec[i]=dec[i-7];
			dec[i].push_back(7);
		}
	}
	int ind=0;
	for(int d:dec[n]){
		if(d==4){
			for(int i=0;i<d;i++){
				for(int j=0;j<d;j++){
					res[i+ind][j+ind]=p4[i][j];
				}
			}
		}
		if(d==5){
			for(int i=0;i<d;i++){
				for(int j=0;j<d;j++){
					res[i+ind][j+ind]=p5[i][j];
				}
			}
		}
		if(d==7){
			for(int i=0;i<d;i++){
				for(int j=0;j<d;j++){
					res[i+ind][j+ind]=p7[i][j];
				}
			}
		}
		ind+=d;
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cout << res[i][j];
		}
		cout << "\n";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:12: error: 'i' was not declared in this scope
   11 |         if(i==2){
      |            ^
Language: C++

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

int a[3];

int main(){
    int n;
    cin >> n;
    if (n == 2){
        cout << - 1 << endl;
        return 0;
    }
    if (n % 3 == 0){
        vector<vector<char>> ans(n, vector<char>(n, '.'));
        vector<vector<char>> x = {{'a', 'a', 'b'}, {'b', '.', 'a'}, {'b', 'a', 'a'}};
        for (int i = 0; i < n; i += 3){
            for (int j = 0; j < 3; j++){
                for (int k = 0; k < 3; k++) ans[i + j][i + k] = x[j][k];
            }
        }
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++){
                cout << ans[i][j];
            }
            cout << endl;
        }
        return 0;
    }
    else {
        vector<vector<char>> x = {{'a', 'a', 'b'}, {'b', '.', 'a'}, {'b', 'a', 'a'}};
        vector<vector<char>> y = {{'a', 'b', 'a', 'a'}, {'a', 'b', 'c', 'c'}, {'c', 'c', 'a', 'b'}, {'d', 'd', 'a', 'b'}};
        vector<vector<char>> z = {{'a', 'b', 'b', 'a', 'a'}, {'a', '.', '.', 'b', 'c'}, {'b', 'b', '.', 'b', 'c'}, {'a', 'c', 'c', '.', 'b'}, {'a', '.', 'a', 'a', 'b'}};
        vector<vector<char>> ans(n, vector<char>(n, '.'));
        int now = 0;
        while (now < n){
            if ((n - now) % 3 == 0){
                for (int j = 0; j < 3; j++){
                    for (int k = 0; k < 3; k++) ans[now + j][now + k] = x[j][k];
                }
                now += 3;
            }
            else if ((n - now) % 3 == 1){
                for (int j = 0; j < 4; j++){
                    for (int k = 0; k < 4; k++) ans[now + j][now + k] = y[j][k];
                }
                now += 4;
            }
            else ((n - now) % 3 == 2){
                for (int j = 0; j < 5; j++){
                    for (int k = 0; k < 5; k++) ans[now + j][now + k] = z[j][k];
                }
                now += 5;
            }
        }
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++){
                cout << ans[i][j];
            }
            cout << endl;
        }
        return 0;
    } 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:48:38: error: expected ';' before '{' token
   48 |             else ((n - now) % 3 == 2){
      |                                      ^
      |                                      ;
Language: C++

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

int a[3];

int main(){
    int n;
    cin >> n;
    if (n == 2){
        cout << - 1 << endl;
        return 0;
    }
    if (n % 3 == 0){
        vector<vector<char>> ans(n, vector<char>(n, '.'));
        vector<vector<char>> x = {{'a', 'a', 'b'}, {'b', '.', 'a'}, {'b', 'a', 'a'}};
        for (int i = 0; i < n; i += 3){
            for (int j = 0; j < 3; j++){
                for (int k = 0; k < 3; k++) ans[i + j][i + k] = x[j][k];
            }
        }
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++){
                cout << ans[i][j];
            }
            cout << endl;
        }
        return 0;
    }
    else {
        vector<vector<char>> x = {{'a', 'a', 'b'}, {'b', '.', 'a'}, {'b', 'a', 'a'}};
        vector<vector<char>> y = {{'a', 'b', 'a', 'a'}, {'a', 'b', 'c', 'c'}, {'c', 'c', 'a', 'b'}, {'d', 'd', 'a', 'b'}};
        vector<vector<char>> z = {{'a', 'b', 'b', 'a', 'a'}, {'a', '.', '.', 'b', 'c'}, {'b', 'b', '.', 'b', 'c'}, {'a', 'c', 'c', '.', 'b'}, {'a', '.', 'a', 'a', 'b'}};
        vector<vector<char>> ans(n, vector<char>(n, '.'));
        int now = 0;
        while (now < n){
            if (n - now){
                for (int j = 0; j < 3; j++){
                    for (int k = 0; k < 3; k++) ans[now + j][now + k] = x[j][k];
                }
                now += 3;
            }
            else if (){
                for (int j = 0; j < 4; j++){
                    for (int k = 0; k < 4; k++) ans[now + j][now + k] = x[j][k];
                }
                now += 4;
            }
            else (){
                for (int j = 0; j < 5; j++){
                    for (int k = 0; k < 5; k++) ans[now + j][now + k] = x[j][k];
                }
                now += 5;
            }
        }
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++){
                cout << ans[i][j];
            }
            cout << endl;
        }
        return 0;
    } 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:22: error: expected primary-expression before ')' token
   42 |             else if (){
      |                      ^
a.cc:48:19: error: expected primary-expression before ')' token
   48 |             else (){
      |                   ^
Language: C++

2 -> ng
3n -> ok(1)
4n -> ok(3n)
3n + 2 -> ok

n = 3m -> ok(q(n) = 1 or m)
n = 4m -> ok(q(n) = 3m)

q(1) = 1
q(n-2m) == q(m) -> q(n) = 3 x q(m)


----------------------------------------
2 x

3 o (1, 3)
aa.
..b
..b

aab
d.b
dcc

4 o (3)
aacd
bbcd
cdbb
cdaa

5 o (3)
aabbc
hii.c
h..jd
g..jd
gffee

6 o
aa....
..b...
..b...
...bb.
.....a
.....a

aa.cc.
..b..d
..b..d
aa.cc.
..b..d
..b..d

7 
.......
.......
.......
.......
.......
.......
.......


Compiler output:
a.cc:1:1: error: expected unqualified-id before numeric constant
    1 | 2 -> ng
      | ^
Language: C++

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

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

#define fr first
#define sc second

char ret[1002][1002];
void solve(int x,int y){
	if(y == 4){
		ret[x][x] = 'a';
		ret[x+1][x] = 'a';
		ret[x][x+1] = 'b';
		ret[x+1][x+1] = 'b';
		ret[x][x+2] = 'c';
		ret[x][x+3] = 'c';
		ret[x+1][x+2] = 'd';
		ret[x+1][x+3] = 'd';
		ret[x+2][x] = 'e';
		ret[x+2][x+1] = 'e';
		ret[x+3][x] = 'f';
		ret[x+3][x+1] = 'f';
		ret[x+2][x+2] = 'g';
		ret[x+3][x+2] = 'g';
		ret[x+2][x+3] = 'h';
		ret[x+3][x+3] = 'h';
	}
	if(y == 5){
		for(int i = 0 ; i < 4 ; i ++){
			ret[x][x+i] = 'a'+(i/2);
			ret[x+i][x+4] = 'a'+(i/2);
			ret[x+4][x+3-i] = 'a'+(i/2);
			ret[x+3-i][x] = 'a'+(i/2);
		}
		ret[x+1][x+2] = 'c';
		ret[x+1][x+3] = 'c';
		ret[x+2][x+1] = 'd';
		ret[x+3][x+1] = 'd';
	}
	if(y == 7){
		for(int i = 0 ; i < 6 ; i ++){
			int t=0;
			if(i&2)t == 1;
			ret[x+t][x+i] = 'a'+(i/2);
			ret[x+i][x+6-t] = 'a'+(i/2);
			ret[x+6-t][x+5-i] = 'a'+(i/2);
			ret[x+5-i][x+t] = 'a'+(i/2);
		}
		ret[x+2][x+3] = 'd';
		ret[x+2][x+4] = 'd';
		ret[x+3][x+2] = 'e';
		ret[x+4][x+2] = 'e';
	}

int main(){
	int n;
	cin >> n;
	
	if(n%3 == 0){
		for(int i = 0 ; i < n/3 ; i ++){
			ret[3*i+0][3*i+0] = 'a';
			ret[3*i+1][3*i+0] = 'a';
			ret[3*i+2][3*i+1] = 'a';
			ret[3*i+2][3*i+2] = 'a';
		}
	}
	else {
		for(int i = 0 ; i < (n-4)/9 ; i ++){
			for(int j = 0 ; j < 3 ; j ++){
				for(int k = 0 ; k < 3 ; k ++){
					ret[9*i+2*j+0][9*i+k] = 'a'+(3*j+k);
					ret[9*i+2*j+1][9*i+k] = 'a'+(3*j+k);
					ret[9*i+6+j][9*i+3+2*k+0] = 'a'+(3*j+k);
					ret[9*i+6+j][9*i+3+2*k+1] = 'a'+(3*j+k);
				}
			}
		}
		int i = (n-4)/9;
		if(n%9 == 4){
			solve(i*9,4);
		}
		else if(n%9 == 5){
			solve(i*9,5);
		}
		else if(n%9 == 7){
			solve(i*9,7);
		}
		else if(n%9 == 8){
			solve(i*9,4);
			solve(i*9+4,4);
		}
		else if(n%9 == 10){
			solve(i*9,5);
			solve(i*9+5,5);
		}
		else if(n%9 == 11){
			solve(i*9,4);
			solve(i*9+4,7);
		}
	}
	for(int i = 0 ; i < n ; i ++){
		for(int j = 0 ; j < n ; j ++){
			printf("%c",ret[i][j]);
		}
		puts("");
	}
}

Compiler output:
a.cc: In function 'void solve(int, int)':
a.cc:57:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   57 | int main(){
      |         ^~
a.cc:57:9: note: remove parentheses to default-initialize a variable
   57 | int main(){
      |         ^~
      |         --
a.cc:57:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:57:11: error: a function-definition is not allowed here before '{' token
   57 | int main(){
      |           ^
a.cc:109:2: error: expected '}' at end of input
  109 | }
      |  ^
a.cc:11:24: note: to match this '{'
   11 | void solve(int x,int y){
      |                        ^
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int64_t i=0;i<(n);i++)
#define ALL(a)  (a).begin(),(a).end()
#define SORT(c) sort((c).begin(),(c).end())
#define REV(c) reverse((c).begin(),(c).end())
#define YES cout << "YES" << endl;
#define NO cout << "NO" << endl;
#define Yes cout << "Yes" << endl;
#define No cout << "No" << endl;
#define COUTDOUBLE(d,i) cout << setprecision((i)) << (d) << endl;
#define VIN(v) for(int64_t i=0;i<(v).size();i++){cin >> (v).at(i);}
#define MREP(i,m) for(auto i=(m).begin(); i != (m).end(); ++i) // auto key = i->first;auto value = i->second;

using namespace std;
typedef int64_t I;
typedef pair<I,I> P;
typedef vector<I> V;

I MOD = pow(10,9)+7;
I MAX = LONG_MAX;
I MIN = LONG_MIN;

// 最大公約数
I gcd(I a, I b) {
  return b != 0 ? gcd(b, a % b) : a;
}

// 最小公倍数
I lcm(I a, I b) {
  return a * b / gcd(a, b);
}

int ctoi(char c){
  return c - '0';
}

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  I n;
  cin >> n;
  REP(i,10){
    if (n == pow(2,i) || 1=1){
        cout << -1 << endl;
        return 0;
    }
  }
  I two = 1, base = n;
  if (n % 2 == 0){
    while (true){
      if (base % 2 == 0){
        base /= 2;
        two *= 2;
      }else{
        break;
      }
    }
  }
  if (n%3==0){
    REP(i,base*two){
      REP(j,base*two){
        if (i % base == 0 && j % base == 0){
          cout << ".";
        }else if(i % base == 0){
          if ((j%base) % 4 == 1 || (j%base) % 4 == 2){
            cout << "a";
          }else{
            cout << "b";
          }
        }else if(j%base==0){
          if ((i%base) % 4 == 1 || (i%base) % 4 == 2){
            cout << "a";
          }else{
            cout << "b";
          }
        }else{
          cout << ".";
        }
      }
      cout << endl;
    }
  }else{
    cout << -1 << endl;
  }
  return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:43:23: error: lvalue required as left operand of assignment
   43 |     if (n == pow(2,i) || 1=1){
      |         ~~~~~~~~~~~~~~^~~~
Language: C++

int main(){
    int n;
    scanf("%d", &n);
    printf("%d\n", -1);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'scanf' was not declared in this scope
    3 |     scanf("%d", &n);
      |     ^~~~~
a.cc:4:5: error: 'printf' was not declared in this scope
    4 |     printf("%d\n", -1);
      |     ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | int main(){