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

#include "bits/stdc++.h"
using namespace std;
int H,W;
string S[15];
vector<char> v[15];
map<vector<int>,int> cnt;
int main()
{
	cin>>H>>W;
	for(int i=0;i<H;i++) cin>>S[i];
	for(int i=0;i<H;i++)
	{
		for(int j=0;j<W;j++) v[i].push_back(S[i][j]);
		sort(v[i].begin(),v[i].end());
		cnt[v[i]]++;
	}
	for(auto it : cnt) if(it.second & 1)
	{
		cout<<"NO"<<endl;
		return 0;
	}
	cout<<"YES"<<endl; 
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:20: error: no match for 'operator[]' (operand types are 'std::map<std::vector<int>, int>' and 'std::vector<char>')
   15 |                 cnt[v[i]]++;
      |                    ^
In file included from /usr/include/c++/14/map:63,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:152,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_map.h:504:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const key_type&) [with _Key = std::vector<int>; _Tp = int; _Compare = std::less<std::vector<int> >; _Alloc = std::allocator<std::pair<const std::vector<int>, int> >; mapped_type = int; key_type = std::vector<int>]'
  504 |       operator[](const key_type& __k)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_map.h:504:34: note:   no known conversion for argument 1 from 'std::vector<char>' to 'const std::map<std::vector<int>, int>::key_type&' {aka 'const std::vector<int>&'}
  504 |       operator[](const key_type& __k)
      |                  ~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_map.h:524:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](key_type&&) [with _Key = std::vector<int>; _Tp = int; _Compare = std::less<std::vector<int> >; _Alloc = std::allocator<std::pair<const std::vector<int>, int> >; mapped_type = int; key_type = std::vector<int>]'
  524 |       operator[](key_type&& __k)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_map.h:524:29: note:   no known conversion for argument 1 from 'std::vector<char>' to 'std::map<std::vector<int>, int>::key_type&&' {aka 'std::vector<int>&&'}
  524 |       operator[](key_type&& __k)
      |                  ~~~~~~~~~~~^~~
Language: C++

#include <string>
#include <vector>
#include <iostream>
#include <functional>
using namespace std;
int main() {
	int H, W;
	cin >> H >> W;
	vector<string> S(H);
	for (int i = 0; i < H; ++i) cin >> S[i];
	function<bool(vector<int>)> solve = [&](vector<int> p) {
		if (p.size() == H) {
			vector<string> verti(W);
			for (int i = 0; i < W; ++i) {
				for (int j = 0; j < H; ++j) {
					verti[i] += S[p[j]][i];
				}
			}
			int cnt = 0;
			vector<bool> used(W);
			for (int i = 0; i < W; ++i) {
				if (used[i]) continue;
				string t = verti[i];
				reverse(t.begin(), t.end());
				for (int j = 0; j < W; ++j) {
					if (i != j && verti[j] == t) {
						used[i] = true;
						used[j] = true;
						cnt += 2;
						break;
					}
				}
			}
			if (W - cnt == 1) {
				for (int i = 0; i < W; ++i) {
					if (!used[i]) {
						string t = verti[i];
						reverse(t.begin(), t.end());
						if (t == verti[i]) ++cnt;
					}
				}
			}
			if (W == cnt) return true;
			return false;
		}
		int M = p.size();
		vector<bool> usedp(H);
		for (int i : p) usedp[i] = true;
		for (int i = 0; i < H; ++i) {
			if (usedp[i]) continue;
			bool ok = true;
			if (M >= 1 && M < H / 2 && p[M - 1] > i) ok = false;
			if (M > H - M - 1 && p[H - M - 1] > i) ok = false;
			if (ok) {
				p.push_back(i);
				if (solve(p)) return true;
				p.pop_back();
			}
		}
		return false;
	};
	bool ans = solve(vector<int>());
	cout << (ans ? "YES" : "NO") << endl;
	return 0;
}

Compiler output:
a.cc: In lambda function:
a.cc:24:33: error: 'reverse' was not declared in this scope
   24 |                                 reverse(t.begin(), t.end());
      |                                 ^~~~~~~
a.cc:38:49: error: 'reverse' was not declared in this scope
   38 |                                                 reverse(t.begin(), t.end());
      |                                                 ^~~~~~~
Language: C++

#include<iomanip>
#include<limits>
#include<thread>
#include<utility>
#include<iostream>
#include<string>
#include<algorithm>
#include<set>
#include<map>
#include<vector>
#include<stack>
#include<queue>
#include<cmath>
#include<numeric>
#include<cassert>
#include<random>
#include<chrono>
using namespace std;
typedef unsigned long long int ull;
typedef long long int ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pi;
typedef pair<double,double> pd;
typedef pair<double,ll> pdl;
#define F first
#define S second
#define MK make_pair
const ll E=1e17+7;
const ll MOD=1000000007;




int main(){
    ll h,w;
    cin>>h>>w;
    vector<vector<ll>> a(h);
    vector<vector<ll>> b(w);
    for(int i=0;i<h;i++){
        for(int t=0;t<w;t++){
            char c;
            cin>>c;
            a[i].push_back((ll)c);
            b[t].push_back((ll)c);
        }
    }
    for(int i=0;i<a.size();i++){sort(a[i].begin(),a[i].end());}
    for(int i=0;i<b.size();i++){sort(b[i].begin(),b[i].end());}
    sort(a.begin(),a.end());
    sort(b.begin(),b.end());
    ll ac=h%2;
    ll bc=w%2;
    for(int i=0;i<h-1;i+=2){
        if(a[i]!=a[i+1]){ac--; i--;}
    }
    for(int i=0;i<w-1;i+=2){
        if(b[i]!=b[i+1]){bc--; i--;}
    }
    assert(h%2==0 && w%2==0));
    if(ac>=0 && bc>=0){cout<<"YES"<<endl;}
    else{cout<<"NO"<<endl;}
    
    
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:59:29: error: expected ';' before ')' token
   59 |     assert(h%2==0 && w%2==0));
      |                             ^
Language: C++

//作者：中国江苏省南京市李硕睿
#include <stdio.h>
#include <iostream>
#include <string>
#include <string.h>
using namespace std;
int n,m;
string s[20];
int swaped[20];
int used[20];
int ans = 0;
bool check()
{
	memset(used,0,sizeof used);
	for(int i=0;i<m;i++){
		for(int j=0;j<m;j++){
			if(used[i]||used[j]||i==j) continue;
			int cur=1;
			for(int k=0;k<n;k++){
				if(s[swaped[k]][i]!=s[k][j]){
					cur=0;
					break;
				}
			}
			if(cur){
				used[i]=used[j]=1;
			}
		}
	}
	int cnt=0,to=0;
	for(int i=0;i<m;i++){
		if(!used[i]){
			cnt++;to=i;
		}
	}
	if(cnt>=2 || (m%2==0&&cnt)){
		return false;
	}
	if(!cnt) return true;
	for(int i=0;i<n;i++){
		if(s[swaped[i]][to]!=s[i][to]){
			return false;
		}
	}
	return true;
}
void dfs(int now,bool ji)
{
	if(now==(n+1)/2){
		if(check()){
			ans=1;
		}
		return;
	}
	for(int i=now;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(swaped[i]==-1&&swaped[j]==-1){
				swaped[i]=j;
				swaped[j]=i;
				dfs(now+1,ji);
				swaped[i]=-1;
				swaped[j]=-1;
			}
		}
		if(ji&&swaped[i]==-1){
			swaped[i]=i;
			dfs(now+1,false);
			swaped[i]=-1;
		}
	}
}
int main()
{
	scanf("%d%d",&n,&m);
	for(int i=0;i<n;i++){
		cin>>s[i];
		swaped[i]=-1;
	}
	if (n&1){
		check(n);
	}else{
		check(1);
	}
	if(n&1){
		dfs(0,true);
	}else{
		dfs(0,false);
	}
	if(ans) printf("YES\n");
	else printf("NO\n");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:80:22: error: too many arguments to function 'bool check()'
   80 |                 check(n);
      |                 ~~~~~^~~
a.cc:12:6: note: declared here
   12 | bool check()
      |      ^~~~~
a.cc:82:22: error: too many arguments to function 'bool check()'
   82 |                 check(1);
      |                 ~~~~~^~~
a.cc:12:6: note: declared here
   12 | bool check()
      |      ^~~~~
Language: C++

// g++ -std=c++11 a.cpp
#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<random>
#include<cstring>
#include<queue>
#include<stack>
#include<bitset>
#include<cstdio>
#include<sstream>
#include<iomanip>
#include<assert.h>
#include<typeinfo>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define pb push_back
#define all(in) in.begin(),in.end()
#define shosu(x) fixed<<setprecision(x)
using namespace std;
//kaewasuretyuui
typedef long long ll;
//#define int ll
typedef ll Def;
typedef pair<Def,Def> pii;
typedef vector<Def> vi;
typedef vector<vi> vvi;
typedef vector<pii> vp;
typedef vector<vp> vvp;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef pair<Def,pii> pip;
typedef vector<pip>vip;
//#define mt make_tuple
//typedef tuple<int,int,int> tp;
//typedef vector<tp> vt;
template<typename A,typename B>bool cmin(A &a,const B &b){return a>b?(a=b,true):false;}
template<typename A,typename B>bool cmax(A &a,const B &b){return a<b?(a=b,true):false;}
//template<class C>constexpr int size(const C &c){return (int)c.size();}
//template<class T,size_t N> constexpr int size(const T (&xs)[N])noexcept{return (int)N;}
const double PI=acos(-1);
const double EPS=1e-9;
Def inf = sizeof(Def) == sizeof(long long) ? 2e18 : 1e9+10;
int dx[]={0,1,0,-1};
int dy[]={1,0,-1,0};
int n,m;
bool h=false;
vs in;
vi used;
int q=0;
void f(int a){
	if(a==n/2){
		vs t(n);
		rep(i,n)t[used[i]]=in[i];
		int co=0,co1=0;
		vi use(m);
		rep(i,m)if(use[i]==0){
			loop(j,i+1,m)if(use[i]==0){
				bool H=true;
				rep(k,n)if(t[k][i]!=t[n-1-k][j])H=false;
				if(H){
					use[j]=true;
					goto end;
				}
			}
			co++;
			bool w=true;
			rep(k,n)if(t[k][i]!=t[n-1-k][i])w=false;
			if(w)co1++;
			end:;
		}
		if(m%2==co){
			if(co&&co1==0)return;
			h=true;
		}
		return;
	}
	rep(i,n)if(used[i]==q){
		loop(j,i+1,n)if(used[j]==q){
			used[i]=a;
			used[j]=n-1-a;
			f(a+1);
			used[i]=used[j]=q;
		}
	}
}
int main(){
	cin>>n>>m;
	in=vs(n);
	if(n%2)q=n/2;
	rep(i,n)cin>>in[i];
	used=vi(n,q);
	f(0);
	
	if(h)cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
}



Compiler output:
a.cc: In function 'void f(int)':
a.cc:76:25: error: jump to label 'end'
   76 |                         end:;
      |                         ^~~
a.cc:69:46: note:   from here
   69 |                                         goto end;
      |                                              ^~~
a.cc:73:30: note:   crosses initialization of 'bool w'
   73 |                         bool w=true;
      |                              ^
Language: C++

// g++ -std=c++11 a.cpp
#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<random>
#include<cstring>
#include<queue>
#include<stack>
#include<bitset>
#include<cstdio>
#include<sstream>
#include<iomanip>
#include<assert.h>
#include<typeinfo>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define pb push_back
#define all(in) in.begin(),in.end()
#define shosu(x) fixed<<setprecision(x)
using namespace std;
//kaewasuretyuui
typedef long long ll;
//#define int ll
typedef ll Def;
typedef pair<Def,Def> pii;
typedef vector<Def> vi;
typedef vector<vi> vvi;
typedef vector<pii> vp;
typedef vector<vp> vvp;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef pair<Def,pii> pip;
typedef vector<pip>vip;
//#define mt make_tuple
//typedef tuple<int,int,int> tp;
//typedef vector<tp> vt;
template<typename A,typename B>bool cmin(A &a,const B &b){return a>b?(a=b,true):false;}
template<typename A,typename B>bool cmax(A &a,const B &b){return a<b?(a=b,true):false;}
//template<class C>constexpr int size(const C &c){return (int)c.size();}
//template<class T,size_t N> constexpr int size(const T (&xs)[N])noexcept{return (int)N;}
const double PI=acos(-1);
const double EPS=1e-9;
Def inf = sizeof(Def) == sizeof(long long) ? 2e18 : 1e9+10;
int dx[]={0,1,0,-1};
int dy[]={1,0,-1,0};
int n,m;
bool h=false;
vs in;
vi used;
int q=0;
void f(int a){
	if(a==n/2){
		vs t(n);
		rep(i,n)t[used[i]]=in[i];
		int co=0,co1=0;
		vi use(m);
		rep(i,m)if(use[i]==0){
			loop(j,i+1,m)if(use[i]==0){
				bool H=true;
				rep(k,n)if(t[k][i]!=t[n-1-k][j])H=false;
				if(H){
					use[j]=true;
					goto end;
				}
			}
			co++;
			bool H=true;
			rep(k,n)if(t[k][i]!=t[n-1-k][i])H=false;
			if(H)co1++;
			end:;
		}
		if(m%2==co){
			if(co&&co1==0)return;
			h=true;
		}
		return;
	}
	rep(i,n)if(used[i]==q){
		loop(j,i+1,n)if(used[j]==q){
			used[i]=a;
			used[j]=n-1-a;
			f(a+1);
			used[i]=used[j]=q;
		}
	}
}
int main(){
	cin>>n>>m;
	in=vs(n);
	if(n%2)q=n/2;
	rep(i,n)cin>>in[i];
	used=vi(n,q);
	f(0);
	
	if(h)cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
}



Compiler output:
a.cc: In function 'void f(int)':
a.cc:76:25: error: jump to label 'end'
   76 |                         end:;
      |                         ^~~
a.cc:69:46: note:   from here
   69 |                                         goto end;
      |                                              ^~~
a.cc:73:30: note:   crosses initialization of 'bool H'
   73 |                         bool H=true;
      |                              ^
Language: C++

#include <ctime>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#define inl inline
#define reg register
#define C 18
#define P 33
#define N 12
#define S 4096
using namespace std;
bool eq[N][N],dp[S];
char s[N][N|1];
int n,m,c,p[N];
inl int rnd() {
	return (0u+(1u*c<<27)+(1u*c>>5))>>1;
}
inl void rndp() {
	for(int i=1;i<n;i++)
		swap(p[i],p[rnd()%i]);
}
int main() {
	srand(time(0));
	c=rand();
	scanf("%d%d",&n,&m);
	for(reg int i=0;i<n;i++)
		p[i]=i,scanf("%s",s[i]);
	while(C*clock()<P*10*CLOCKS_PER_SEC) {
		rndp();
		memset(eq,1,sizeof(eq));
		for(int i=0;i<m;i++)
			for(int j=i;j<m;j++)
				for(int k=0;k<n;k++)
					if(s[p[k]][i]!=s[p[n-k-1]][j])
						eq[i][j]=0;
		memset(dp,0,sizeof(dp));
		dp[0]=1;
		for(int s=0;s<(1<<m);s++)
			for(int i=0;i<m;i++)
				for(int j=i;j<m;j++)
					if(!(1<<i&s)&&!(1<<j&s)&&eq[i][j])
						dp[s|(1<<i)|(1<<j)]=1;
		bool chk=0;
		if(m&1) {
			for(int i=0;i<m;i++)
				if(dp[(1<<m)-(1<<i)-1]&&eq[i][i])
					chk=1;
		} else	chk=dp[(1<<m)-1];
		if(chk)	return puts("YES");
		c++;
	}	return!printf("%d\n",c);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:21: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   26 |         for(reg int i=0;i<n;i++)
      |                     ^
a.cc:30:17: error: 'memset' was not declared in this scope
   30 |                 memset(eq,1,sizeof(eq));
      |                 ^~~~~~
a.cc:5:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <iostream>
  +++ |+#include <cstring>
    5 | #define inl inline
Language: C++

#pragma GCC optimize(2) //O2ÓÅ»¯£¿
#include<bits/stdc++.h>
#include<windows.h>
#define mp make_pair
#define rep(i,n) for(int i=0;i<n;i++)
#define BINF 0x7fffffff
#define INF 0x3f3f3f3f
#define LINF 9223372036854775807
#define END(s) {cout<<s;exit(0);}
#define CON(s) {cout<<s;continue;}
#define BRE(s) {cout<<s;break;}
#define pb push_back
#define All(a) a.begin(),a.end()  //with A in CAPITAL!!!
#define sz(a) (int)a.size()
#define F first
#define S second
#define LOCAL_JUDGE 1 //remember to change
using namespace std;
string c[15],grid[15];
char buf[15][15];
bool used[15],vis[15];
int n,m;
char cnt[30];
inline void Copy(){
	rep(i,n){
		rep(j,m){
			buf[j][i]=grid[i][j];
		}
	} 
	rep(i,m){
		c[i]=buf[i];
	}
}
inline bool check(){
	bool one=!(m%2);
	for(int i=1;i<m;i++){
		string s=c[i];
		reverse(All(s));
		for(int j=0;j<i;j++){
			if(used[j]) continue;
			if(c[j]!=s) continue;
			used[i]=used[j]=true;
			goto L;
		}
		if(!one){
			if(s==c[i]){
				one=true;
				used[i]=true;
			}
		}
		L:;
	}
	rep(i,m){
		if(!used[i])
			return false;
	}
	return true;
}
inline void TLE(){
	Copy();
	if(check()) END("YES\n");
	for(int i=1;i<n;i++){
		for(int j=0;j<i;j++){
			if(vis[i] && vis[j]) continue;
			bool vised1=vis[i],vised2=vis[j];
			vis[i]=true;
			vis[j]=true;
			swap(grid[i],grid[j]);
			TLE();
			swap(grid[i],grid[j]);
			if(!vised1) vis[i]=false;
			if(!vised2) vis[j]=false;
		}
	}
}
int main(){
	freopen("input.txt","r",stdin);
	cin>>n>>m;
	rep(i,n){
		cin>>grid[i];
		rep(j,m){
			buf[j][i]=grid[i][j];
			cnt[grid[i][j]-'a']++;
		}
	}
	rep(i,26) if(cnt[i]%2) END("NO\n")
	rep(i,m){
		c[i]=buf[i];
	}
	TLE();
	cout<<"NO\n";
	return 0;
}

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

/**
                  ▄█▀ ▀█▀ ▄▀▄ █▀ █▄█▄█ ▄▀▄ █▀ ▄█▀
                  <⇋⇋⇋⋛∰≓⊂(⌒,_ゝ⌒)⊃≓∰⋛⇋⇋⇋>

            ♔♕♖♗♘♙ ☜❷☞✪ ィℋ६ ≈ ᗫẵℜℵĬŊĞ ✪☜❷☞ ♚♛♜♝♞♟
            ♔♕♖♗♘♙                             ♚♛♜♝♞♟
                      ˙·٠•●♥ Ƹ̵̡Ӝ̵̨̄Ʒ ♥●•٠·˙
**/

#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <time.h>
#include <map>
#include <deque>
#include <string>
#include <set>
#include <math.h>

#define sz(s) s.size()
#define pb push_back
#define fr first
#define sc second
#define mk make_pair
#define int long long
#define all(s) s.begin(), s.end()

using namespace std;

const int N = 1e6 + 5;
const int inf = 1e9 + 7;

int n, m;
char x;
map < char, int > cnt;

main()
{
   srand(time(0));
   cin >> n >> m;
   for( int i = 1; i <= n; i++ )
      for( int j = 1; j <= m; j++ )
         cin >> x, cnt[ x ] ++;
         
   for( auto x : mp )
      if( x.sc % 2 == 1 )
      {
         puts("NO");
         return 0;
      }
      
   if( rand() % 2 )
      puts("NO");
   else
      puts("YES");
}


Compiler output:
a.cc:39:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   39 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:47:18: error: 'mp' was not declared in this scope; did you mean 'm'?
   47 |    for( auto x : mp )
      |                  ^~
      |                  m
Language: C++

#include <iostream>
#include <algorithm>
#include <math.h>
#include <string.h>
#include <cstdio>
#include <vector>
#include <set>
#include <cassert>
#include <cstdlib>
#include <complex>
#include <cctype>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <sstream>
#include <functional>
#include <iomanip>
//#include <windows.h>  //Should be deleted when using AtCoder&POJ
using namespace std;

#define ll long long
#define pii pair<int,int>
/**==Info==
*Program:4
*Problem:Symmetric Grid
*Date:2018-4-21
*Algorithm:kawatea's Solution
*Stats:Unknown*/

bool debug=false;

int n,m;
string s[15];
string ss[15];
int a[15],b[15];

void cardTime(）{
	while(clock()<=1990){}
}
              
void dfs2(int pos,bool mid){
	if(pos==m){
      cardTime();
		puts("YES");
		exit(0);
	}
	if(b[pos]!=-1){
		dfs2(pos+1,mid);
		return;
	}
	for(int i=pos+1;i<m;i++){
		if(b[i]!=-1){
			continue;
		}
		int j;
		for(j=0;j<n;j++){
			if(s[j][pos]!=s[a[j]][i]) break;
		}
		
		
		if(j==n){
			b[pos]=i;
			b[i]=pos;
			dfs2(pos+1,mid);
			b[pos]=-1;
			b[i]=-1;
		}
	}
	
	if(!mid){
		int j;
		for(j=0;j<n;j++){
			if(s[j][pos]!=s[a[j]][pos]) break;
		}
		
		if(j==n){
			b[pos]=pos;
			dfs2(pos+1,true);
			b[pos]=-1;
		}
	}
}

void dfs(int pos,bool mid){
	if(pos==n){
		dfs2(0,!m%2);
		return;
	}
	if(a[pos]!=-1){
		dfs(pos+1,mid);
		return;
	}
	for(int i=pos+1;i<n;i++){
		if(a[i]!=-1){
			continue;
		}
		if(ss[i]!=ss[pos]){
			continue;
		}
		
		a[i]=pos;
		a[pos]=i;
		
		dfs(pos+1,mid);
		
		a[pos]=-1;
		a[i]=-1;
	}
	
	if(!mid){
		a[pos]=pos;
		dfs(pos+1,true);
		a[pos]=-1;
	}
}

int main(int argc,char* argv[]){
	scanf("%d%d",&n,&m);
	for(int i=0;i<n;i++){
		cin>>s[i];
		ss[i]=s[i];
		sort(ss[i].begin(),ss[i].end());
	}
	
	memset(a,-1,sizeof(a));
	memset(b,-1,sizeof(b));
	
	dfs(0,!n%2);
	
  	cardTime();
	puts("NO");
	
	//Atcoder is just a fuck
	return 0;
}



Compiler output:
a.cc:41:6: error: variable or field 'cardTime' declared void
   41 | void cardTime(）{
      |      ^~~~~~~~
a.cc:41:15: error: '\U0000ff09' was not declared in this scope
   41 | void cardTime(）{
      |               ^~
Language: C++

#include <cstdio>
#include <string>
#include <cstring>
#include <cstdlib>
#define mxn 12
#define mxm 26
using namespace std;
char s[mxn][mxn];
int n,m,p[mxn],a[mxn];
string t[mxn|1];
bool mirror(int l,int r) {
	for(int i=0;i<n;i++)
		if(s[i][l]!=s[p[i]][r])
			return 0;
	return 1;
}
void dfscol(int d,bool b) {
	if(d==m) {	puts("YES");	exit(0);	}
	if(~a[d]) {	dfscol(d+1,b);	return;	}
	for(int i=d+1;i<m;i++)
		if(a[i]==-1&&mirror(d,i)) {
			a[d]=i,a[i]=d;
			dfscol(d+1,b);
			a[d]=-1,a[i]=-1;
		}
	if(b&&mirror(d,d))	a[d]=d,dfscol(d+1,0),a[d]=0;
}
void dfsrow(int d,bool b) {
	if(d==n) {	dfscol(0,m&1);	return;	}
	if(~p[d]) {	dfsrow(d+1,b);	return;	}
	for(int i=d+1;i<n;i++)
		if(p[i]==-1&&t[d]==t[i]) {
			p[d]=i,p[i]=d;
			dfsrow(d+1,b);
			p[d]=-1,p[i]=-1;
		}
	if(b)	p[d]=d,dfsrow(d+1,0),p[d]=0;
}
int main() {
	memset(p,-1,sizeof(p));
	memset(a,-1,sizeof(a));
	scanf("%d%d",&n,&m);
	for(int i=0;i<n;i++) {
		scanf("%s",s[i]);
		for(int j=0;j<m;j++)
			t[i]+=s[i][j];
		sort(t[i].begin(),t[i].end());
	}
	dfsrow(0,n&1);
	puts("NO");
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:47:17: error: 'sort' was not declared in this scope; did you mean 'short'?
   47 |                 sort(t[i].begin(),t[i].end());
      |                 ^~~~
      |                 short
Language: C++

for(int i=2;i<=h;i++){
        for(int j=0;j<w;j++) v[j]=0;
        if(w%2) t=-1;
        else t=0;
        l.clear(); r.clear();
        int pos=1;
        for(int j=0;j<w;j++){
            if(v[j]) continue;
            v[j]=1; int f=0;
            for(int k=j+1;k<w;k++){
                if(!v[k] && s[1][j]==s[i][k] && s[1][k]==s[i][j]){
                    v[k]=1;
                    f=1;
                    l.pb(j);
                    r.pb(k);
                    break;
                }
            }
            if(!f){
                if(t==-1) t=j;
                else{
                    pos=0;
                    break;
                }
            }
        }
        if(!pos) continue;

        sort(l.begin(),l.end());
        sort(r.begin(),r.end());
        do{

            for(int i=1;i<=h;i++) q[i]="";
            for(int i : l){
                for(int j=1;j<=h;j++){
                    q[j]+=s[j][i];
                }
            }
            if(w%2){
                for(int j=1;j<=h;j++){
                    q[j]+=s[j][t];
                }
            }
            for(int i : r){
                for(int j=1;j<=h;j++){
                    q[j]+=s[j][i];
                }
            }
            for(int i=1;i<=h;i++) vv[i]=0;
            int tt=0;
            if(h%2) tt=1;
            int good=1;
            for(int i=1;i<=h;i++){
                if(vv[i]) continue;
                vv[i]=1;
                int ff=0;
                for(int j=i+1;j<=h;j++){
                    if(!vv[j] && f(i,j)){
                        vv[j]=1;
                        ff=1;
                        break;
                    }
                }
                if(!ff){
                    if(tt) tt=0;
                    else{
                        good=0;
                        break;
                    }
                }
            }
            if(good){
                cout << "YES";
                return 0;
            }

        }while(next_permutation(r.begin(),r.end()));
    }

Compiler output:
a.cc:1:1: error: expected unqualified-id before 'for'
    1 | for(int i=2;i<=h;i++){
      | ^~~
a.cc:1:13: error: 'i' does not name a type
    1 | for(int i=2;i<=h;i++){
      |             ^
a.cc:1:18: error: 'i' does not name a type
    1 | for(int i=2;i<=h;i++){
      |                  ^
Language: C++

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

int H, W; string S[15], T[15]; bool flag = false;

bool check() {
	vector<string>I;
	for (int i = 0; i < W; i++) {
		string U = "";
		for (int j = 0; j < H; j++) U += T[j][i];
		I.push_back(U);
	}
	set<string>G;
	for (int i = 0; i < I.size(); i++) {
		string V = I[i]; reverse(V.begin(), V.end());
		
		if (G.find(V) != G.end()) G.erase(V);
		else G.insert(I[i]);
	}
	if (G.size() <= 1) return true;
	return false;
}

void dfs(vector<pair<int, int>>vec) {
	if (vec.size() == H / 2) {
		bool u[16]; for (int i = 0; i < 16; i++) u[i] = false;
		for (int i = 0; i < vec.size(); i++) {
			T[i] = S[vec[i].first]; u[vec[i].first] = true;
			T[H - 1 - i] = S[vec[i].second]; u[vec[i].second] = true;
		}
		for (int i = 0; i < H; i++) {
			if (u[i] == false) T[H / 2] = S[i];
		}
		if (check() == true) flag = true;
		return;
	}
	bool used[14];
	for (int i = 0; i < 14; i++) used[i] = false;
	for (int i = 0; i < vec.size(); i++) {
		used[vec[i].first] = true;
		used[vec[i].second] = true;
	}
	int s = -1;
	for (int i = 0; i < H; i++) {
		if (used[i] == false) { s = i; break; }
	}
	for (int i = 0; i < H; i++) {
		if (used[i] == true || i == s) continue;
		vector<pair<int, int>>D = vec; D.push_back(make_pair(s, i));
		dfs(D);
	}
}

int main() {
	cin >> H >> W;
	for (int i = 0; i < H; i++) cin >> S[i];
	dfs(vector<pair<int, int>>{});

	if (flag == true) cout << "YES" << endl;
	else cout << "NO" << endl;
	return 0;
}

Compiler output:
a.cc: In function 'bool check()':
a.cc:18:34: error: 'reverse' was not declared in this scope
   18 |                 string V = I[i]; reverse(V.begin(), V.end());
      |                                  ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
const int N = 20;

string str[N]; int h, w, a[N][N], b[N][N]; bool b;

struct tData {
	int sum[30];  // 1 ~ 26
	
	tData() { memset( sum, 0, sizeof( sum ) ); }
	
	bool operator == ( const tData &rhs ) const {
		for( int i = 1; i <= 26; i ++ )	 
			if( sum[i] != rhs.sum[i] ) return false;
		return true;
	}
} row[N], column[N];

bool visited_row[N], visited_column[N];

int mp_row[N], mp_column[N];

bool check()
{
	for( int i = 1; i <= h; i ++ )
		for( int j = 1; j <= w; j ++ )
			b[i][j] = a[mp_row[i]][mp_column[j]];
			
	for( int i = 1; i <= h; i ++ )
		for( int j = 1; j <= w; j ++ )
			if( b[i][j] != b[h+1-i][w+1-j] ) 
				return false;
	return true;
}
 
bool dfs_column( int u )
{
//	printf( "column:u:%d\n", u );
	if( u > w ) return check();
	
	for( int i = 1; i <= w; i ++ )
	{
		if( visited_column[i] ) continue;
		
		if( u > ( ( w + 1 ) >> 1 ) ) 
			if( !( column[mp_column[w+1-u]] == column[i] ) )
				continue;
		
//		printf( "u:%d, i:%d\n", u, i );
		visited_column[i] = true;
		mp_column[u] = i;
		
		b = dfs_column( u+1 ); 
		visited_column[i] = false; 
		if( b ) return b; 
	}
	return false;
}
 
bool dfs_row( int u )
{
//	printf( "u:%d\n", u );/
	if( u > h ) return dfs_column( 1 );
	
	for( int i = 1; i <= h; i ++ )
	{
		if( visited_row[i] ) continue;
		
		if( u > ( h >> 1 ) ) 
			if( !( row[mp_row[h+1-u]] == row[i] ) )
				continue;
			
		visited_row[i] = true;
		mp_row[u] = i;
		
		b = dfs_row( u+1 ) 
		visited_row[i] = false; 
		if( b ) return b;
	}
	return false;
}
 
int main()
{
	scanf( "%d%d", &h, &w );
	for( int i = 1; i <= h; i ++ )	
		cin>> str[i];
		
	for( int i = 1; i <= h; i ++ )
		for( int j = 1; j <= w; j ++ )
			a[i][j] = str[i][j-1] - 'a' + 1; 
			
	for( int i = 1; i <= h; i ++ )
		for( int j = 1; j <= w; j ++ )
			row[i].sum[a[i][j]] ++, column[j].sum[a[i][j]] ++;
			
//	printf( "%d\n", column[1] == column[2] );

	if( dfs_row( 1 ) )
		printf( "YES\n" );
	else printf( "NO\n" ); 
	
	return 0;
}

Compiler output:
a.cc:5:49: error: conflicting declaration 'bool b'
    5 | string str[N]; int h, w, a[N][N], b[N][N]; bool b;
      |                                                 ^
a.cc:5:35: note: previous declaration as 'int b [20][20]'
    5 | string str[N]; int h, w, a[N][N], b[N][N]; bool b;
      |                                   ^
a.cc: In function 'bool dfs_column(int)':
a.cc:53:19: error: incompatible types in assignment of 'bool' to 'int [20][20]'
   53 |                 b = dfs_column( u+1 );
      |                 ~~^~~~~~~~~~~~~~~~~~~
a.cc: In function 'bool dfs_row(int)':
a.cc:76:19: error: incompatible types in assignment of 'bool' to 'int [20][20]'
   76 |                 b = dfs_row( u+1 )
      |                 ~~^~~~~~~~~~~~~~~~
Language: C++

// This amazing code is by Eric Sunli Chen.
#include <algorithm>
#include <bitset>
#include <cmath>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <utility>
#include <vector>
using namespace std;
template<typename T> bool get_int(T &x)
{
	char t=getchar();
	bool neg=false;
	x=0;
	for(; (t>'9'||t<'0')&&t!='-'&&t!=EOF; t=getchar());
	if(t=='-')neg=true,t=getchar();if(t==EOF)return false;
	for(; t<='9'&&t>='0'; t=getchar())x=x*10+t-'0';
	if(neg)x=-x;return true;
}
template<typename T> void print_int(T x)
{
	if(x<0)putchar('-'),x=-x;
	short a[20]= {},sz=0;
	while(x>0)a[sz++]=x%10,x/=10;
	if(sz==0)putchar('0');
	for(int i=sz-1; i>=0; i--)putchar('0'+a[i]);
}
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define get1(a) get_int(a)
#define get2(a,b) (get1(a)&&get1(b))
#define get3(a,b,c) (get1(a)&&get2(b,c))
#define printendl(a) print_int(a),puts("")
typedef long long LL;
typedef unsigned long long uLL;
typedef pair<int,int> pii;
const int inf=0x3f3f3f3f;
const LL Linf=1ll<<61;
const double pi=acos(-1.0);

const uLL base=26;
uLL power[23];

int n,m,ord[23],pos[23];
char s[23][23];

uLL hsx[23],hsy[23];
bool use[23];
void dfs(int x)
{
	if(x==n+1)
	{
		for(int i=1;i<=m;i++)hsx[i]=hsy[i]=use[i]=0;
		for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)
		{
			hsx[j]+=power[pos[i]]*(s[i][j]-'a')
			hsy[j]+=power[n-pos[i]+1]*(s[i][j]-'a');
		}
		int match=0;
		for(int i=1;i<=m;i++)if(!use[i])
		{
			for(int j=1;j<=m;j++)if(!use[j]&&i!=j&&hsx[i]==hsy[j])
			{
				use[i]=use[j]=1;
				match++;
			}
		}
		if(match!=m/2)return;
		if(m%2==1)
		{
			for(int i=1;i<=m;i++)if(!use[i]&&hsx[i]!=hsy[i])
				return;
		}
		puts("YES");
		exit(0);
	}
	for(int i=1;i<=n;i++)if(!pos[i])
	{
		pos[i]=ord[x];
		dfs(x+1);
		pos[i]=0;
		if(n-x&1)break;
	}
	
}
int main()
{
	power[0]=1;
	for(int i=1;i<23;i++)power[i]=power[i-1]*base;
	
	get2(n,m);
	for(int i=1;i<=n;i++)scanf("%s",s[i]+1);
	int tn=0;
	if(n%2)ord[++tn]=n/2+1;
	for(int i=1;i<=n/2;i++)
	{
		ord[++tn]=i;
		ord[++tn]=n-i+1;
	}
	dfs(1);
	puts("NO");
	return 0;
}

Compiler output:
a.cc: In function 'void dfs(int)':
a.cc:66:60: error: expected ';' before 'hsy'
   66 |                         hsx[j]+=power[pos[i]]*(s[i][j]-'a')
      |                                                            ^
      |                                                            ;
   67 |                         hsy[j]+=power[n-pos[i]+1]*(s[i][j]-'a');
      |                         ~~~
Language: C++

#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<P,int> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[4]={-1,0,1,0},dy[4]={0,-1,0,1};

int h,w;
vs a;

int main(){
	cin>>h>>w;
	a=vs(h);
	for(int i=0;i<h;i++) cin>>a[i];
	vi b(h);
	for(int i=0;i<h;i++) b[i]=i/2;
	do{
		int tmp=0;
		bool B=1;
		for(int i=0;i<h;i++){
			if(tmp==b[i]) tmp++;
			else if(tmp<b[i]&&b[i]<n/2) B=0;
		}
		if(!B) continue;
		vi c(h);
		vs A(h);
		for(int i=0;i<h;i++){
			if(c[b[i]]) A[h-b[i]-1]=a[i];
			else c[b[i]]=1,A[b[i]]=a[i];
		}
		c=vi(w);
		for(int i=0;i<w;i++) if(!c[i]){
			string s;
			for(int j=0;j<h;j++) s+=A[j][i];
			for(int j=i+1;j<w;j++) if(!c[j]){
				string t;
				for(int k=0;k<h;k++) t+=A[k][j];
				reverse(t.begin(),t.end());
				if(s==t){
					c[i]=1;c[j]=1;
					break;
				}
			}
			if(!c[i]&&w%2==1&&B){
				string s_=s;
				reverse(s.begin(),s.end());
				if(s==s_) c[i]=1,B=0;
			}
		}
		B=1;
		for(int i=0;i<w;i++) if(!c[i]) B=0;
		if(B){
			cout<<"YES"<<endl;
			return 0;
		}
	}while(next_permutation(b.begin(),b.end()));
	cout<<"NO"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:48: error: 'n' was not declared in this scope
   42 |                         else if(tmp<b[i]&&b[i]<n/2) B=0;
      |                                                ^
Language: C++

#include <stdio.h>
int f(a){
    if(a==0||a==1||a==-1){return 1;}
    else{return a*f(a-2);}
}
int main(void){
int h,w,x,y,z,i,j,k,l,p,q,r,n,m;
n=0;
scanf("%d%d",&h,&w);
char a[h][w];
for(i=0;i<h;i++){
    scanf("%s",a[i]);
}
int b[w],c[h],d[w];
if(w%2==0)m=w-1;
if(w%2==1)m=w;
for(i=0;i<f(m);i++){
    x=i;
    for(j=0;j<w;j++){b[j]=-1;}
    for(j=0;j<(w+1)/2;j++){
        y=x/f(m-(j+1)*2);
        z=x%f(m-(j+1)*2);
        x=z;k=0;
        if(j==0&&w%2==1){b[y]=(w-1)/2;}else{
        while(b[k]!=-1){k++;}
        b[k]=j;p=0;
        while (p!=y+1){
            k++;
            if(b[k]==-1)p++;
        }
        b[k]=w-1-j;}
    }
    for(j=0;j<w;j++){
        d[b[j]]=j;
    }
   for(j=0;j<w;j++){
       b[j]=d[j];
   }
    for(j=0;j<h;j++){c[j]=0;}
    k=0;
    for(k=0;k<h;k++){
    if(c[k]==0){
    for(l=k+1;l<h;l++){
        if(c[l]==0){
            q=0;
            for(p=0;p<w;p++){
                if(a[k][b[p]]==a[l][b[w-1-p]])q++;
            }
            if(q==w){c[k]=1;c[l]=1;l=h;}
        }
    }}}q=0;
    for(j=0;j<h;j++){
      q+=c[j];  
    }
    if(q==h-1){
        k=0;r=0;
        while(c[k]!=0){k++;}
        for(p=0;p<w;p++){
            if(a[k][b[p]]==a[k][b[w-1-p]])r++;
        }
        if(r==w)c[k]=1;
    }q=0;
    for(j=0;j<h;j++){
        q+=c[j];
    }
    if(q==h)n++;
}
if(n>0)printf("YES\n");
if(n==0)printf("NO\n");
}

Compiler output:
a.cc:2:7: error: 'a' was not declared in this scope
    2 | int f(a){
      |       ^
a.cc: In function 'int main()':
a.cc:17:12: error: 'f' cannot be used as a function
   17 | for(i=0;i<f(m);i++){
      |           ~^~~
a.cc:21:14: error: 'f' cannot be used as a function
   21 |         y=x/f(m-(j+1)*2);
      |             ~^~~~~~~~~~~
a.cc:22:14: error: 'f' cannot be used as a function
   22 |         z=x%f(m-(j+1)*2);
      |             ~^~~~~~~~~~~
Language: C++

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

int main(){
  	int h,w;
  	cin>>h>>w;
	vector<string> s1(h),s2(w),c1,c2;
  	char c;
  	for(int i=0;i<h;i++){
      	for(int j=0;j<w;j++){
          	cin>>c;
          	s1[i]+=c;
          	s2[j]+=c;
    	}
    }
  	for(auto &t:s1)sort(t.begin(),t.end());
  	for(auto &t:s2)sort(t.begin(),t.end());
  	sort(s1.begin(),s1.end());
  	sort(s2.begin(),s2.end());
  	for(auto t:s1){
    	if(count(s1.begin(), s1.end(),t)%2==1) c1.push_back(t);
    }
  	for(auto t:s2){
    	if(count(s2.begin(), s2.end(),t)%2==1) c2.push_back(t);
    }
  	if(h%2==0 and c1.size()!=0) {cout<<"NO"<<endl; return 0;}
  	if(w%2==0 and c2.size()!=0) {cout<<"NO"<<endl; return 0;}
  	if(h%2==1 and c1.size()>1) {cout<<"NO"<<endl; return 0;}
  	if(w%2==1 and c2.size()>1) {cout<<"NO"<<endl; return 0;}
  	if(h%2==1 and ) s1.erase(find(s1.begin(), s1.end(),c1[0]));
  	if(w%2==1) s2.erase(find(s2.begin(), s2.end(),c2[0]));
    for(int i=0;i<h/2;i++){
      if(s1[i*2]!=s1[i*2+1]){cout<<"NO"<<endl; return 0;}
    }
    for(int i=0;i<w/2;i++){
      if(s2[i*2]!=s2[i*2+1]){cout<<"NO"<<endl; return 0;}
    }
	cout<<"YES"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:23: error: expected primary-expression before ')' token
   30 |         if(h%2==1 and ) s1.erase(find(s1.begin(), s1.end(),c1[0]));
      |                       ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using P = pair<int, int>;

int H, W;

bool judge(vector<P>& v, vector<string>& s) {
    vector<string> s2(H);
    for (int i = 0; i < (H + 1) / 2; i++) {
        s2[i] = s[v[i].first];
        s2[H - 1 - i] = s[v[i].second];
    }

    vector<int> used(W, false);
    int ok = W % 2;
    for (int i = 0; i < W; i++) {
        if (used[i]) continue;
        for (int j = W - 1; j >= i; j--) {
            if (used[j]) continue;
            bool flag = true;
            for (int k = 0; k < H; k++) {
                if (s2[k][i] != s2[H - 1 - k][j]) {
                    flag = false;
                    break;
                }
            }
            if (flag) {
                if (j == i) {
                    if (!ok) return false;
                    ok = false;
                }
                used[i] = true;
                used[j] = true;
                break;
            }
        }
        if (!used[i]) {
            return false;
        }
    } 
    return true;
}

bool solve(int used, vector<P>& v, vector<string>& s) {
    vector<int> idxs;
    for (int i = 0; i < H; i++) {
        if (used & (1 << i)) continue;
        idxs.push_back(i);
    }

    int m = idxs.size();
    if (m == 0) {
        return judge(v, s);
    } else if (m == 1) {
        used ^= (1 << idxs[0]);
        v.emplace_back(idxs[0], idxs[0]);
        if (solve(used, v, s)) return true;
        used ^= (1 << idxs[0]);
    } else {
        for (int ii = 0; ii < 1; ii++) {
            int i = idxs[ii];
            used ^= (1 << i);
            for (int jj = ii + 1; jj < m; jj++) {
                int j = idxs[jj];
                used ^= (1 << j);
                v.emplace_back(i, j);
                if (solve(used, v, s)) return true;
                used ^= (1 << j);
                v.pop_back();
            }
            used ^= (1 << i);
        }
    }
    return false;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> H >> W;
    vector<string> s(H);

    //vector<int> cnt(26, 0);
    for (int i = 0; i < H; i++) {
        cin >> s[i];
        /*
        for (int j = 0; j < W; j++) {
            cnt[s[i][j] - 'a']++;
        }*/
    }

    /*
    int hoge = 0;
    for (int i = 0; i < 26; i++) {
        hoge += cnt[i] % 2;
    }
    if (hoge != (H * W) % 2) {
        cout << "NO" << endl;
        return 0;
    }*/
    
    vector<P> v;
    cout << (solve(0, v, s) ? "YES" : "NO") << endl;
    cout << counter << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:107:13: error: 'counter' was not declared in this scope
  107 |     cout << counter << endl;
      |             ^~~~~~~
Language: C++

#include <bits/stdc++.h>
#define ll long long
#define pll pair<ll,ll>
#define pil pair<int,ll>
#define pli pair<ll,int>
#define pii pair<int,int>
#define ull unsigned long long
#define mk make_pair
#define pb push_back
#define eps 1e-12
#define MAXN 20
using namespace std;
string s[MAXN];
int h,w;
vector<pii> fans;
bool ans=false;
inline bool check()
{
	multiset<string> my_set;
	if(fans[0].first==fans[0].second)
	{
		int val=fans[0].first;
		fans.erase(fans.begin());
		fans.pb(mk(val,val));
	}
	for(int i=0;i<h;i++)
	{
		string temp;
		for(int j=0;j<fans.size();j++)
		{
			temp.insert(temp.end(),s[i][fans[j].first]);
		}
		for(int j=fans.size()-1;j>=0;j--)
		{
			if(fans[j].first!=fans[j].second)
			{
				temp.insert(temp.end(),s[i][fans[j].second]);
			}
		}
		int sz=temp.size();
		assert(sz==w);
		if(!my_set.empty())
		{
			string rev_temp=temp;
			reverse(rev_temp.begin(),rev_temp.end());
			auto it=my_set.find(rev_temp);
			if(it!=my_set.end())
			{
				my_set.erase(it);
			}
			else
			{
				my_set.insert(temp);
			}
		}
		else
		{
			my_set.insert(temp);
		}
	}
	if(fans.back().first==fans.back().second())
	{
		int val=fans.back().first;
		fans.pop_back();
		fans.insert(fans.begin(),mk(val,val));
	}
	if(h%2)
	{
		int sz=my_set.size();
		if(sz==1)
		{
			string temp=(*my_set.begin());
			string rev_temp=temp;
			reverse(rev_temp.begin(),rev_temp.end());
			if(temp==rev_temp)
			{
				return true;
			}
		}
		return false;
	}
	else
	{
		if(my_set.empty())
		{
			return true;
		}
		return false;
	}
}
void recurse(vector<int> v)
{
	if(v.empty())
	{
		if(check())
		{
			ans=true;
		}
		return;
	}
	int first_num=v[0];
	v.erase(v.begin());
	for(int i=0;i<v.size();i++)
	{
		vector<int> temp=v;
		int second_num=v[i];
		temp.erase(temp.begin()+i);
		fans.pb(mk(first_num,second_num));
		recurse(temp);
		fans.pop_back();
	}
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>h>>w;
	for(int i=0;i<h;i++)
	{
		cin>>s[i];
	}
	vector<int> v;
	for(int i=0;i<w;i++)
	{
		v.pb(i);
	}
	if(w%2)
	{
		for(int i=0;i<w;i++)
		{
			vector<int> temp=v;
			fans.pb(mk(i,i));
			temp.erase(temp.begin()+i);
			recurse(temp);
			fans.pop_back();
		}
	}
	else
	{
		recurse(v);
	}
	if(ans)
	{
		cout<<"YES"<<endl;
	}
	else
	{
		cout<<"NO"<<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'bool check()':
a.cc:61:49: error: expression cannot be used as a function
   61 |         if(fans.back().first==fans.back().second())
      |                               ~~~~~~~~~~~~~~~~~~^~
Language: C++

#include <bits/stdc++.h>
#define ll long long
#define pll pair<ll,ll>
#define pil pair<int,ll>
#define pli pair<ll,int>
#define pii pair<int,int>
#define ull unsigned long long
#define mk make_pair
#define pb push_back
#define eps 1e-12
#define MAXN 20
using namespace std;
string s[MAXN];
int h,w;
vector<pii> fans;
bool ans=false;
inline bool check()
{
	multiset<string> my_set;
	if(fans[0].first==fans[0].second)
	{
		int val=fans[0].first;
		fans.erase(fans.begin());
		fans.pb(mk(val,val));
	}
	for(int i=0;i<h;i++)
	{
		string temp;
		for(int j=0;j<fans.size();j++)
		{
			temp.insert(temp.end(),s[i][fans[j].first]);
		}
		for(int j=fans.size()-1;j>=0;j--)
		{
			if(fans[j].first!=fans[j].second)
			{
				temp.insert(temp.end(),s[i][fans[j].second]);
			}
		}
		int sz=temp.size();
		assert(sz==w);
		if(!my_set.empty())
		{
			string rev_temp=temp;
			reverse(rev_temp.begin(),rev_temp.end());
			auto it=my_set.find(rev_temp);
			if(it!=my_set.end())
			{
				my_set.erase(it);
			}
			else
			{
				my_set.insert(temp);
			}
		}
		else
		{
			my_set.insert(temp);
		}
	}
	if(fans.back().first==fans.back.second())
	{
		int val=fans.back().first;
		fans.pop_back();
		fans.insert(fans.begin(),mk(val,val));
	}
	if(h%2)
	{
		int sz=my_set.size();
		if(sz==1)
		{
			string temp=(*my_set.begin());
			string rev_temp=temp;
			reverse(rev_temp.begin(),rev_temp.end());
			if(temp==rev_temp)
			{
				return true;
			}
		}
		return false;
	}
	else
	{
		if(my_set.empty())
		{
			return true;
		}
		return false;
	}
}
void recurse(vector<int> v)
{
	if(v.empty())
	{
		if(check())
		{
			ans=true;
		}
		return;
	}
	int first_num=v[0];
	v.erase(v.begin());
	for(int i=0;i<v.size();i++)
	{
		vector<int> temp=v;
		int second_num=v[i];
		temp.erase(temp.begin()+i);
		fans.pb(mk(first_num,second_num));
		recurse(temp);
		fans.pop_back();
	}
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>h>>w;
	for(int i=0;i<h;i++)
	{
		cin>>s[i];
	}
	vector<int> v;
	for(int i=0;i<w;i++)
	{
		v.pb(i);
	}
	if(w%2)
	{
		for(int i=0;i<w;i++)
		{
			vector<int> temp=v;
			fans.pb(mk(i,i));
			temp.erase(temp.begin()+i);
			recurse(temp);
			fans.pop_back();
		}
	}
	else
	{
		recurse(v);
	}
	if(ans)
	{
		cout<<"YES"<<endl;
	}
	else
	{
		cout<<"NO"<<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'bool check()':
a.cc:61:36: error: invalid use of member function 'std::vector<std::pair<int, int> >::back' (did you forget the '()' ?)
   61 |         if(fans.back().first==fans.back.second())
      |                               ~~~~~^~~~
a.cc:61:41: error: expected ')' before 'second'
   61 |         if(fans.back().first==fans.back.second())
      |           ~                             ^~~~~~
      |                                         )
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
using namespace std;
int n,m;
string s[20];
int swaped[20];
int ans = 0;
bool check()
{
	int used[20];
	memset(used,0,sizeof used);
	for(int i=0;i<m;i++){
		for(int j=0;j<m;j++){
			if(used[i]||used[j]) continue;
			int cur=1;
			for(int k=0;k<n;k++){
				if(s[swaped[k]][i]!=s[k][j]){
					cur=0;
					break;
				}
			}
			if(cur){
				used[i]=used[j]=1;
			}
		}
	}
	int cnt=0,to=0;
	for(int i=0;i<m;i++){
		if(!used[i]){
			cnt++;to=i;
		}
	}
	if(cnt>=2||(m%2==0&&cnt)){
		return false;
	}
	if(!cnt) return true;
	for(int i=0;i<n;i++){
		if(s[swaped[i]][to]!=s[i][to]){
			return false;
		}
	}
	return true;
}


void dfs(int now,bool ji)
{
	if(now==(n+1)/2){
		if(check()){
			ans=1;
		}
		return;
	}
	for(int i=now;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(swaped[i]==-1&&swaped[j]==-1){
				swaped[i]=j;
				swaped[j]=i;
				dfs(now+1,ji);
				swaped[i]=-1;
				swaped[j]=-1;
			}
		}
		if(ji){
			swaped[i]=i;
			dfs(now+1,false);
			swaped[i]=-1;
		}
	}

}

int main()
{
	scanf("%d%d",&n,&m);
	for(int i=0;i<n;i++){
		cin>>s[i];
		swaped[i]=-1;
	}
	if(n&1){
		dfs(0,true);
	}else{
		dfs(0,false);
	}
	if(ans) printf("YES\n");
	else printf("NO\n");
}


Compiler output:
a.cc: In function 'bool check()':
a.cc:12:9: error: 'memset' was not declared in this scope
   12 |         memset(used,0,sizeof used);
      |         ^~~~~~
a.cc:3:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <iostream>
  +++ |+#include <cstring>
    3 | #include <string>
Language: C++

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

string str[15], str2[15];

int main() {
	
	int H, W;
	cin >> H >> W;
	
	if(H % 2 == 1 || W % 2 == 1){
		return 0;
	}
	
	for(int i = 0; i < H; i++){
		cin >> str[i];
	}
	string ss = "";
	for(int j = 0; j < H; j++){
		ss = ss + " ";
	}
	for(int i = 0; i < W; i++){
		str2[i] = ss;
	}
	for(int i = 0; i < W; i++){
		for(int j = 0; j < H; j++){
			str2[i][j] = str[j][i];
		}
	}
	
	for(int i = 0; i < H; i++){
		int a[15];
		for(int j = 0; j < W; j++){
			a[j] = str[i][j] - 'a';
		}
		sort(a, a + W);
		for(int j = 0; j < W; j++){
			str[i][j]  = a[j] + 'a';
		}
	}
	
	for(int i = 0; i < W; i++){
		int a[15];
		for(int j = 0; j < H; j++){
			a[j] = str2[i][j] - 'a';
		}
		sort(a, a + H);
		for(int j = 0; j < H; j++){
			str2[i][j]  = a[j] + 'a';
		}
	}
	
	sort(str, str + H);
	sort(str2, str2 + W);
	bool flag = true;
	for(int i = 0; i < H; i += 2){
		if(str[i] != str[i + 1]){
			flag = false;
		}
	}
	for(int i = 0; i < W; i += 2){
		if(str2[i] != str2[i + 1]){
			flag = false;
		}
	}
	
	long long int num;
	while(1){
		num++
		if(num == 500000000){
			break;
		}
	}
	
	if(flag){
		cout << "YES" << endl;
	}else{
		cout << "NO" << endl;
	}
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:72:22: error: expected ';' before 'if'
   72 |                 num++
      |                      ^
      |                      ;
   73 |                 if(num == 500000000){
      |                 ~~
Language: C++

#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;

#define int long long
typedef pair<int, int> P;

int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};

/*
#define cin ifs
#define cout ofs
ifstream ifs("in.txt");
ofstream ofs("out.txt");
//*/

signed main() {
    cin >> H >> W;
    for (int i = 0; i < H; i++) {
        cin >> S[i];
    }
    cout << "NO" << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:12: error: 'H' was not declared in this scope
   19 |     cin >> H >> W;
      |            ^
a.cc:19:17: error: 'W' was not declared in this scope
   19 |     cin >> H >> W;
      |                 ^
a.cc:21:16: error: 'S' was not declared in this scope
   21 |         cin >> S[i];
      |                ^
Language: Java


        ai.sort(Comparator.naturalOrder());
        for (int i = 0; i < H; i++) {
            if (ai.get(i).equals(ai.get(i + 1))) {
                i++;
                continue;
            }
            if (i % 2 != 0) {
                System.out.println("NO");
                return;
            }
        }

Compiler output:
Main.java:2: error: class, interface, enum, or record expected
        ai.sort(Comparator.naturalOrder());
        ^
Main.java:3: error: class, interface, enum, or record expected
        for (int i = 0; i < H; i++) {
        ^
Main.java:3: error: class, interface, enum, or record expected
        for (int i = 0; i < H; i++) {
                        ^
Main.java:3: error: class, interface, enum, or record expected
        for (int i = 0; i < H; i++) {
                               ^
Main.java:6: error: class, interface, enum, or record expected
                continue;
                ^
Main.java:7: error: class, interface, enum, or record expected
            }
            ^
Main.java:10: error: class, interface, enum, or record expected
                return;
                ^
Main.java:11: error: class, interface, enum, or record expected
            }
            ^
8 errors