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

#include <iostream>
using namespace std;
typedef long long ll;
ll MOD = 1000000007LL;
int C[200005];
int D[200005];
int prev[200005];
ll dp[200005];
int main() {
  ios::sync_with_stdio(false);
  int N, d;
  cin >> N;
  for (int i=1; i<=N; i++) {
    cin >> C[i];
  }
  for (int i=1; i<=N; i++) {
    if (C[i] == C[i-1]) continue;
    if (prev[C[i]] > 0) {
      D[prev[C[i]]] = i;
    }
    prev[C[i]] = i;
  }
  dp[1] = 1;
  for (int i=1; i<N; i++) {
    dp[i+1] += dp[i];
    dp[i+1] %= MOD;
    if (D[i] > 0) {
      dp[D[i]] += dp[i];
      dp[D[i]] %= MOD;
    }
  }
  cout << dp[N] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: reference to 'prev' is ambiguous
   18 |     if (prev[C[i]] > 0) {
      |         ^~~~
In file included from /usr/include/c++/14/string:47,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator_base_funcs.h:244:5: note: candidates are: 'template<class _BidirectionalIterator> constexpr _BidirectionalIterator std::prev(_BidirectionalIterator, typename iterator_traits<_Iter>::difference_type)'
  244 |     prev(_BidirectionalIterator __x, typename
      |     ^~~~
a.cc:7:5: note:                 'int prev [200005]'
    7 | int prev[200005];
      |     ^~~~
a.cc:19:9: error: reference to 'prev' is ambiguous
   19 |       D[prev[C[i]]] = i;
      |         ^~~~
/usr/include/c++/14/bits/stl_iterator_base_funcs.h:244:5: note: candidates are: 'template<class _BidirectionalIterator> constexpr _BidirectionalIterator std::prev(_BidirectionalIterator, typename iterator_traits<_Iter>::difference_type)'
  244 |     prev(_BidirectionalIterator __x, typename
      |     ^~~~
a.cc:7:5: note:                 'int prev [200005]'
    7 | int prev[200005];
      |     ^~~~
a.cc:21:5: error: reference to 'prev' is ambiguous
   21 |     prev[C[i]] = i;
      |     ^~~~
/usr/include/c++/14/bits/stl_iterator_base_funcs.h:244:5: note: candidates are: 'template<class _BidirectionalIterator> constexpr _BidirectionalIterator std::prev(_BidirectionalIterator, typename iterator_traits<_Iter>::difference_type)'
  244 |     prev(_BidirectionalIterator __x, typename
      |     ^~~~
a.cc:7:5: note:                 'int prev [200005]'
    7 | int prev[200005];
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
#define IL inline
#define _  200005
#define ll long long
#define RG register
using namespace std ;

IL int gi() {
	RG int data = 0 , fu = 1 ; RG char ch = 0 ;
	while(ch != '-' && (ch < '0' || ch > '9')) ch = getchar() ; if(ch == '-') fu = -1 , ch = getchar() ;
	while('0' <= ch && ch <= '9') data = (data << 1) + (data << 3) + (ch ^ 48) , ch = getchar() ; return data * fu ;
}

#define mod 1000000007

int n , a[_] ,pos[_] , f[_] ;

int main() {
	n = gi() ; for(int i = 1; i <= n; i ++) a[i] = gi() ; 
	f[0] = 1 ;
	for(int i = 1; i <= n; i ++) {
		f[i] = f[i - 1] ;
		if(pos[a[i]] && pos[a[i]] != i - 1) f[i] = (f[i] + f[pos[a[i]]]) % mod
		pos[a[i]] = i ; 
	}
	cout << f[n] << endl ; return 0 ; 
}


Compiler output:
a.cc: In function 'int gi()':
a.cc:9:16: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    9 |         RG int data = 0 , fu = 1 ; RG char ch = 0 ;
      |                ^~~~
a.cc:9:27: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    9 |         RG int data = 0 , fu = 1 ; RG char ch = 0 ;
      |                           ^~
a.cc:9:44: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    9 |         RG int data = 0 , fu = 1 ; RG char ch = 0 ;
      |                                            ^~
a.cc: In function 'int main()':
a.cc:24:17: error: expected ';' before 'pos'
   24 |                 pos[a[i]] = i ;
      |                 ^~~
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <random>
#include <chrono>

using namespace std;

typedef long long ll;
typedef long double ld;
#define fastInp cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);

const ll SIZE = 1e5 * 2 + 10, INF = 1e9 + 10, MOD = 1e9 + 7;

vector<vector<ll>> graph;

bool used[SIZE];

void dfs(int v) {
    used[v] = 1;
    for (auto to : graph[v]) {
        if (!used[to]) dfs(to);
    }
}

int main()
{
    fastInp;

    cout << "NO"
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:17: error: expected ';' before 'return'
   34 |     cout << "NO"
      |                 ^
      |                 ;
   35 |     return 0;
      |     ~~~~~~
Language: C++

    #include<bits/stdc++.h>
    using namespace std;
    int main(){
      int n,a,b;
      cin>>n>>a>>b;
      int temp= a;
      int count1=0;
      while(temp){
        count1++;
        temp=(temp>>1);
      }
      temp= b;
      int count2=0;
      while(temp){
        count2++;
        temp=(temp>>1);
      }
      
      if(count1==count2&&count2==n){
        vector<int> v1(n);
        for(int i=0 ; i<1<<n ; i++) v1.push_back(i^(i>>1));
        return v1;
      }
      return -1;   
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:22:16: error: cannot convert 'std::vector<int>' to 'int' in return
   22 |         return v1;
      |                ^~
      |                |
      |                std::vector<int>
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int n,a,b;
  cin>>n>>a>>b;
  int temp= a;
  int count1=0;
  while(temp){
    count1++;
    temp=(temp>>1);
  }
  temp= b;
  int count2=0;
  while(temp){
    count2++;
    temp=(temp>>1);
  }
  
  if(count1==count2&&count2==n){
    vector<int> v1(n);
    for(int i=0 ; i<1<<n ; i++) res.push_back(i^(i>>1));
    return v1;
  }
  return -1;   
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:33: error: 'res' was not declared in this scope
   21 |     for(int i=0 ; i<1<<n ; i++) res.push_back(i^(i>>1));
      |                                 ^~~
a.cc:22:12: error: cannot convert 'std::vector<int>' to 'int' in return
   22 |     return v1;
      |            ^~
      |            |
      |            std::vector<int>
Language: C++

#include <bits/stdc++.h>

using namespace std;

int Dif(int a, int b) {return __builtin_popcount(a^b);}
vector <int> Solve(int n, int u, int v)
{
    vector <int> res;
    if (n == 0) return res = {u, v};
    int Z = (1<<n)&u, ZZ = Z^(1<<n);
    if ((u>>n) == (v>>n)) {
        vector <int> vec = Solve(n-1, u^Z, v^Z);
        vector <int> _vec = Solve(n-1, vec[0], vec[1]);
        res.push_back(vec[0]^Z);
        for (int i : _vec) res.push_back(i^ZZ);
        for (int i = 1; i < vec.size(); i++) res.push_back(vec[i]^Z);
    }
    else {
        vector <int> vec = Solve(n-1, u^Z, __builtin_popcount(u^Z)&1^1);
        vector <int> _vec = Solve(n-1, __builtin_popcount(v^ZZ)&1^1, v^ZZ);
        for (int i : vec) res.push_back(i^Z);
        if (Dif(__builtin_popcount(u^Z), __builtin_popcount(v^ZZ))) != 1) assert(0);
        for (int i : _vec) res.push_back(i^ZZ);
    }
    return res;
}

int main()
{
    int n, a, b; cin >> n >> a >> b;
    if (__builtin_popcount(a) == __builtin_popcount(b)) return cout << "NO\n", 0;
    vector <int> ans = Solve(n-1, a, b);
    cout << "YES\n";
    for (int i : ans) cout << i << " ";
    cout << "\n";

    return 0;
}


Compiler output:
a.cc: In function 'std::vector<int> Solve(int, int, int)':
a.cc:22:69: error: expected primary-expression before '!=' token
   22 |         if (Dif(__builtin_popcount(u^Z), __builtin_popcount(v^ZZ))) != 1) assert(0);
      |                                                                     ^~
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <string>

using ll = long long;

using namespace std;

int main() {
    int n, a, b;
    cin >> n >> a >> b;
    int x = a ^ b;
    vector<int> odd, palette;
    for (int i=0; i<n; i++) {
        int d = 1 << i;
        if (x & d) 
            odd.push_back(d);
        else {
            palette.push_back(d);
            palette.push_back(d);
        }
    }
    if (odd.size() % 2 == 0) {
        cout << "NO" << '\n';
        return 0;
    }
    cout << "YES" << '\n';
    int twice = odd.size() - 1;
    for (int i=0; i<twice; i++) {
        palette.push_back(odd[i]);
        palette.push_back(odd[(i+1) % twice]);
    }
    palette.push_back(odd[twice]);
    copy(palette.begin(), palette.end(), ostream_iterator<int>(cerr, " "));
    cout << '\n';
    int len = (1 << n), p = a;
    cout << p << ' ';
    for (int i=1; i<len; i++) {
        int d = i & -i,
            log = 0;
        while (!(d & (1 << log))) log++;
        p ^= palette[2*log + (i < len / 2)];
        cout << p << ' ';
    }
    cout << '\n';
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:42: error: 'ostream_iterator' was not declared in this scope
   36 |     copy(palette.begin(), palette.end(), ostream_iterator<int>(cerr, " "));
      |                                          ^~~~~~~~~~~~~~~~
a.cc:5:1: note: 'std::ostream_iterator' is defined in header '<iterator>'; this is probably fixable by adding '#include <iterator>'
    4 | #include <queue>
  +++ |+#include <iterator>
    5 | #include <string>
a.cc:36:59: error: expected primary-expression before 'int'
   36 |     copy(palette.begin(), palette.end(), ostream_iterator<int>(cerr, " "));
      |                                                           ^~~
Language: C++

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


vector<int> v;
int n,a,b;
int o[1111111];
int f(int n)
{
    int k=0;
    for(;n;n/=2)
        k+=n%2;
    return k;
}

int main()
{
	scanf("%d %d %d",&n,&a,&b);
	if(f(a^b)%2==0)
    {
        puts("NO");
        return 0;
    }
	v.push_back(0);
	for(int i=0;i<=n-f(a^b);i++)
    {
        vector<int> v1;
        v1=v;
        for(int j=0;j<v1.size();j++)
            v1[j]*=2;
        for(int j=1;j<=v.size();j++)
            v1.push_back((v[v.size()-j]*2)^1);
        v=v1;
    }
    for(int i=0;i<f(a^b)/2;i++)
    {
        vector<int> v1;
        v1.push_back(v[0]*4);
        v1.push_back(v[0]*4+1);
        v1.push_back(v[0]*4+3);
        v1.push_back(v[0]*4+2);
        for(int i=1;i<v.size()-1;i+=2)
        {
            v1.push_back(v[i]*4+2);
            v1.push_back(v[i]*4+3);
            v1.push_back(v[i]*4+1);
            v1.push_back(v[i]*4+0);
            v1.push_back(v[i+1]*4+0);
            v1.push_back(v[i+1]*4+1);
            v1.push_back(v[i+1]*4+3);
            v1.push_back(v[i+1]*4+2);
        }
        v1.push_back(v[v.size()-1]*4+2);
        v1.push_back(v[v.size()-1]*4+0);
        v1.push_back(v[v.size()-1]*4+1);
        v1.push_back(v[v.size()-1]*4+3);
        v=v1;
    }
    vector<int> v1;
    for(int p=0;p<n;p++)
        if((a^b)&(1<<i)) v1.push_back(p);
    for(int i=0;i<v1.size();i++)
    {
        for(int j=0;j<v.size();j++)
        {
            int n=(v[j]>>v1[i])%2,m=(v[j]>>i)%2;
            v[j]^=(1<<v1[i])*n;
            v[j]^=(1<<i)*m;
            v[j]^=(1<<i)*n;
            v[j]^=(1<<v1[i])*m;
        }
    }
    if((v[0]^v[v.size()-1])!=(a^b)) a=1/0;
    puts("YES");
    for(int j=1;j<v.size();j++)
        if(f(v[j]^v[j-1])!=1) a/0;//puts("@");
    for(int j=0;j<v.size();j++)
    {
        v[j]^=a;
        if(o[v[j]]) a=1/0;//puts("#");
        o[v[j]]++;
    }
    if(f(v[v.size()-1]^v[0])!=f(a^b)) a=1/0;
    //if(b!=v[v.size()-1]) a=1/0;
    for(int j=0;j<v.size();j++)
        printf("%d ",v[j]);
        //printf("%d %d",v[0],v[v.size()-1]);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:61:22: error: 'i' was not declared in this scope
   61 |         if((a^b)&(1<<i)) v1.push_back(p);
      |                      ^
a.cc:73:40: warning: division by zero [-Wdiv-by-zero]
   73 |     if((v[0]^v[v.size()-1])!=(a^b)) a=1/0;
      |                                       ~^~
a.cc:76:32: warning: division by zero [-Wdiv-by-zero]
   76 |         if(f(v[j]^v[j-1])!=1) a/0;//puts("@");
      |                               ~^~
a.cc:80:24: warning: division by zero [-Wdiv-by-zero]
   80 |         if(o[v[j]]) a=1/0;//puts("#");
      |                       ~^~
a.cc:83:42: warning: division by zero [-Wdiv-by-zero]
   83 |     if(f(v[v.size()-1]^v[0])!=f(a^b)) a=1/0;
      |                                         ~^~
Language: C++

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


vector<int> v;
int n,a,b;
int o[1111111];
int f(int n)
{
    int k=0;
    for(;n;n/=2)
        k+=n%2;
    return k;
}

int main()
{
	scanf("%d %d %d",&n,&a,&b);
	if(f(a^b)%2==0)
    {
        puts("NO");
        return 0;
    }
	v.push_back(0);
	for(int i=0;i<=n-f(a^b);i++)
    {
        vector<int> v1;
        v1=v;
        for(int j=0;j<v1.size();j++)
            v1[j]*=2;
        for(int j=1;j<=v.size();j++)
            v1.push_back((v[v.size()-j]*2)^1);
        v=v1;
    }
    for(int i=0;i<f(a^b)/2;i++)
    {
        vector<int> v1;
        v1.push_back(v[0]*4);
        v1.push_back(v[0]*4+1);
        v1.push_back(v[0]*4+3);
        v1.push_back(v[0]*4+2);
        for(int i=1;i<v.size()-1;i+=2)
        {
            v1.push_back(v[i]*4+2);
            v1.push_back(v[i]*4+3);
            v1.push_back(v[i]*4+1);
            v1.push_back(v[i]*4+0);
            v1.push_back(v[i+1]*4+0);
            v1.push_back(v[i+1]*4+1);
            v1.push_back(v[i+1]*4+3);
            v1.push_back(v[i+1]*4+2);
        }
        v1.push_back(v[v.size()-1]*4+2);
        v1.push_back(v[v.size()-1]*4+0);
        v1.push_back(v[v.size()-1]*4+1);
        v1.push_back(v[v.size()-1]*4+3);
        v=v1;
    }
    vector<int> v1;
    for(int i=(a^b),p=0;i;i/=2,p++)
        if(i%2) v1.push_back(p);
    for(int i=0;i<v1.size();i++)
    {
        for(int j=0;j<v.size();j++)
        {
            int n=((1<<v1[i])&v[j]),m=((1<<i)&v[j]);
            if((n&&!m)||(!n&&m))
                v[j]=v[j]^(1<<v1[i])^(1<<i);
        }
    }
    puts("YES");
    for(int j=1;j<v.size();j++)
        if(f(v[j]^v[j-1])!=1) a/0;//puts("@");
    for(int j=0;j<v.size();j++)
    {
        v[j]^=a;
        if(o[v[j]]) a=1/0;//puts("#");
        o[v[j]]++;
    }
    for(int j=0;j<v.size();h++)
        printf("%d ",v[j]);
        //printf("%d %d",v[0],v[v.size()-1]);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:73:32: warning: division by zero [-Wdiv-by-zero]
   73 |         if(f(v[j]^v[j-1])!=1) a/0;//puts("@");
      |                               ~^~
a.cc:77:24: warning: division by zero [-Wdiv-by-zero]
   77 |         if(o[v[j]]) a=1/0;//puts("#");
      |                       ~^~
a.cc:80:28: error: 'h' was not declared in this scope
   80 |     for(int j=0;j<v.size();h++)
      |                            ^
Language: C++

#include <bits/stdc++.h>

using namesapce std;

int main() {
  	int n, a, b;
 	scanf("%d%d%d", &n, &a, &b);
  	b ^= a;
  	if (a != (1 << (n - 1))) puts("NO");
    else throw;
    return 0;
}

Compiler output:
a.cc:3:7: error: expected nested-name-specifier before 'namesapce'
    3 | using namesapce std;
      |       ^~~~~~~~~
Language: C++

#include <bits/stdc++.h>

using namesapce std;

int main() {
  	int n, a, b;
 	scanf("%d%d%d", &n, &a, &b);
  	b ^= a;
  	if (a != (1 << (n - 1)) puts("NO");
    else throw;
    return 0;
}

Compiler output:
a.cc:3:7: error: expected nested-name-specifier before 'namesapce'
    3 | using namesapce std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:9:32: error: expected ';' before 'puts'
    9 |         if (a != (1 << (n - 1)) puts("NO");
      |                                ^~~~~
      |                                ;
a.cc:10:5: error: expected primary-expression before 'else'
   10 |     else throw;
      |     ^~~~
a.cc:9:44: error: expected ')' before 'else'
    9 |         if (a != (1 << (n - 1)) puts("NO");
      |            ~                               ^
      |                                            )
   10 |     else throw;
      |     ~~~~
Language: C++

//第8回シンデレラガール総選挙は是非本田未央ちゃんに投票をお願いします！
//ファンのことも他のアイドルの子たちのことも本当に大事にしてて、今まで周りに色んなものを与えてくれました。
//今度は私たちが未央ちゃんにお返しをする番です。みんなでガラスの靴を履かせてあげましょう！
// #本田未央を一番星に #本田未央を令和のシンデレラガールに #第8回シンデレラガール総選挙
#include<vector>
#include<cmath>
#include<map>
#include<cstdlib>
#include<iostream>
#include<sstream>
#include<fstream>
#include<string>
#include<algorithm>
#include<cstring>
#include<cstdio>
#include<set>
#include<stack>
#include<bitset>
#include<functional>
#include<ctime>
#include<queue>
#include<deque>
#include<complex>
#include<cassert>
using namespace std;
#define pb push_back
#define pf push_front
typedef long long lint;
typedef complex<double> P;
#define mp make_pair
#define fi first
#define se second
typedef pair<int,int> pint;
#define All(s) s.begin(),s.end()
#define rAll(s) s.rbegin(),s.rend()
#define REP(i,a,b) for(int i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)
int out[(1<<17)+10];
int n;
void sw(int a,int b){
	rep(i,(1<<n)){
		int x=0,y=0;
		if((out[i]&(1<<a))>0) x=1;
		if((out[i]&(1<<b))>0) y=1;
		out[i]-=(x<<a);out[i]+=(x<<b);
		out[i]-=(y<<b);out[i]+=(y<<a);
	}
}
int main()
{
	int a,b,c,d;
	cin>>n>>a>>b;c=(a^b);d=__builtin_popcount(c);
	if(d%2==0){
		//assert(false);
		cout<<"NO"<<endl;return 0;
	}
	rep(i,(1<<n)){
		out[i]=(i^(i/2));
	}
	for(int i=d-2;i>0;i-=2){
		rep(j,(1<<(i-1))) swap(out[(1<<n)-1-j],out[(1<<n)-1-j-(1<<i)]);
	}
	/*rep(i,(1<<n)-1){
		if(__builtin_popcount((out[i]^out[i+1]))!=1){
			cout<<i<<' '<<out[i]<<' '<<out[i+1]<<endl;
		}
	}*/
	vector<int> from,to;
	rep(i,n){
		if((out[(1<<n)-1]&(1<<i)) && (c&(1<<i))) continue;
		if((out[(1<<n)-1]&(1<<i))) from.pb(i);
		if((c&(1<<i))) to.pb(i);
	}
	rep(i,(int)from[i].size()){
		sw(from[i],to[i]);
	}
	rep(i,(1<<n)) out[i]^=a;
	assert(out[0]==a);
	assert(out[(1<<n)-1]==b);
	rep(i,(1<<n)-1){
		if(__builtin_popcount((out[i]^out[i+1]))!=1){
			//cout<<i<<' '<<out[i]<<' '<<out[i+1]<<endl;
			assert(false);
		}
	}
	cout<<"YES"<<endl;
	rep(i,(1<<n)){
		cout<<out[i];
		if(i<(1<<n)-1) cout<<' ';else cout<<endl;
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:74:28: error: request for member 'size' in 'from.std::vector<int>::operator[](((std::vector<int>::size_type)i))', which is of non-class type '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'}
   74 |         rep(i,(int)from[i].size()){
      |                            ^~~~
a.cc:36:34: note: in definition of macro 'REP'
   36 | #define REP(i,a,b) for(int i=a;i<b;i++)
      |                                  ^
a.cc:74:9: note: in expansion of macro 'rep'
   74 |         rep(i,(int)from[i].size()){
      |         ^~~
Language: C++

//第8回シンデレラガール総選挙は是非本田未央ちゃんに投票をお願いします！
//ファンのことも他のアイドルの子たちのことも本当に大事にしてて、今まで周りに色んなものを与えてくれました。
//今度は私たちが未央ちゃんにお返しをする番です。みんなでガラスの靴を履かせてあげましょう！
// #本田未央を一番星に #本田未央を令和のシンデレラガールに #第8回シンデレラガール総選挙
#include<vector>
#include<cmath>
#include<map>
#include<cstdlib>
#include<iostream>
#include<sstream>
#include<fstream>
#include<string>
#include<algorithm>
#include<cstring>
#include<cstdio>
#include<set>
#include<stack>
#include<bitset>
#include<functional>
#include<ctime>
#include<queue>
#include<deque>
#include<complex>
#include<cassert>
using namespace std;
#define pb push_back
#define pf push_front
typedef long long lint;
typedef complex<double> P;
#define mp make_pair
#define fi first
#define se second
typedef pair<int,int> pint;
#define All(s) s.begin(),s.end()
#define rAll(s) s.rbegin(),s.rend()
#define REP(i,a,b) for(int i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)
int out[(1<<17)+10];
int n;
void sw(int a,int b){
	rep(i,(1<<n)){
		int x=0,y=0;
		if((out[i]&(1<<a))>0) x=1;
		if((out[i]&(1<<b))>0) y=1;
		out[i]-=(x<<a);out[i]+=(x<<b);
		out[i]-=(y<<b);out[i]+=(y<<a);
	}
}
int main()
{
	int a,b,c,d;
	cin>>n>>a>>b;c=(a^b);d=__builtin_popcount(c);
	if(d%2==0){
		//assert(false);
		cout<<"NO"<<endl;return 0;
	}
	rep(i,(1<<n)){
		out[i]=(i^(i/2));
	}
	for(int i=d-2;i>0;i-=2){
		rep(j,(1<<(i-1))) swap(out[(1<<n)-1-j],out[(1<<n)-1-j-(1<<i)]);
	}
	/*rep(i,(1<<n)-1){
		if(__builtin_popcount((out[i]^out[i+1]))!=1){
			cout<<i<<' '<<out[i]<<' '<<out[i+1]<<endl;
		}
	}*/
	vector<int> from,to;
	rep(i,n){
		if((out[(1<<n)-1]&(1<<i)) && (c&(1<<i))) continue;
		if((out[(1<<n)-1]&(1<<i))) from.pb(i);
		if((c&(1<<i))) to.pb(i);
	}
	rep(i,from[i].size()){
		sw(from[i],to[i]);
	}
	rep(i,(1<<n)) out[i]^=a;
	assert(out[0]==a);
	assert(out[(1<<n)-1]==b);
	rep(i,(1<<n)-1){
		if(__builtin_popcount((out[i]^out[i+1]))!=1){
			//cout<<i<<' '<<out[i]<<' '<<out[i+1]<<endl;
			assert(false);
		}
	}
	cout<<"YES"<<endl;
	rep(i,(1<<n)){
		cout<<out[i];
		if(i<(1<<n)-1) cout<<' ';else cout<<endl;
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:74:23: error: request for member 'size' in 'from.std::vector<int>::operator[](((std::vector<int>::size_type)i))', which is of non-class type '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'}
   74 |         rep(i,from[i].size()){
      |                       ^~~~
a.cc:36:34: note: in definition of macro 'REP'
   36 | #define REP(i,a,b) for(int i=a;i<b;i++)
      |                                  ^
a.cc:74:9: note: in expansion of macro 'rep'
   74 |         rep(i,from[i].size()){
      |         ^~~
Language: C++

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

int main() {
	assert(n<=10);
}

Compiler output:
In file included from /usr/include/c++/14/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:106,
                 from a.cc:1:
a.cc: In function 'int main()':
a.cc:5:16: error: 'n' was not declared in this scope; did you mean 'yn'?
    5 |         assert(n<=10);
      |                ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned ui;
typedef unsigned long long ul;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;
typedef pair<bool, bool> pbb;
typedef vector<int> vi;
#define pb push_back
#define fi first
#define se second
#define mid ((l + r) >> 1)
#define ls (i << 1)
#define rs (i << 1 | 1)
#define enum(i, j, k) for(int i = j; i <= (k); i ++)
#define open(i, j, k) for(int i = j; i <  (k); i ++)
#define dec(i, j, k)  for(int i = j; i >= (k); i --)
#define ae(x) for(node *p = h[x]; p; p = p->nxt)
#define fill(x, k) memset(x, k, sizeof x)
#define copy(x, y) memcpy(x, y, sizeof x)
#define fio(x) freopen(x".in", "r", stdin); freopen(x".out", "w", stdout);
template <class T> bool chkmin(T &x, T y)
{ return y < x ? (x = y , true) : false; }
template <class T> bool chkmax(T &x, T y)
{ return y > x ? (x = y , true) : false; }
void __init()
{
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cout << fixed << setprecision(16);
    srand(time(0) ^ ui(ul(new char)));
}
/* default code ends here */
int n, a, b;
int op[500100];
bool flag[20];
void work(int l, int r, int t)
{
	if(l == r)
	{
		op[l] = t;
		return ;
	}
	int k = __builtin_ctz(t);
	flag[k] = false;
	int g = 0;
	while(!flag[g])
		g ++;
	work(l, mid - 1, t ^ 1 << k ^ 1 << g);
	op[mid] = 1 << k;
	memcpy(op + mid + 1, op + l, sizeof (int) * (mid - l));
	flag[k] = true;
}
int main()
{
	__init();
	cin >> n >> a >> b;
	if(__builtin_popcount(a ^ b) % 2 == 0)
		return cout << "NO" << endl, 0;
	cout << "YES" << endl;
	memset(flag, true, sizeof flag);
	work(1, (1 << n) - 1, a ^ b);
	int x = a;
	cout << x << ' ';
	open(i, 1, 1 << n)
	{
		assert(__builtin_popcount(op[i]) == 1)
		x ^= op[i];
		cout << x << ' ';
	}
	assert(x == b);
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:70:17: error: expected ';' before 'x'
   70 |                 x ^= op[i];
      |                 ^
Language: C++

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

typedef long long ll;
ll MOD = 1e9+7;

vector<ll> gray;//n-1ビットのグレイコード
vector<ll> ring;

//nビットのグレイコードを生成
vector<ll> generategraycode(int n)
{
	vector<ll> ret;
	for(int i=0;i<(1<<n);i++)
	{
		ll x=i^(i>>1);
		ret.push_back(x);
	}
	return ret;
}

int main()
{
	int n;
	ll a,b;
	int ans=0;
	cin>>n>>a>>b;
	if(n==1)
	{
		cout<<"YES"<<endl;
		cout<<a<<" "<<b<<endl;
		return 0;
	}
	gray=generategraycode(n);
	ll xor = (a^b);
	int cnt=0;
	//xorの立っているビットの数を調べる
	for(int i=1;i<(1<<25);i*=2)
	{
		if((i&xor)>0)
			cnt++;
	}
	//aとbの変わっているビットの数が1でなければ作れない
	if(cnt!=1)
	{
		cout<<"NO"<<endl;
		return 0;
	}
	//それ以外はYES
	//graycodeのどこにあたるかを確認する
	int l=0;
	int r=0;
	for(int i=0;i<gray.size();i++)
	{
		if(gray[i]==a)
		{
			if(gray[i-1]==b)
			{
				l=i;
				r=i-1;
				for(int j=i;j<gray.size();j++)
					ring.push_back(gray[j]);
				for(int j=0;j<i;j++)
					ring.push_back(gray[j]);
				break;
			}else if(gray[i+1]==b){
				l=i;
				r=i+1;
				for(int j=i;j>-1;j--)
					ring.push_back(gray[j]);
				for(int j=gray.size()-1;j>i;j--)
					ring.push_back(gray[j]);
				break;
			}
		}
	}
	cout<<"YES"<<endl;
	for(int i=0;i<ring.size();i++)
	{
		cout<<ring[i]<<" ";
		cerr<<bitset<18>(ring[i])<<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:12: error: expected unqualified-id before 'xor' token
   41 |         ll xor = (a^b);
      |            ^~~
a.cc:46:23: error: expected primary-expression before 'xor' token
   46 |                 if((i&xor)>0)
      |                       ^~~
a.cc:46:26: error: expected primary-expression before ')' token
   46 |                 if((i&xor)>0)
      |                          ^
Language: C++

#include <intrin.h>
#define __builtin_popcount __popcnt
#endif
#include <iostream>
#include <vector>
using namespace std;

vector<int> dfs(int to,int use){
	vector<int> ret,add;
	if(use == 0 || __builtin_popcount(to&use)%2==0){
		return ret;
	}
	int dif = 0;
	while((use&(1<<dif))==0 || (to&(1<<dif))==0)
		dif++;
	if(__builtin_popcount(use)==1){
		ret.push_back(dif);
		return ret;
	}
	int nuse = use^(1<<dif);
	int change = 0;
	while((use&(1<<change))==0 || (change==dif) )
		change++;
	int mid = (1<<change);
	ret = dfs(mid,nuse);
	ret.push_back(dif);
	add = dfs((to^mid),nuse);
	ret.insert(ret.end(),add.begin(),add.end());
	return ret;
}

int main(){
	int N,A,B;
	cin>>N>>A>>B;
	vector<int> ans;
	ans = dfs(A^B,(1<<N)-1);
	int begin = A;
	if(ans.size()==0){
		cout<<"NO"<<endl;
	}else{
		cout<<"YES"<<endl;
		cout<<begin<<" ";
		for(int i = 0;i < ans.size();i++){
			begin ^= (1<<ans[i]);
			cout<<begin;
			if(i+1 < ans.size()){
				cout<<" ";
			}
		}
		cout<<endl;
	}
}

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

#include <cstdio>
#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <functional>

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

#define repi(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,a) repi(i,0,a)

bool isodd(ll a, int N){
  ll mask = 1;
  int cnt = 0;
  rep(i, N){
    if(a & mask) cnt++;
    mask = mask << 1;
  }
  return cnt % 2;
}

int diff_idx(ll a, ll b, int N){
  ll mask = 1;
  ll axorb  = a ^ b;
  rep(i, N){
    if(axorb & mask) return i;
    mask = mask << 1;
  }
  return -1;
}

v differ_by_1bit(ll a, ll b, int N){
  v ans;
  if(N == 1){
    ans.push_back(a);
    ans.push_back(b);
  }else{
    int atail = a % 2;
    int btail = b % 2;
    ll a_ = a / 2;
    ll b_ = b / 2;

    if(atail == btail){
      v ch = differ_by_1bit(a_, b_, N-1);
      int tail = atail;
      rep(i, 1 << (N-1)){
        ans.push_back(ch[i] * 2 + tail);
        ans.push_back(ch[i] * 2 + 1 - tail);
        tail = 1 - tail;
      }
    }else{
      v ch1 = differ_by_1bit(a_, a_^1, N-1);
      v ch2 = differ_by_1bit(a_^1, b_, N-1);
      rep(i, 1 << (N-1)) ans.push_back(ch1[i] * 2 + atail);
      rep(i, 1 << (N-1)) ans.push_back(ch2[i] * 2 + btail);
    }
  }
  return ans;
}

int main(){
  int N;
  ll A, B;
  scanf("%d %lld %lld", &N, &A, &B);
  if(isodd(A, N) == isodd(B, N)){
    cout << "NO" << endl;
  }else{
    cout << "YES" << endl;
    v ans = differ_by_1bit(A, B, N);
    rep(i, 1 << N)
      cout << ans[i] << (i == ((1<<N)-1) ? '\n' : ' ');
  }
  return 0;
}


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

#include<iostream>
#include<vector>
using namespace std;
int ze(int a) {
  return max(a, -a);
}
int rem(int a[], int N) {
  int an = a[N - 1];
  for (int i = N - 2; i >= 0; i --) {
    an *= 2;
    an += a[i];
  }
  return an;
}
int main () {
  int N, A, B;
  cin >> N >> A >> B;
  int bi[18];
  bi[0] = 1;
  for (int i = 1; i < 18; i ++) bi[i] = bi[i - 1] * 2;
  int bita[18];
  int bitb[18];
  vector<vector<int>>ans(bi[N],vector<int>(N, -1));
  int a = A;
  int b = B;
  int sa = 0;
  int sb = 0;
  for (int i = 0; i < N; i ++) {
    bita[i] = a % 2;
    bitb[i] = b % 2;
    a /= 2;
    b /= 2;
    sa += bita[i];
    sb += bitb[i];
  }
  if (!(ze(sa - sb) % 2)) {
    cout << "NO" << endl;
    return 0;
  }
  cout << "YES" << endl;
  for (int i = 0; i < N; i ++) {
    ans[0][i] = bita[i];
    ans[bi[N] - 1][i] = bitb[i];
  for (int i = N - 1; i > 0; i --) {
    for (int j = 0; j < i;) {
      if (ans[k * bi[i] - 1][j] != ans[(k - 1) * bi[i] - 1][j]) {
        for (int l = (k - 1) * bi[i]; l < (2 * k - 1) * bi[i - 1]; l ++) {
          ans[l][j] = ans[(k - 1) * bi[i] - 1][j];
        }
        for (int l = (2 * k - 1) * bi[i - 1]; l < k * bi[i] - 1) {
          ans[l][j] = ans[k * bi[i] - 1][j];
        }
        j = i;
      }
      j ++;
    }
      
    
  
  
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:46:15: error: 'k' was not declared in this scope
   46 |       if (ans[k * bi[i] - 1][j] != ans[(k - 1) * bi[i] - 1][j]) {
      |               ^
a.cc:50:64: error: expected ';' before ')' token
   50 |         for (int l = (2 * k - 1) * bi[i - 1]; l < k * bi[i] - 1) {
      |                                                                ^
      |                                                                ;
a.cc:56:6: error: expected '}' at end of input
   56 |     }
      |      ^
a.cc:44:36: note: to match this '{'
   44 |   for (int i = N - 1; i > 0; i --) {
      |                                    ^
a.cc:56:6: error: expected '}' at end of input
   56 |     }
      |      ^
a.cc:41:32: note: to match this '{'
   41 |   for (int i = 0; i < N; i ++) {
      |                                ^
a.cc:56:6: error: expected '}' at end of input
   56 |     }
      |      ^
a.cc:15:13: note: to match this '{'
   15 | int main () {
      |             ^
Language: C++

#include<iostream>
#include<queue>
using namespace std; // 575

#define int unsigned int

const int MAX = 131072;
bool use[MAX];

int bitxor(int N) {
	int ret = 0;
	for (;N > 0;N /= 2) ret += N & 1;
	return ret;
}

bool ans(int N, int M, int c, int A) {
	if (use[N]) return false;
	use[N] = true;
	if (c == 1 && N == A) {
		cout << "YES" << endl;
		cout << N << " ";
		return true;
	}
	for (int i = 0;(1 << i) < M;++ i) {
		if (ans(N ^ (1 << i), M, c - 1, A)) {
			cout << N << " ";
			return true;
		}
	}
	use[N] = false;
}
int main() {
	int N, A, B;
	cin >> N >> A >> B;
	if ((bitxor(A ^ B) & 1) == 0) {
		cout << "NO";
		return 0;
	}
	for (int i = 0;i < (1 << N);++ i) use[i] = false;
	ans(B, 1 << N, 1 << N, A);
	return 0;
}
/*
31536000のコメント解説欄
ここテンプレで用意してるから、A問題とかだとこの先空欄の危険あり
また、コンテスト後に https://31536000.hatenablog.com/ で解説していると思うので、良かったら読んでねー

まず、AとBのそれぞれの桁xor和が同値なら不可能(Nim的な)
それ以外なら可能っぽい？


*/


Compiler output:
a.cc:5:22: error: '::main' must return 'int'
    5 | #define int unsigned int
      |                      ^~~
a.cc:32:1: note: in expansion of macro 'int'
   32 | int main() {
      | ^~~
a.cc: In function 'bool ans(unsigned int, unsigned int, unsigned int, unsigned int)':
a.cc:30:16: warning: control reaches end of non-void function [-Wreturn-type]
   30 |         use[N] = false;
      |         ~~~~~~~^~~~~~~
Language: C++

N, A, B = map(int, input().split())

mask = A ^ B
c = bin(mask).count('1')
rem = pow(2, N) - 1 - c
if rem%2 == 0:
    print('YES')
    print(A)
    if rem > 0:
        tmp = A
        for i in range(rem):
            tmp = tmp ^ 1
            print(tmp)
             
    tmp = A
    for i in range(N):
        if mask & 1 == 1:
            tmp = tmp ^ pow(2, i)
            print(tmp)
        mask = mask >> 1

else:
    print('NO')


Compiler output:
a.cc:7:11: warning: multi-character character constant [-Wmultichar]
    7 |     print('YES')
      |           ^~~~~
a.cc:23:11: warning: multi-character character constant [-Wmultichar]
   23 |     print('NO')
      |           ^~~~
a.cc:1:1: error: 'N' does not name a type
    1 | N, A, B = map(int, input().split())
      | ^
Language: C++

#include <iostream>
#include <vector>
using namespace std;
vector<int> v[200000],p;
int w[200000];
int n,a,b;
void f(int x){
    p.push_back(x);
    w[x]=0;
    for(int i=0;i<v[x].size();i++){
        int y=v[x][i];
        w[y]--;
    }
    for(int i=0;i<v[x].size();i++){
        int y=v[x][i];
        if(y!=b&&w[y]>1){
            f(y);
            return;
        }
    }
    for(int i=0;i<v[x].size();i++){
        int y=v[x][i];
        if(y!=b&&w[y]>0){
            f(y);
            return;
        }
    }
    p.push_back(b);
}
int main(void){
    cin>>n>>a>>b;
    if(n==1){
        cout<<"YES"<<endl;
        cout<<a<<" "<<b<<endl;
        return 0;
    }

    int c=0;
    for(int i=0;i<n;i++){
        if(((a>>i)&1)!=((b>>i)&1)){
            c++;
        }
    }
    if(c%2==0){
        cout<<"NO"<<endl;
        return 0;
    else{
        cout<<"YES"<<endl;
    }
    for(int i=0;i<(1<<n);i++){
        for(int j=0;j<n;j++){
            int k=((i>>j)&1);
            if(k==0){
                v[i].push_back(i+(1<<j));
            }else{
                v[i].push_back(i-(1<<j));
            }
        }
    }
    fill(w, w+(1<<n), n);
    f(a);
    int q=p.size();
    for(int i=0;i<q;i++){
        cout<<p[i];
        if(i<q-1)cout<<" ";
    }
    cout<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:47:5: error: expected '}' before 'else'
   47 |     else{
      |     ^~~~
a.cc:44:15: note: to match this '{'
   44 |     if(c%2==0){
      |               ^
Language: C++

#include<bits/stdc++.h>
#define X first
#define Y second
#define pb emplace_back
#define FOR(i,a,b) for(int (i)=(a);i<(b);++(i))
#define EFOR(i,a,b) for(int (i)=(a);i<=(b);++(i))
#define rep(X,Y) for (int (X) = 0;(X) < (Y);++(X))
#define reps(X,S,Y) for (int (X) = S;(X) < (Y);++(X))
#define rrep(X,Y) for (int (X) = (Y)-1;(X) >=0;--(X))
#define rreps(X,S,Y) for (int (X) = (Y)-1;(X) >= (S);--(X))
#define all(X) (X).begin(),(X).end()
#define rall(X) (X).rbegin(),(X).rend()
#define eb emplace_back
#define UNIQUE(X) (X).erase(unique(all(X)),(X).end())

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef ll LL;
typedef pii PII;
typedef pll PLL;
template<class T> using vv=vector<vector<T>>;
template<class T> inline bool MX(T &l,const T &r){return l<r?l=r,1:0;}
template<class T> inline bool MN(T &l,const T &r){return l>r?l=r,1:0;}
const ll MOD=1e9+7;

int N, A, B;
vector<int> gray;
int cnt[2];
int cnt2[2];
int perm[20];
vector<int> indices[2];

int main() {
  scanf("%d%d%d", &N, &A, &B);
  
  gray.eb(0);
  gray.eb(1);
  vector<int> prev;
  reps(i, 1, N) {
    vector<int> nxt(gray);
    if (i == N-1) prev = gray;
    reverse(all(gray));
    nxt.insert(nxt.end(), all(gray));
    int di = 1 << i;
    int d = gray.size();
    rep(j, d) {
      nxt[j+d] += di;
    }
    gray.swap(nxt);
  }
  int M =  1 << N;
  assert(gray.size() == M);
  rep(i, M) {
    int x = gray[i] ^ gray[(i+1)%M];
    assert(__builtin_popcount(x) == 1);
  }

  int v = A^B;
  rep(i, N) {
    cnt[v >> i & 1]++;
    cnt2[gray[M-1] >> i & 1]++;
  }

  bool ok = true;
  rep(i, 2) {
    if (cnt[i] != cnt2[i]) {
      ok = false;
    }
  }

  if (ok) {
    rep(i, N) {
      indices[gray[M-1] >> i & 1].eb(i);
    }
    
    rep(i, N) {
      assert(!indices[v >> i & 1].empty());
      perm[indices[v >> i & 1].back()] = i;
      indices[v >> i & 1].pop_back();
    }

    rep(i, M) {
      int v = 0;
      rep(j, N) {
        int t = gray[i] >> j & 1;
        int idx = perm[j];
        v += t << idx;
      }
      gray[i] = v;
      gray[i] ^= A;
    }
    assert(gray[0] == A);
    assert(gray[M-1] == B);
    rep(i, M) {
      int x = gray[i] ^ gray[(i+1)%M];
      assert(__builtin_popcount(x) == 1);
    }

    puts("YES");
    rep(i, M) {
      printf("%d%c", gray[i], " \n"[i==M-1]);
    }
  }

  if ((B^A) != M-1) {
    puts("NO");
    return 0;
  }
  
  puts("YES");
  int t = prev[M/2-1];
  rep(i, N) {
    perm[i] = i;
  }
  rep(i, N) {
    if (t >> i & 1) {
      perm[i] = (i+1)%N;
      perm[(i+1)%N] = i;
    }
  }
  ans = prev;
  reverse(all(prev));
  for (int t : prev) {
    int v = 0;
    rep(i, N) {
      v += t >> i & 1 << perm[i];
    }
    ans.eb(v);
  }
  Out(ans);

}


Compiler output:
a.cc: In function 'int main()':
a.cc:123:3: error: 'ans' was not declared in this scope; did you mean 'abs'?
  123 |   ans = prev;
      |   ^~~
      |   abs
a.cc:132:3: error: 'Out' was not declared in this scope
  132 |   Out(ans);
      |   ^~~
Language: C++

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

string bit(int n){
  string ans="";
  for(int i=0;i<20;i++){
    char c='0'+n%2;
    ans=ans+c;
    n/=2;
  }
  return ans;
}

int two(int n){
  int ans=1;
  for(int i=0;i<n;i++){
    ans*=2;
  }
  return ans;
}

int my_xor(int n,int m){
  string a=bit(n);
  string b=bit(m);
  int ans=0;
  for(int i=0;i<20;i++){
    int x=a.at(i)-'0';
    int y=b.at(i)-'0';
    if(x+y==1){
      ans+=two(i);
    }
  }
  return ans;
}   

int main(){
  int n,a,b;
  cin >> n >> a >> b;
  int c[n];
  string s=bit(a);
  string t=bit(b);
  int count=0;
  for(int i=0;i<n;i++){
    if(s.at(i)!=t.at(i)){
      count++;
      c[i]=1;
    }
    else{
      c[i]=0;
    }
  }
  if(count%2==0){
    cout << "NO" << endl;
  }
  else{
    cout << "YES" << endl;
    int k=two(n);
    int p[k];
    for(int i=0;i<k;i++){
      p[i]=0;
    }
    p[a]++;
    p[b]++;
    int ans=a;
    cout << ans << " ";
    string dif=bit(my_xor(a,b));
    for(int i=0;i<n;i++){
      if(dif.at(i)=='0'&&my_xor(ans,two(i)!=b){
        ans=my_xor(ans,two(i));
        cout << ans << " ";
        p[ans]++;
      }
    }
    int d[n]; 
    for(int i=0;i<n;i++){
      if(c[i]==0){
        d[i]=100+i;
      }
      else{
        d[i]=i;
      }
    }
    sort(d,d+n);
    for(int i=0;i<n;i++){
      d[i]=d[i]%100;
    }
    for(int i=0;i<n;i++){
      d[i]=two(d[i]);
    }
    for(int i=0;i<k-2-n+count;i++){
      int j=0;
      while(p[my_xor(ans,d[j])]!=0){
        j++;
      }
      ans=my_xor(ans,d[j]);
      p[ans]++;
      cout << ans << " ";
    }
    cout << b;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:69:47: error: expected ')' before '{' token
   69 |       if(dif.at(i)=='0'&&my_xor(ans,two(i)!=b){
      |         ~                                     ^
      |                                               )
a.cc:74:5: error: expected primary-expression before '}' token
   74 |     }
      |     ^
Language: C++

#include<iostream>
#include<queue>
using namespace std; // 575

const int MAX = 131072;
bool use[MAX];

int bitxor(int N) {
	int ret = 0;
	for (;N > 0;N /= 2) ret += N & 1;
	return ret;
}

bool ans(int N, int M, int c) {
	if (use[N]) return false;
	use[N] = true;
	if (c == 0) {
		cout << N << " ";
		return true;
	}
	for (int i = 0;i < M;i <<= 1) {
		if (ans(A ^ (1 << i), M, c - 1)) {
			cout << N << " ";
			return true;
		}
	}
	use[N] = false;
}
int main() {
	int N, A, B;
	cin >> N >> A >> B;
	if ((bitxor(A ^ B) & 1) == 0) {
		cout << "NO";
		return 0;
	}
	cout << "YES" << endl;
	for (int i = 0;i < (1 << N);++ i) use[i] = false;
	ans(A, 1 << N, 1 << N);
	return 0;
}
/*
31536000のコメント解説欄
ここテンプレで用意してるから、A問題とかだとこの先空欄の危険あり
また、コンテスト後に https://31536000.hatenablog.com/ で解説していると思うので、良かったら読んでねー

まず、AとBのそれぞれの桁xor和が同値なら不可能(Nim的な)
それ以外なら可能っぽい？


*/

Compiler output:
a.cc: In function 'bool ans(int, int, int)':
a.cc:22:25: error: 'A' was not declared in this scope
   22 |                 if (ans(A ^ (1 << i), M, c - 1)) {
      |                         ^
a.cc:27:16: warning: control reaches end of non-void function [-Wreturn-type]
   27 |         use[N] = false;
      |         ~~~~~~~^~~~~~~
Language: C++

#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)  
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define FORR(i, m, n) for(int i = m;i >= n;i--)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define llong long long
#define pb(a) push_back(a)
#define INF 999999999
using namespace std;
typedef pair<int, int> P;
typedef pair<llong, llong> LP;
typedef pair<int, P> PP;
typedef pair<llong, LP> LPP;

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


int diff(int n,int x,int y){
  int a2[n];
  int b2[n];
  int difference = 0;
  REP(i,n){
    a2[i] = x%2;
    b2[i] = y%2;
    x /= 2;
    y /= 2;
    if(a2[i]!=b2[i]){
      difference++;
    }
  }
  return difference;
}

/*int diff(int n,int a2[n],int b2[n]){
   REP(i,n){
    if(a2[i]!=b2[i]){
      difference++;
    }
  }
  return difference;
}*/

int ten(int n,int *a2){
  int ans = 0;
  REP(i,n){
    ans += pow(2,i) * a2[i];
  }
  return ans;
}

int main(){

  int n,a,b;
  cin>>n>>a>>b;
  int a2[n];
  int b2[n];
  int x = a;
  int y = b;
  int difference = 0;
  REP(i,n){
    a2[i] = x%2;
    b2[i] = y%2;
    x /= 2;
    y /= 2;
    if(a2[i]!=b2[i]){
      difference++;
    }
  }
  if(difference%2==0){
    cout<<"NO"<<endl;
    return 0;
  }
  cout<<"YES"<<endl;


  vector<int> changeable;
  REP(i,n){
    changeable.pb(i);
  }

  cout<<ten(n,a2)<<endl;
  REP(i,n-1){
    //固定するやつを決める
    int kotei;
    //differenceを調べる
    //int dif = diff(n,a2,b2);
    int p = 0;
    while(1){
      int q = changeable[p];
      if(a2[q]!=b2[q]){
        kotei = q;
        break;
      }
      p++;
    }
    int koteiNum;
    //固定する要素を外す
    REP(j,changeable.size()){
      if(changeable[j]==kotei){
        changeable.erase(changeable.begin() + j);
        break;
      }
    }
    for(int j = 1;j<pow(2,n-i-1);j++){
      int t = 0;
      while(1){
        if(j%pow(2,t+1)!=0){
          break;
        }
        t++;
      }
      if(a2[changeable[t]]==0){
        a2[changeable[t]] = 1;
      }else{
        a2[changeable[t]] = 0;
      }
      cout<<ten(n,a2)<<endl;
    }
    if(a2[kotei] = 1){
      a2[kotei] = 0;
    }else{
      a2[kotei] = 1;
    }
  }

  cout<<ten(n,b2)<<endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:110:13: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
  110 |         if(j%pow(2,t+1)!=0){
      |            ~^~~~~~~~~~~
      |            |    |
      |            int  __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

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

long long n, a, b;
int memo[20] = {0};
vector<long long> v, ls;
int d[4] = {0, 1, 1, 0};
bool ch = 0;

void solve();

int main() {
  cin >> n >> a >> b;
  for(int i = 0; i < n; ++i) memo[i] = i;
  for(int i = 0; i < n; ++i)
    if((a >> i) % 2 != (b >> i) % 2) {
      ls.push_back(i);
      if(ch) {
        cout << "NO" << endl;
        return 0;
      }
      // swap(memo[n - 1], memo[i]);
      // ch = 1;
    }
  if(!ch) {
    cout << "NO" << endl;
    return;
  }
  cout << "YES" << endl;
  solve();
  for(int i = 0; i < v.size(); ++i) {
    cout << (a ^ v[i]);
    if(i != v.size() - 1) cout << " ";
  }
  cout << endl;
  return 0;
}

void solve() {
  v.assign((1 << n), 0);
  int vsize = v.size();
  for(int i = 0; i < n; ++i) {
    int cnt = 0, now = 0, mnum = (1 << i);
    for(int j = 0; j < vsize; ++j) {
      if(d[now]) v[j] += 1 << memo[i];
      ++cnt;
      if(cnt == mnum) {
        cnt = 0;
        ++now;
        now %= 4;
      }
    }
  }
  if(ls.size() == 1) {
    for(int i = 0; vsize; ++i) {
      v[i] ^= (1 << (n - 1)) + (1 << ls[0]);
    }
    ch = 1;
    return;
  }
  for(int i = 1; i < (1 << n) - 1; ++i) {
    int now = v[i + 1] ^ v[(1 << n) - 1], cnt = 0, x = 0;
    for(int j = 0; j < n; ++j)
      if((now >> j) % 2 == 1) ++cnt;
    if(cnt > 1) continue;
    now = v[i];
    for(int j = 0; j < n; ++j)
      if((now >> j) % 2 == 1) {
        x += (1 << j);
        ++cnt;
      }
    if(ls.size() != cnt) continue;
    for(int j = 0; j < ls.size(); ++i) {
      x ^= (1 << ls[j]);
    }
    for(int j = 0; j < vsize; ++j) v[i] ^= x;
    reverse(v.begin() + i + 1, v.end());
    ch = 1;
    return;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   27 |     return;
      |     ^~~~~~
Language: C++

// グレイコード表における任意の異なるi, j bitをひっくり返したものもグレイコード．コレを使って頑張るやつっぽい．考察TLE

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: Java


import scala.Int;

import java.util.Arrays;
import java.util.Scanner;

public class Main {

    int n, a, b;

    void run() {
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        a = sc.nextInt();
        b = sc.nextInt();

        if (Integer.bitCount(a^b) % 2 == 0) {
            System.out.println("NO");
            return;
        }
        System.out.println("YES");
        boolean[] used = new boolean[1 << n];
        int[] ans = new int[1<<n];

        for (int i = 0; i < (1 << n) - 2; i++) {
            used[a] = true;
            ans[i] = a;
            boolean br = false;
            int r = 2;
            while (!br) {
                for (int j = 0; j < n; j++) {
                    int next = a ^ (1 << j);
                    if (used[next] || next == b) continue;
                    a = next;
                    br = true;
                    break;
                }
                if (!br) {
                    reverse(ans, i - (1 << r), i);
                    r += 2;
                }
            }
        }
        ans[(1 << n) - 2] = a;
        ans[(1 << n) - 1] = b;
        boolean check = true;
        for (int i = 0; i < (1 << n) - 1; i++) {
            System.out.print(ans[i] + " ");
            check &= Integer.bitCount(ans[i]^ans[i + 1]) == 1;
        }
        debug(check);
        System.out.println(b);
    }

    void reverse(int[] ar, int l, int r) {
        int c = (l + r) / 2 - l;
        for (int i = 0; i < c; i++) {
            int tmp = ar[l + i];
            ar[l + i] = ar[r - i];
            ar[r - i] = tmp;
        }
    }

    void debug(Object...os) {
        System.err.println(Arrays.deepToString(os));
    }

    public static void main(String[] args) {
        new Main().run();
    }
}


Compiler output:
Main.java:2: error: package scala does not exist
import scala.Int;
            ^
1 error
Language: C++

#include<bits/stdc++.h>
using  namespace std;
int main(){
  int n,a,b,c,d;
  cin>>n>>a>>b;
  c=a,d=b;
  bool f=false;
  for(int i=0;i<n;i++){
    if(a%2!=b%2){
      if(f){
        cout<<"NO";
        return 0;
      }else{
        f=true;
      }
    a/=2;
    b/=2;
  }
  if(!f){
    cout<<"NO";
    return 0;
  }
  cout<<"YES"<<endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:24:2: error: expected '}' at end of input
   24 | }
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^