#include<iostream>
#include<vector>
#include<set>
#include<algorithm>
#include<map>
#define ll long long
using namespace std;
ll a[105];
ll Ans[105];
vector<ll> Index[7];
vector<ll> Num[7];
set<ll> All;
map<vector<ll>, ll> mp;
string s;
void Binary(ll a) {
if (a > 1) Binary(a / 2);
s += a % 2 + '0';
}
int ask(ll i) {
return a[i - 1];
}
vector<ll> get_pairwise_xor(vector<ll> v) {
vector<ll> ans;
for (ll i : v) {
for (ll j : v) {
ans.push_back(a[i - 1] ^ a[j - 1]);
}
}
sort(ans.begin(), ans.end());
return ans;
}
int main() {
ll n;
cin >> n;
Ans[1] = ask(1);
Index[0].push_back(1);
for (ll i = 0; i < 7; i++) {
for (ll j = 1; j <= n; j++) {
if (((1 << i) & j) == 0)
Index[i].push_back(j);
}
}
for (ll i = 0; i < 7; i++) {
vector<ll> v, v1;
v = get_pairwise_xor(Index[i]);
Index[i].erase(Index[i].begin(), Index[i].begin() + 1);
v1 = get_pairwise_xor(Index[i]);
int j = 0;
for (ll j1 : v) {
if (v[j] == 0) {
v.erase(v.begin(), v.begin() + 1);
j--;
}
j++;
}
j = 0;
for (ll j1 : v1) {
if (v1[j] == 0) {
v1.erase(v1.begin(), v1.begin() + 1);
j--;
}
j++;
}
int k = 0;
for (ll k1 : v) {
int j = 0;
for (ll j1 : v1) {
if (v1[j] == v[k]) {
v1.erase(v1.begin() + j, v1.begin() + j + 1);
v.erase(v.begin() + k, v.begin() + k + 1);
k--;
break;
}
j++;
}
k++;
}
Num[i] = v;
int j = 0;
for (ll k : Num[i]) {
Num[i][j] ^= Ans[1];
j++;
}
}
for (ll i = 0; i < 7; i++) {
for (ll j : Num[i]) {
All.insert(j);
}
}
for (ll i = 1; i <= n; i++) {
s = "";
Binary(i);
vector<ll> v;
ll m = s.size();
for (ll j = 0; j < 7 - m; j++) {
s = '0' + s;
}
int j = 0;
for (char c : s) {
if (c == '0') v.push_back(7 - j - 1);
j += 1;
}
reverse(v.begin(), v.end());
mp[v] = i;
}
set<ll>::iterator it = All.begin();
while (it != All.end()) {
vector<ll> v;
for (ll i = 0; i < 7; i++) {
for (ll j : Num[i]) {
if (j == *it) {
v.push_back(i);
break;
}
}
}
Ans[mp[v]] = *it;
it++;
}
cout << n << endl;
for (ll i = 1; i <= n; i++) {
cout << Ans[i] << ' ';
}
}
Compilation message
Xoractive.cpp: In function 'int main()':
Xoractive.cpp:62:11: warning: unused variable 'j1' [-Wunused-variable]
62 | for (ll j1 : v) {
| ^~
Xoractive.cpp:71:11: warning: unused variable 'j1' [-Wunused-variable]
71 | for (ll j1 : v1) {
| ^~
Xoractive.cpp:82:12: warning: unused variable 'j1' [-Wunused-variable]
82 | for (ll j1 : v1) {
| ^~
Xoractive.cpp:80:11: warning: unused variable 'k1' [-Wunused-variable]
80 | for (ll k1 : v) {
| ^~
Xoractive.cpp:94:7: error: redeclaration of 'int j'
94 | int j = 0;
| ^
Xoractive.cpp:61:7: note: 'int j' previously declared here
61 | int j = 0;
| ^
Xoractive.cpp:95:11: warning: unused variable 'k' [-Wunused-variable]
95 | for (ll k : Num[i]) {
| ^
