#include <bits/stdc++.h>
#include <perm.h>
using ll = long long;
//#define int ll
using namespace std;
#define sz(x) (int)(x).size()
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, l, r) for(int i = l; i >= r; i--)
#define fi first
#define se second
#define mod 998244353
#define db(x) cerr << __LINE__ << " " << #x << " " << x << "\n"
using vi = vector<int>;
using pi = pair<int, int>;
const int N = 200005;
const int inf = 3e18;
vi construct_permutation(int k){
if(k == 1) return {};
if(k == 2) return {0};
if(k == 3) return {1, 0};
auto res = construct_permutation(k / 4);
int s = sz(res);
if(k % 4 == 0){
res.push_back(s);
res.push_back(s + 1);
return res;
}
if(k % 4 == 1){
res.push_back(s);
res.push_back(s + 1);
res.push_back(-1);
for(auto x : res) x++;
return res;
}
if(k % 4 == 2){
res.push_back(s);
res.push_back(-1);
res.push_back(s + 1);
for(auto x : res) x++;
return res;
}
if(k % 4 == 3){
vi z = res;
res.push_back(s);
res.push_back(s + 1);
for(auto x : res) if(x > 1) x++;
res.push_back(2);
vi f(sz(res), 1);
int sum = 1;
foru(i, 1, sz(res) - 1){
foru(j, 0, i - 1){
if(res[j] < res[i]) f[i] += f[j];
f[i] = min(f[i], inf);
}
sum = min(sum + f[i], inf);
}
if(sum == k) return res;
for(auto x : z) x += 2;
z.push_back(s + 2);
z.push_back(1);
z.push_back(s + 3);
z.push_back(0);
return z;
}
}
/*void solve(){
int q; cin >> q;
while(q--){
int k; cin >> k;
for(auto x : construct_permutation(k)){
cout << x << " ";
}
cout << "\n";
}
}
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0);
int t = 1; // cin >> t;
while(t--){
solve();
}
}*/
Compilation message
perm.cpp:19:17: warning: overflow in conversion from 'double' to 'int' changes value from '3.0e+18' to '2147483647' [-Woverflow]
19 | const int inf = 3e18;
| ^~~~
perm.cpp: In function 'vi construct_permutation(int)':
perm.cpp:25:40: warning: control reaches end of non-void function [-Wreturn-type]
25 | auto res = construct_permutation(k / 4);
| ^
/usr/bin/ld: /tmp/cc236wSp.o: in function `main':
grader.cpp:(.text.startup+0x240): undefined reference to `construct_permutation(long long)'
collect2: error: ld returned 1 exit status
