| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1277044 | al95ireyiz | Permutation (APIO22_perm) | C++20 | 0 ms | 0 KiB |
#pragma GCC optimize("O3", "fast-math", "unroll-loops", "no-stack-protector")
#include <bits/stdc++.h>
using namespace std;
#if !defined(ONLINE_JUDGE) and !defined(EVAL)
#include "template/debug.h"
#else
#define d(x...)
#endif
#define fr first
#define er erase
#define in insert
#define sc second
#define ll long long
#define pb push_back
#define vll vector<ll>
#define pll pair<ll,ll>
#define len(x) (ll) x.size()
#define all(x) x.begin(),x.end()
const ll INF = 1e9, INFL = 1e18;
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ll maxn = 2e5 + 5;
ll n, m, k = 0;
std::vector<int> construct_permutation(long long _k)
{
m = _k;
vector<int> v, cv;
if(__builtin_popcount(m) == 1){
for(ll i = 1; (1LL << i) <= m; i ++){
cv.pb(i - 1);
}
return cv;
}
m --; // bos coxluq
ll cm = 0;
while(m){
ll l = 1, r = INF, cv;
while(l <= r){
ll md = (l + r) >> 1;
if(md * (md + 1) / 2 <= m){
cv = md, l = md + 1;
}
else{
r = md - 1;
}
}
v.pb(cv);
m -= cv * (cv + 1) / 2;
cm += cv;
}
for(auto i : v){
for(ll j = cm - i + 1; j <= cm; j ++){
// cout << j << ' ';
cv.pb(j - 1);
}
cm -= i;
}
return cv;
}
void _() {
ll q;
cin >> q;
auto v = construct_permutation(q);
for(auto i : v) cout << i << ' ' ;
}
signed main() {
ll tm = clock();
cin.tie(0)->sync_with_stdio(0);
ll t = 1;
// cin >> t;
for(ll tt = 1; tt <= t; tt ++) _();
cerr << "\n\033[1;31mTime: \033[1;30m" \
<< (double)(clock()-tm)/1000000 << "\033[1;32m seconds\n";
}