제출 #736246

#제출 시각아이디문제언어결과실행 시간메모리
736246GrindMachine순열 (APIO22_perm)C++17
71.22 / 100
12 ms1320 KiB
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
	a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
	a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

#include "perm.h"

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<int> construct_permutation(ll k) {
	k--;

	vector<ll> groups;
	rev(bit, 59, 1) {
		ll f = (1ll << bit) - 1;
		while (k >= f) {
			k -= f;
			groups.pb(bit);
		}
	}

	assert(k == 0);

	ll sum = 0;
	trav(x, groups) sum += x;

	ll ptr = sum - 1;
	vector<int> ans;

	trav(g, groups) {
		for (int x = ptr - g + 1; x <= ptr; ++x) {
			ans.pb(x);
		}

		ptr -= g;
	}

	return ans;
}
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