Submission #976231

#	Time	Username	Problem	Language	Result	Execution time	Memory
976231		rythm_of_knight	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	492 KiB

perm

#include "perm.h"
#include <vector>
#include <algorithm>
std::vector<int> construct_permutation(long long k) {
	#define int long long
	using namespace std;
    int temp = --k;
    vector <int> v;
    while (temp) {
        v.push_back(temp & 1);
        temp >>= 1;
    }
    int sz = v.size();
    for (int i = 0; i < sz; i++) {
        while (i > 0 && v[i - 1] == 0 && v[i] > 0) {
            v[i - 1] += 2;
            v[i]--;
            i--;
        }
    }
    int cnt = -1;
    vector <signed> ans;
    vector <signed> keyin;
    for (int i = 0; i < sz; i++) {
        vector <int> t;
        if (v[i] == 0)
            continue;
        while (--v[i]) {
            keyin.push_back(++cnt);
        }
        ans.push_back(++cnt);
    }
    reverse(keyin.begin(), keyin.end());
    for (signed &u : keyin)
        ans.push_back(u);
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 81.333333333 / 90