Submission #745132

#	Time	Username	Problem	Language	Result	Execution time	Memory
745132		Desh03	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	340 KiB

perm

#include <bits/stdc++.h>
using namespace std;

vector<int> construct_permutation(long long k) {
    int lg = 0;
    while ((1LL << (lg + 1)) <= k) ++lg;
    vector<int> ans(lg, -1), ret;
    int j = lg;
    for (int i = lg - 1; i >= 0; --i)
        if (k >> i & 1)
            ans[i] = j++;
    for (int i = 0; i < lg; i++) {
        if (ans[i] ^ -1) ret.push_back(ans[i]);
        ret.push_back(i);
    }
    return ret;
}

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