Submission #912366

#	Time	Username	Problem	Language	Result	Execution time	Memory
912366		huyngo	Permutation (APIO22_perm)	C++17	0 / 100	183 ms	262144 KiB

perm

#include "perm.h"

std::vector<int> construct_permutation(long long k)
{
    std::vector<int> a;
    long long l = 0, r = 0, dd = 0;
    auto work = [&](auto self, long long x) -> void {
        if (x & 1) {
            a.push_back(--l);
            dd = l;
            self(self, x - 1);
        }
        else {
            a.push_back(++r);
            self(self, x >> 1);
        }
        };
    work(work, k);
    for (auto& x : a)
        x -= (dd - 1);
    return a;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 90