Submission #573143

#	Time	Username	Problem	Language	Result	Execution time	Memory
573143		dqhungdl	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	352 KiB

perm

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

int getBit(long long x, int k) {
    return (x >> k) & 1LL;
}

vector<int> construct_permutation(long long k) {
    if (!k)
        return {};
    int last = 0;
    for (int i = 0; i <= 60; i++)
        if (getBit(k, i))
            last = i;
    vector<int> rs(last);
    iota(rs.begin(), rs.end(), 0);
    for (int i = last - 1; i >= 0; i--)
        if (getBit(k, i)) {
            for (int j = i; j < rs.size(); j++)
                rs[j]++;
            rs.push_back(i);
        }
//    for (int x: rs)
//        cout << x << ' ';
//    cout << '\n';
    return rs;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:20:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |             for (int j = i; j < rs.size(); j++)
      |                             ~~^~~~~~~~~~~

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