Submission #642540

#	Time	Username	Problem	Language	Result	Execution time	Memory
642540		danikoynov	Permutation (APIO22_perm)	C++17	64.62 / 100	18 ms	1148 KiB

perm

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
vector < int > construct_permutation(ll k)
{
    vector < int > v;
    k --;
    ll cur = 0, cnt = 0;
    for (ll bit = 0; bit <= 63; bit ++)
    {
        if ((k & ((ll)1 << bit)) != 0)
        {
            vector < int > d;
            for (int s = 0; s < bit; s ++)
                d.push_back(cur ++);
            cnt ++;
            for (int j = 0; j < v.size(); j ++)
                d.push_back(v[j]);
            v = d;
        }
    }

    vector < int > d;
    for (int s = 0; s < cnt; s ++)
        d.push_back(cur ++);
    reverse(d.begin(), d.end());
    for (int j = 0; j < v.size(); j ++)
        d.push_back(v[j]);
    v = d;
    /**for (int i = 0; i < v.size(); i ++)
        cout << v[i] << " ";
    cout << endl;*/
    return v;

}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(ll)':
perm.cpp:17:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |             for (int j = 0; j < v.size(); j ++)
      |                             ~~^~~~~~~~~~
perm.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for (int j = 0; j < v.size(); j ++)
      |                     ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 54.615384612 / 90