Submission #916439

#	Time	Username	Problem	Language	Result	Execution time	Memory
916439		Jakub_Wozniak	Permutation (APIO22_perm)	C++17	0 / 100	0 ms	444 KiB

perm

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

vector <pair<int,int>> V;

vector<int> construct_permutation(long long n)
{
    if(n == 1)return {};
    if(n == 2)return {0};
    if(n == 3)return {1,0};
    if(n == 4)return {0,1};
    
    long long MAX = 300;
    vector <int> v;
    int B;
    int R = n%3;
    int r[200];

    
    n /= 3;
    if(R)v.push_back(R);

    while (n)
    {
        if(n < 4)
        {
            if(n < 2)break;
            if (n % 4 == 3) v.push_back(1);
            v.push_back(MAX);
            MAX--;
            break;
        }

        if (n % 4 == 1) v.push_back(1);
        if (n % 4 == 3) v.push_back(3);
        v.push_back(MAX);
        MAX--;
        if (n % 4 == 2) v.push_back(1);
        v.push_back(MAX);
        MAX--;
        n /= 4;
    }


    
    v.push_back(1);
    v.push_back(2);
    reverse(v.begin() , v.end());
    


    for(int i = 0 ; i < v.size() ; i++)
    {
        V.push_back({v[i],-i});
    }
    sort(V.begin() , V.end());

    long long akt = 0;
    for(int i = 0 ; i < V.size() ;i++)
    {
        r[-V[i].second] = akt;
        akt++;
    }


    for(int i = 0 ; i < V.size() ; i++)
    {
        v[i] = r[i]; 
    }
    V.clear();
    return v;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:52:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for(int i = 0 ; i < v.size() ; i++)
      |                     ~~^~~~~~~~~~
perm.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |     for(int i = 0 ; i < V.size() ;i++)
      |                     ~~^~~~~~~~~~
perm.cpp:66:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for(int i = 0 ; i < V.size() ; i++)
      |                     ~~^~~~~~~~~~
perm.cpp:15:9: warning: unused variable 'B' [-Wunused-variable]
   15 |     int B;
      |         ^

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