Cod sursa(job #2898475)

Utilizator DafinaTrufasTrufas Dafina DafinaTrufas Data 6 mai 2022 22:00:01
Problema Planeta Scor 30
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.96 kb
#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>

using namespace std;
int n, k;
vector<int> p(100000);

int verif_preord(int st, int dr)
{
    int i;
    if(st >= dr) return 1;
    int ok = 1;
    i = st + 1;
    while(i <= dr && p[i] <= p[st])
        i++;
    while(i <= dr)
        if(p[i] < p[st]) return 0;
        else i++;
    return verif_preord(st + 1, i - 1) * verif_preord(i, dr);
}

int main()
{ifstream f("planeta.in");
ofstream g("planeta.out");
f >> n >> k;
p = vector<int>(n);
int i;
for(i = 1; i <= n; i++)
    p[i - 1] = i;
///permutarea identica va reprezenta intotdeauna o posibila parcurgere in preordine
///de aceea, initializez contorul cu 1
int nr = 1;
while(next_permutation(p.begin(), p.end()))
    if(verif_preord(0, n - 1))
    {
        nr++;
        if(nr == k)
            for(i = 0; i < n; i++)
                g << p[i] << ' ';
    }
f.close();
g.close();
return 0;
}