Cod sursa(job #2302383)

Utilizator AcuasPopescu Nicolae-Aurelian Acuas Data 14 decembrie 2018 15:40:36
Problema Dusman Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.33 kb
#include <iostream>
#include <vector>
#include <fstream>
using namespace std;

ofstream fout("dusman.out");
vector<int> ans;
int cnt, k;

void back(int poz, int n, int v[], int **mat) {
    if (poz == n + 1) {
        ++cnt;
        if (cnt == k) {
            for (int i = 0; i < ans.size(); ++i) {
                fout << ans[i] << ' ';
            }
            fout << '\n';
            exit(0);
        }
        return ;
    }
    for (int i = 1; i <= n; ++i) {
        if (ans.size() == 0 && v[i] == 0) {
            ans.push_back(i);
            v[i] = 1;
            back(poz + 1, n, v, mat);
            ans.pop_back();
            v[i] = 0;
        }
        else if (v[i] == 0 && ans.size() > 0 && mat[ans.back()][i] == 0) {
            ans.push_back(i);
            v[i] = 1;
            back(poz + 1, n, v, mat);
            ans.pop_back();
            v[i] = 0;
        }
    }
}

int main() {
    int n, i, j, m;
    ifstream fin("dusman.in");
    fin >> n >> k >> m;
    int ** mat = new int*[n + 1];
    int *v = new int[n + 1];
    for (i = 0; i <= n; ++i) {
        v[i] = 0;
        mat[i] = new int[n + 1];
        for (j = 0; j <= n; ++j) {
            mat[i][j] = 0;
        }
    }

    for (i = 1; i <= m; ++i) {
        int x, y;
        fin >> x >> y;
        mat[x][y] = mat[y][x] = 1;
    }

    back(1, n, v, mat);
    return 0;
}