Cod sursa(job #2302368)

Utilizator NicusorTelescu Nicolae Nicusor Data 14 decembrie 2018 15:10:01
Problema Dusman Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.14 kb
#include <cstdio>

using namespace std;

int dusmani[1001][3], nrSolutie, v[1001], folositi[1001];

void backtracking(int nivel, int n, int k, FILE* out)
{
    if (nivel == n + 1)
    {
        nrSolutie++;
        if (nrSolutie == k)
            for (int i = 1 ; i <= n ; i++)
            {
                fprintf(out,"%d ",v[i]);
            }
    }
    else
    {
        for (int i = 1 ; i <= n ; i++)
        {
            if (folositi[i] == 0 && dusmani[v[nivel - 1]][1] != i && dusmani[v[nivel - 1]][2] != i)
            {
                folositi[i] = 1;
                v[nivel] = i;
                backtracking(nivel + 1,n,k,out);
                folositi[i] = 0;
                v[nivel] = 0;
            }
        }
    }
}

int main()
{
    FILE* in = fopen("dusman.in","r");
    FILE* out = fopen("dusman.out","w");

    int n(0), k(0), m(0);
    fscanf(in,"%d %d %d",&n,&k,&m);

    for (int i = 1 ; i <= m ; i++)
    {
        int a(0), b(0);
        fscanf(in,"%d %d",&a,&b);

        dusmani[a][++dusmani[a][0]] = b;
        dusmani[b][++dusmani[b][0]] = a;
    }
    backtracking(1,n,k,out);
}