Cod sursa(job #1645279)

Utilizator theodor1289Theodor Amariucai theodor1289 Data 10 martie 2016 11:47:30
Problema Problema Damelor Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 1.19 kb
#include <fstream>
using namespace std;
ifstream fin("damesah.in");
ofstream fout("damesah.out");
int ctr;
short n, tabla[16][16];
bool prima=1;
struct {
short c, l;
} verif[14];
short nrverif;

bool ok(short i, short j)
{
    for(int h=1;h<=nrverif;h++)
    {
        //sus
        if(verif[h].c==j)
            return 0;
        //stanga
        if(j-verif[h].c==verif[h].l-i)
            return 0;
        //dreapta
        if(verif[h].c-j==verif[h].l-i)
            return 0;
    }

    return 1;
}

void bk(int k)
{
    if(k==n+1)
    {
        if(prima)
        {
            for(int i=1;i<=nrverif;i++)
                fout<<verif[i].c<<' ';
            fout<<'\n';
            ctr++;
            prima=0;
        }
        else
            ctr++;
    }

    for(int j=1;j<=n;j++)
        if(ok(k, j))
        {
            verif[++nrverif].l=k;
            verif[nrverif].c=j;
            bk(k+1);
            verif[nrverif].l=0;
            verif[nrverif--].c=0;
        }
}

int main()
{
    fin>>n;
    for(int i=0;i<=n+1;i++)
        tabla[i][0]=tabla[i][n+1]=tabla[0][i]=tabla[n+1][i]=-1;

    bk(1);

    fout<<ctr;
    return 0;
}