Cod sursa(job #1850701)

Utilizator ggaaggaabbiigoteciuc gabriel ggaaggaabbii Data 18 ianuarie 2017 20:39:49
Problema Problema Damelor Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 0.71 kb
#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
ifstream f("damesah.in");
ofstream g("damesah.out");
int v[20],n,ok;
long long nr=1;
void afis()
{
    for(int i=1;i<=n;i++)
        g<<v[i]<<' ';
    g<<'\n';
}
int valid(int k)
{
    for(int i=1;i<k;i++)
        if(v[i]==v[k]||k-i==abs(v[k]-v[i]))
        return 0;
    return 1;
}
void bktr(int pas)
{
    if(pas==n+1)
    {
        if(ok==0)
        {
        afis();
        ok=1;
        }
        else
        nr++;
    }
    for(int i=1;i<=n;i++)
    {
        v[pas]=i;
        if(valid(pas)==1)
            bktr(pas+1);
    }
}
int main()
{
    f>>n;
    bktr(1);
    g<<nr;
    return 0;
}