Cod sursa(job #2482051)

Utilizator miruna1224Floroiu Miruna miruna1224 Data 27 octombrie 2019 19:04:17
Problema Problema Damelor Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.82 kb
#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
ifstream f("damesah.in");
ofstream g("damesah.out");
int v[20],n,ok,l[20],c[20],d[50],d2[50];
long long nr=1;
void afis()
{
    for(int i=1;i<=n;i++)
        g<<v[i]<<' ';
    g<<'\n';
}
int valid(int k)
{
    if(!c[v[k]]&&!l[k]&&!d[v[k]-k+n]&&!d2[k+v[k]])
        return 1;
    return 0;
}
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)
        {
        l[pas]=c[i]=d[i-pas+n]=d2[pas+i]=1;
        bktr(pas+1);
        l[pas]=c[i]=d[i-pas+n]=d2[pas+i]=0;
        }


    }
}
int main()
{
    f>>n;
    bktr(1);
    g<<nr;
    return 0;
}