Cod sursa(job #1093798)

Utilizator geniucosOncescu Costin geniucos Data 28 ianuarie 2014 17:03:45
Problema Problema Damelor Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 0.79 kb
#include<cstdio>
using namespace std;
int sol,i,n,v[15],ap[15];
int mod(int x)
{
    if(x<0) return -x;
    return x;
}
bool valid(int poz)
{
    int i;
    for(i=1;i<poz;i++)
        if(mod(i-poz)==mod(v[i]-v[poz])) return 0;
    return 1;
}
void back(int poz)
{
    if(poz==n+1)
    {
        sol++;
        if(sol==1)
        {
            for(i=1;i<=n;i++)
                printf("%d ",v[i]);
            printf("\n");
        }
        return ;
    }
    for(int i=1;i<=n;i++)
        if(ap[i]==0)
        {
            ap[i]=1;
            v[poz]=i;
            if(valid(poz)) back(poz+1);
            ap[i]=0;
        }
}
int main()
{
freopen("damesah.in","r",stdin);
freopen("damesah.out","w",stdout);
scanf("%d",&n);
back(1);
printf("%d\n",sol);
return 0;
}