Cod sursa(job #1343306)

Utilizator AndreiBadeciAndrei Badeci AndreiBadeci Data 15 februarie 2015 11:36:15
Problema Problema Damelor Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 0.78 kb
#include <fstream>
#include <cmath>
using namespace std;

ifstream fin("damesah.in");
ofstream fout("damesah.out");

int sol[15],nsol,n,afis[15];

bool valid(int k)
{
    int i;
    for(i=1;i<k;i++)
    {
        if(sol[i]==sol[k])
            return 0;
        if(k-i==abs(sol[k]-sol[i]))
            return 0;
    }
    return 1;
}

void back(int k)
{
    if(k==n+1)
    {
        nsol++;
        if(nsol==1)
            for(int i=1;i<=n;i++)
                afis[i]=sol[i];
        return;
    }
    for(int i=1;i<=n;i++)
    {
        sol[k]=i;
        if(valid(k))
            back(k+1);
    }

}

int main()
{
    fin>>n;
    back(1);
    for(int i=1;i<=n;i++)
        fout<<afis[i]<<' ';
    fout<<'\n';
    fout<<nsol;
    return 0;
}