Cod sursa(job #1936981)

Utilizator vladmarinescu19Vlad Marinescu Marian vladmarinescu19 Data 23 martie 2017 16:37:31
Problema Problema Damelor Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 0.81 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("damesah.in");
ofstream g("damesah.out");
int x[15],n,nrsol;
int cont(int k)
{
    int i;
    for(i=1;i<k;i++)
    {
        if(x[k]==x[i])
            return 0;
        if(k-i==fabs(x[k]-x[i]))
            return 0;
    }
    return 1;
}
int ok=1;
void backtr(int k)
{
    int i;
    if(k>n)
    {
        nrsol++;
        if(nrsol==1)
        {
            int i,j;
            for(i=1;i<=n;i++)
                for(j=1;j<=n;j++)
                    if(j==x[i])
                        g<<j<<" ";
            g<<'\n';
        }
    }
    else
        for(i=1;i<=n;i++)
        {
            x[k]=i;
            if(cont(k))
                backtr(k+1);
        }
}
int main()
{
f>>n;
backtr(1);
g<<nrsol;
    return 0;
}