Cod sursa(job #3313782)

Utilizator Alexandra282Calin Maria Alexandra Alexandra282 Data 6 octombrie 2025 16:45:54
Problema Problema Damelor Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.08 kb
#include <iostream>
#include <fstream>
using namespace std;
const int NMAX=13;
ifstream f("damesah.in");
ofstream g("damesah.out");
int N,x[NMAX+1],nrsol;
bool C[NMAX+1],dP[2*NMAX],dS[2*NMAX];
void afis()
{
    for(int i=1;i<=N;i++)
        g<<x[i]<<' ';
    g<<'\n';
}
inline bool valid(int k)
{
    return C[x[k]]==0&&dP[N-k+x[k]]==0&&dS[k+x[k]-1]==0;
}
void backt()
{
    int k=1;
    x[1]=0;
    while(k>0)
    {
        if(x[k]<N)
        {
            x[k]++;
            if(valid(k))
            {
                C[x[k]]=dP[N-k+x[k]]=dS[k+x[k]-1]=1;
                if(k==N)
                {
                    if(nrsol==0)
                        afis();
                    nrsol++;
                    C[x[k]]=dP[N-k+x[k]]=dS[k+x[k]-1]=0;
                }
                else
                    x[++k]=0;
            }
        }
        else
        {
            k--;
            C[x[k]]=dP[N-k+x[k]]=dS[k+x[k]-1]=0;
        }
    }
}
int main()
{
    f>>N;
    backt();
    g<<nrsol;
    f.close();
    g.close();
    return 0;
}