Cod sursa(job #2253520)

Utilizator AmaliaPostolacheAmalia Postolache AmaliaPostolache Data 4 octombrie 2018 09:21:44
Problema Problema Damelor Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.91 kb
#include <bits/stdc++.h>

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

int st[25], n;
int viz[25], dp[50], ds[50];
int C;

void Afisare()
{
    C++;
    if (C==1)
    {
        for (int i=1;i<=n;i++)
            fout<<st[i]<<"  ";
        fout<<"\n";
    }
}

inline int Valid(int i, int j)
{
    if (viz[j]==1) return 0;
    if (dp[n-j+i]==1) return 0;
    if (ds[i+j-1]==1) return 0;
    return 1;
}

void Back(int top)
{
    if (top==n+1) Afisare();
    else for (int j=1;j<=n;j++)
            if (Valid(top,j))
            {
                st[top]=j;
                viz[j]=1;
                dp[n-j+top]=1;
                ds[top+j-1]=1;
                Back(top+1);
                viz[j]=0;
                dp[n-j+top]=0;
                ds[top+j-1]=0;
            }
}

int main()
{   fin>>n;
    Back(1);
    fout<<C;
    return 0;
}