Cod sursa(job #1497400)

Utilizator marcdariaDaria Marc marcdaria Data 6 octombrie 2015 19:24:17
Problema Generare de permutari Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.59 kb
#include <iostream>
#include <fstream>
int st[100],n;
using namespace std;

ifstream f("permutari.in");
ofstream g("permutari.out");

void afisare(int p)
{
    int i;
    for(i=1;i<=p;i++)
      g<<st[i];
    g<<endl;
}

bool valid(int p)
{
    int i;
    for(i=1;i<p;i++)
      if(st[p]==st[i])
      return 0;
    return 1;
}

void back(int p)
{
    int pval;
    for(pval=1;pval<=n;pval++)
    {
        st[p]=pval;
        if(valid(p))
          if(p==n)  afisare(p);
        else back(p+1);
    }
}

int main()
{
    f>>n;
    back(1);
    return 0;
}