Cod sursa(job #1570136)
Utilizator | Andrei Sas-Miresan andrei-sas | Data | 16 ianuarie 2016 11:06:25 |
---|---|---|---|
Problema | Generare de permutari | Scor | 20 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.68 kb |
#include <fstream>
using namespace std;
ifstream f("permutari.in");
ofstream g("permutari.out");
const int maxm=20;
int n,per[maxm];
bool valid(int val, int k)
{
for(int i=1;i<=k;++i)
{
if(per[i]==val)
return false;
}
return true;
}
void afisare()
{
for(int i=1;i<=n;++i)
g<<per[i]<<' ';
g<<'\n';
}
void back(int k)
{
if(k==n+1)
{
afisare();
return;
}
for(int i=1;i<=n;++i)
{
if(valid(i,k))
{
per[k]=i;
back(k+1);
}
}
}
int main()
{
f>>n;
back(1);
f.close();
g.close();
return 0;
}