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Cod sursa(job #678408)
#include <stdio.h>
using namespace std;
int n,k,st[19];
bool verif(int p)
{
for (int i=1;i<p;i++)
for(int j=i+1;j<=p;j++)
if (st[i]==st[j])
return false;
return true;
}
void afis()
{
for(int i=1;i<=n;i++)
printf("%d ",st[i]);
printf("\n");
}
void back(int p)
{
for(int i=1;i<=n;i++)
{
st[p]=i;
if(verif(p))
if(p==n)
afis();
else
back(p+1);
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d %d",&n);
back(1);
return 0;
}