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Cod sursa(job #256213)
#include <stdio.h>
int st[10], k, j, n;
void tip(void)
{
for (j=1;j<=n;j++)
printf("%d ", st[j]);
printf("\n");
}
int valid(int k)
{
for (j=1;j<k;j++)
if (st[j]==st[k])
return 0;
return 1;
}
void back(int k)
{
for (register int i=1;i<=n;i++)
{
st[k]=i;
if (valid (k))
if (k==n)
tip();
else
back(k+1);
}
}
int main(void)
{
freopen ("permutari.in", "r", stdin);
freopen ("permutari.out", "w", stdout);
scanf ("%d", &n);
back(1);
return 0;
}