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Cod sursa(job #220238)
#include<stdio.h>
#include<math.h>
int n,st[10];
int valid(int k)
{
int i;
for(i=1;i<k;i++)
if(st[k]==st[i])
return 0;
return 1;
}
void tipar()
{
int i;
for(i=1;i<=n;i++)
printf("%d ", st[i]);
printf("\n");
}
void bkt(int k)
{
int i;
if(k==n+1)
{
tipar();
return;
}
for(i=1;i<=n;i++)
{
st[k]=i;
if(valid(k))
bkt(k+1);
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d", &n);
bkt(1);
return 0;
}