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Cod sursa(job #281505)
#include<stdio.h>
int st[100],n;
void tipar()
{
int i;
for(i=1; i<=n; i++) printf("%d ",st[i]);
printf("\n");
}
int verif(int k)
{
int i;
for(i=1; i<k; i++)
if(st[i]==st[k]) return 0;
return 1;
}
void back(int k)
{
if(k==n+1) tipar();
else
{
int i;
for(i=1; i<=n; i++)
{
st[k]=i;
if(verif(k)) back(k+1);
}
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
back(1);
return 0;
}