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Cod sursa(job #404524)
#include<stdio.h>
int n,sol[100],p;
void afisare()
{
int i;
for(i=1;i<=n;++i)
printf("%d ",sol[i]);
printf("\n");
}
int valid(int p)
{
int i;
for(i=1;i<=p-1;++i)
if(sol[i]==sol[p]) return 0;
return 1;
}
void bkt(int p)
{
if(p==n+1)
{
afisare ();
return;
}
for(int i=1;i<=n;++i)
{
sol[p]=i;
if(valid(p)==1) bkt(p+1);
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
bkt(1);
return 0;
}