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Cod sursa(job #651765)
#include <stdio.h>
int n,sol[10];
void afisare()
{
int i;
for(i=1;i<=n;i++)
printf("%d ",sol[i]);
printf("\n");
}
bool valid(int h)
{
int i;
for(i=1;i<h;i++)
if(sol[h]==sol[i]) return false;
return true;
}
void bkt(int p)
{
int i;
if(p-1==n)
{
afisare();
return ;
}
for(i=1;i<=n;i++)
{
sol[p]=i;
if(valid(p)) bkt(p+1);
}
}
int main()
{
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
bkt(1);
return 0;
}