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Cod sursa(job #459032)
#include<stdio.h>
int n,sol[20];
bool valid(int p)
{
int i;
for(i=1;i<p;i++)
if (sol[i]==sol[p])
return 0;
return 1;
}
void afisare()
{
for(int i=1;i<=n;++i)
{
printf("%ld ",sol[i]);
}
}
void bkt(int p)
{
if (p==n+1)
{
afisare();
printf("\n");
return;
}
for(int 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("%ld",&n);
bkt(1);
}