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Cod sursa(job #613961)
#include<cstdio>
int n,sol[20];
bool valid(int p)
{
for(int i=1;i<p;i++)
if(sol[p]==sol[i])
return false;
return true;
}
void afisare()
{
for(int i=1;i<=n;i++)
printf("%d ",sol[i]);
printf("\n");
}
void bkt(int p)
{
if(p-1==n)
{
afisare(); return;
}
else
{
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("%d",&n);
bkt(1);
return 0;
}