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Cod sursa(job #263381)
#include<stdio.h>
int n,sol[9];
void afisare()
{
for(int i=1;i<=n;++i)
printf("%d ",sol[i]);
printf("\n");
}
char valid(int k)
{
for(int i=1;i<k;++i)
if(sol[i]==sol[k])
return 0;
return 1;
}
void back(int k)
{
if(k==n+1)
{ afisare();
return;
}
for(int i=1;i<=n;++i)
{
sol[k]=i;
if(valid(k))
back(k+1);
}
}
int main()
{
freopen("parametri.in","r",stdin);
freopen("parametri.out","w",stdout);
scanf("%d",&n);
back(1);
return 0;
}