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Cod sursa(job #630119)
#include<cstdio>
#include<vector>
using namespace std;
int n,a[17];
int verificare(int k)
{
int i;
for(i=1;i<k;i++) if(a[k]==a[i]||a[i]>=a[k]) return 0;
return 1;
}
void afisare(int k)
{
int i;
for(i=1;i<=k;i++) printf("%d ",a[i]);
printf("\n");
}
void back(int k)
{
int i;
for(i=1;i<=n;i++)
{
a[k]=i;
if(verificare(k)==1)
{
afisare(k);
if(k<n) back(k+1);
}
}
}
int main()
{
freopen("submultimi.in","r",stdin);
freopen("submultimi.out","w",stdout);
scanf("%d",&n);
back(1);
return 0;
}