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Cod sursa(job #792635)
#include <fstream>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int a[100];
bool b[100];
void afis(int k)
{
for(int i=1;i<=k;i++)
fout<<a[i]<<" ";
fout<<'\n';
}
int n;
void back(int k)
{
if(k<n+1)
{
for(int i=1;i<=n;i++)
{
if(!b[i] && i>a[k-1])
{
a[k]=i;
afis(k);
b[i]=1;
back(k+1);
b[i]=0;
}
}
}
}
int main()
{
fin>>n;
back(1);
fin.close();
fout.close();
return 0;
}