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Cod sursa(job #439217)
#include <fstream>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int n, m;
int x[20];
void Write(int k);
void Back( int k );
void Back( int k)
{
if ( k == n+1 )
{
return;
}
for ( int i = 1 + x[k-1]; i <= n; ++i )
{
x[k] = i;
Write(k);
Back ( k + 1);
}
}
void Write(int k )
{
for ( int i = 1; i <= k; i++)
fout << x[i] << ' ';
fout << '\n';
}
int main()
{
fin >> n;
Back(1);
fin.close();
fout.close();
return 0;
}