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Cod sursa(job #501495)
#include<fstream>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int n,x[10];
void afis()
{
int i,j,max=0;
max=0;
for(i=1;i<=n;i++)
if(x[i]>max) max=x[i];
for(i=1;i<=max;i++)
{ fout<<"{";
for(j=1;j<=n;j++)
if(x[j]==i) fout<<j<<" ";
fout<<"\b} ";
}
fout<<endl;
}
void back(int k)
{
int i,max;
if(k==n+1) afis();
else
{ max=0;
for(i=1;i<=k-1;i++)
if(x[i]>max) max=x[i];
for(i=1;i<=max+1;i++)
{
x[k]=i;
back(k+1);
}
}
}
int main()
{
fin>>n;
back(1);
return 0;
}