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Cod sursa(job #522121)
#include<fstream.h>
ifstream f("submultimi.in");
ofstream g("submultimi.out");
int n,k,x[17],s[17];
void afis()
{for(int i=1;i<=n;i++) if(x[i]) g<<i<<' ';
g<<'\n';
}
void back()
{k=1;x[k]=-1;
do{while(x[k]<1)
{x[k]++;
s[k]=s[k-1]+x[k];
if(k==n) {if(s[n]) afis();}
else {k++; x[k]=-1;}
}
k--;
}while(k);
}
int main()
{f>>n;
back();
g.close();
return 0;
}