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Cod sursa(job #654890)
# include <fstream>
using namespace std;
int st[100],i,j,m,n;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
void afisare(int p)
{
int i;
for(i=1;i<=p;i++)
g<<st[i]<<" ";
g<<"\n";
}
int valid(int p)
{
for(i=1;i<=p-1;i++)
if(st[i]==st[p]) return 0;
return 1;
}
void back(int p)
{int pval;
for(pval=1;pval<=n;pval++)
{
st[p]=pval;
if(valid(p))
if(p==n)
afisare(p);
else back(p+1);
}
}
int main()
{
f>>n;
back(1);
system("pause");
return 0;
}