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Cod sursa(job #800962)
//combinari
#include<fstream>
using namespace std;
ifstream f("combinari.in");
ofstream o("combinari.out");
int n,k,x[20],i;
void initialize()
{
x[i]=0;
}
int getnumber()
{
if(x[i]<n)
{
x[i]++;
return 1;
}
return 0;
}
int valid()
{
if(i>1)
{
if(!(x[i]>x[i-1]))
{
return 0;
}
}
return 1;
}
int solutie()
{
if(i==k)
return 1;
return 0;
}
void scrie()
{
for(int i=1;i<=k;i++)
o<<x[i]<<' ';
o<<endl;
}
void back()
{
int a;
i=1;
while(i)
{
do{}while((a=getnumber())&&!valid());
if(a)
{
if(solutie())
scrie();
else
{
i++;
initialize();
}
}
else
i--;
}
}
int main()
{
f>>n>>k;
back();
f.close();
o.close();
return 0;
}