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Cod sursa(job #179920)
#include<fstream.h>
#include<iostream.h>
int main()
{
int n,m,k,i,x[19],j;
fstream f,g;
f.open("Combinari.in",ios::in);
f>>n>>k;
f.close();
g.open("Combinari.out",ios::out);
for(i=k+1;i<=n;i++)
x[i]=0;
for(i=1;i<=k;i++)
x[i]=i;
for(i=1;i<=n;i++)
if(x[i]>0)
g<<i<<" ";
g<<"\n";
for(j=n-1;j>=1;j--)
if(x[j]>0&&x[j+1]==0)
{
x[j+1]=x[j];
x[j]=0;
for(i=j+2;i<=n;i++)
x[i]=0;
for(i=1;i<=k-x[j+1];i++)
x[j+1+i]=x[j]+i;
for(i=1;i<=n;i++)
if(x[i]>0)
g<<i<<" ";
g<<"\n";
j=n;
}
g.close();
return 0;
}