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Cod sursa(job #381410)
#include<stdio.h>
using namespace std;
#define DIM 19
#include<string.h>
int i,k,v[DIM],as,ev,n,K;
FILE *f=fopen("combinari.in","r"), *g=fopen("combinari.out","w");
void init()
{
v[k]=v[k-1];
}
int succesor()
{
v[k]=v[k]+1;
if(v[k]<=n)
return 1;
else return 0;
}
int valid()
{
return 1;
}
int solutie()
{
if(k==K)
return 1;
else return 0;
}
void afisare()
{
for(i=1;i<=k;i++)
fprintf(g,"%d ",v[i]);
fprintf(g,"\n");
}
void bt()
{
k=1;
init();
as=1; ev=0;
while(k>0)
{
as=1; ev=0;
while(as&&!ev)
{
as=succesor();
if(as)
ev=valid();
}
if(as)
{
if(solutie())
afisare();
else {k++; init();}
}
else k--;
}
}
int main()
{
fscanf(f,"%d %d",&n,&K);
bt();
fclose(f);
fclose(g);
return 0;
}