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Cod sursa(job #227228)
#include <stdio.h>
FILE *f=fopen("combinar.in","r"),*g=fopen("combinar.out","w");
int n,m,st[128];
void back(int);
void tiparire();
int ok(int);
int main()
{
fscanf(f,"%d%d",&n,&m);
back(0);
return 0;
}
void back(int k)
{
int i;
if(k==m)
tiparire();
else
for(i=1;i<=n;++i)
{
st[k]=i;
if(ok(k))
back(k+1);
}
}
int ok(int k)
{
if(k==0)
return 1;
if(st[k]>st[k-1])
return 1;
return 0;
}
void tiparire()
{
int i;
for(i=0;i<m;++i)
fprintf(g,"%d ",st[i]);
fprintf(g,"\n");
}