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Cod sursa(job #587944)
#include<cstdio>
int n,m,st[19],ok;
int valid(int p)
{ok=1;
for(int i=1;i<=p-1;i++)
if(st[p]<=st[i]) ok=0;
return ok;
}
void tipar()
{freopen("combinari.out","w",stdout);
for(int i=1;i<=m;i++)
{printf("%d",st[i]); printf("%d"," ");}
printf("%d",'\n');
}
void back(int p)
{for(int i=1;i<=n;i++)
st[p]=i;
if(valid(p))
if(p==m) tipar();
else back(p+1);
}
int main()
{freopen("combinari.in","r",stdin);
scanf("%d%d",&n,&m);
back(1);
}