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Cod sursa(job #423490)
type
vect=array[1..18] of integer;
var
a:vect;
n,k:1..18;
f:text;
g:text;
procedure init;
var
i:integer;
begin
assign(f,'combinari.in');
reset(f);
readln(f,n,k);
for i:=1 to n do
a[i]:=0;
close(f);
end;
procedure tipar(p:integer);
var
i:integer;
begin
for i:=1 to p do
write(g,a[i],' ');
writeln(g);
end;
function valid(p:integer):boolean;
var
i:integer;
posibil:boolean;
begin
posibil:=true;
for i:=1 to p-1 do
if a[i]>=a[p] then
posibil:=false;
valid:=posibil;
end;
procedure back(p:integer);
var
val:integer;
begin
for val:=1 to n do
begin
a[p]:=val;
if valid(p) then
if p=k then
tipar(p)
else
back(p+1);
end;
end;
begin
assign(g,'combinari.out');
rewrite(g);
init;
back(1);
close(g);
end.