Program proizv;
uses crt;
type
   Tmatr=array[1..20,1..20] of integer;
var n,i,j,pr:integer;a:Tmatr;
procedure Prz(a:Tmatr;n:integer;var pr:integer);
begin
for j:=1 to n do
  begin
  pr:=1;
   for i:=1 to n do
     begin
       if i mod 2=0 then pr:=pr*a[i,j];
     end;
   writeln('Proizv v stb',j,'=',pr);
   end;
end;
begin
clrscr;
write('n=');readln(n);
randomize;
for i:=1 to n do
  begin
    for j:=1 to n do
      begin
        a[i,j]:=random(10)+1;
        write(a[i,j]:3);
      end;
  writeln;
  end;
readln;
Prz(a,n,pr);
readln;
end.