var i,j:integer;
begin
for i:=0 to 3 do
begin
for j:=i to 2 do write (' ');
write('/');
for j:=1 to i do write (' ');
write('\');
writeln;
end ;
for i:=0 to 3 do
begin
for j:=1 to i do write (' ');
write('\');
for j:=i to 2 do write (' ');
write('/');
writeln;
end ;
end.
Program abc;
var a, b, c: integer;
begin
a:=15;
b:=50;
c:=35;
write(a+b+c, 'Всего учеников');
end.