program bt;
uses crt;
var a:array [1..100] of integer; b:array [1..100] of integer;
gioi,kha,trungbinh,yeu:integer;
TBCN:real;
begin
clrscr;
writeln('Nhap n');readln(n);
for i:=1 to n do
begin
writeln('a[',i,']=');
readln('Diem trung binh hoc ki I la',a[i]);
writeln('b[',i,']=');
readln('Diem trung binh hoc ki II la',b[i]);
end;
gioi:=0; kha:=0;
trungbinh:=0; kem:=o
for i:=1 to n do
begin
TBCN:= (a[i]+b[i]*2)/3;
if TBCN>=8.0 then Gioi:=gioi+1;
if TBCN<5 then Kem:=kem+1;
if (TBCN<8.0) and (TBCN>=6.5) then kha:=kha+1;
if (TBCN>=5) and (TBCN<6.5) then trungbinh:=trungbinh+1;
end;
writeln(Gioi,'ban hoc sinh gioi');
writeln(Kha,'ban hoc sinh kha');
writeln(Trungbinh,'ban hoc sinh trung binh');
writeln(Kem,'ban hoc sinh kem');
readln;
end.