var a:array[1..100] of integer;
i,s,n,m:integer;
BEGIN
randomize;
read(n,m);
for i := 1 to 100 do
begin
a[i]:=random(m-n) +n;
if (i mod 2 =0) and (a[i] mod 2 = 0) then s:=s+1;
end;
writeln(s);
END.
var a:array[1..100] of integer;i,s,n,m:integer;BEGIN randomize; read(n,m); for i := 1 to 100 do begin a[i]:=random(m-n) +n; if (i mod 2 =0) and (a[i] mod 2 = 0) then s:=s+1; end; writeln(s);END.
var a:array[1..100] of integer;
i,s,n,m:integer;
BEGIN
randomize;
read(n,m);
for i := 1 to 100 do
begin
a[i]:=random(m-n) +n;
if (i mod 2 =0) and (a[i] mod 2 = 0) then s:=s+1;
end;
writeln(s);
END.
var a:array[1..100] of integer;
i,s,n,m:integer;
BEGIN
randomize;
read(n,m);
for i := 1 to 100 do
begin
a[i]:=random(m-n) +n;
if (i mod 2 =0) and (a[i] mod 2 = 0) then s:=s+1;
end;
writeln(s);
END.