a:array[1..10]of longint;
n,i,s:longint;
begin
for i:=1 to 10 do read(a[i]);
readln;
readln(n);
s:=0;
for i:=1 to 10 do
if n+30>=a[i] then s:=s+1;
writeln(s);
end.
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