Var a: array [1..20] of integer; i,s:integer;
Begin
For i:=1 to 20 do begin
read(a[i]); s:=s+a[i];
end;
Writeln(s/20);
readln;
end.
Var a: array [1..20] of integer; i,s:integer;
Begin
For i:=1 to 20 do begin
read(a[i]); s:=s+a[i];
end;
Writeln(s/20);
readln;
end.