{
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}
program Hello;
uses crt;
var i : integer;
b : array [1..15] of integer;
s : integer;
begin
randomize;
s := 0;
for i := 1 to 15 do
begin
b[i] := random(41)-20;
writeln('B[',i,'] = ',b[i]);
if (b[i] < 0) then s:=s+b[i];
end;
writeln('S=',s);
end.