var
i,t,y:integer;
a:array[1..12]of integer;
begin
t:=0;
y:=0;
for i:=1 to 12 do
begin
readln(a[i]);
a[i]:=300-a[i]+y;
if a[i]<0 then begin writeln(-i); halt; end;
if a[i]>=100 then begin t:=t+(a[i] div 100); y:=a[i] mod 100; end;
end;
writeln(t*120+y);
end.
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