Вбейте в паскаль или турбо паскаль , проверьте пж. program ideone;
function ctg(x: extended):extended;
begin
ctg := cos(x)/sin(x);
end;
var i, count : integer;
x : extended;
begin
count := 0;
x := 1;
for i:=0 to 2018 do begin
if ctg(x)<0 then Inc(count);
x := x * 10;
end;
WriteLn(count)
end.
function ctg(x: extended):extended;
begin
ctg := cos(x)/sin(x);
end;
var i, count : integer;
x : extended;
begin
count := 0;
x := 1;
for i:=0 to 2018 do begin
if ctg(x)<0 then Inc(count);
x := x * 10;
end;
WriteLn(count)
end.
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