program z;
var x, y, w, t: real;
begin
t:=0.26;
w:=3.14;
x:=sin(w*t)/cos(w*t);
if x<0 then y:=-4 else
if (x>=0) and (x<1) then y:=(x*x+3*x+4) else
y:=sqr(x*x+3*x+4);
writeln(y);
end.
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