var N,i,a,p:integer;
BEGIN
readln(N);
p:=1;
for i:=1 to N do begin
read(a);
if (a>9) and (a<100) then
p:=p*a;
end;
writeln(p);
end.
2sin x*cos x - 2√3*(cos x*cos(7pi/6) + sin x*sin(7pi/6)) = 3cos x2sin x*cos x - 2√3*(cos x*(-√3/2) + sin x*(-1/2)) = 3cos x2sin x*cos x + 2√3*√3/2*cos x + 2√3/2*sin x = 3cos x2√3*√3/2*cos x = 3cos x, их можно сократить.2sin x*cos x + √3*sin x = 0sin x*(2cos x + √3) = 01) sin x = 0; x = pi*k. На отрезке [-3pi/2; 0] будут корни x1 = -pi; x2 = 02) cos x = -√3/2; x = +-5pi/6 + 2pi*n. На отрезке [-3pi/2; 0] будет x3 = -5pi/6Ответ: x1 = -pi; x2 = 0; x3 = -5pi/6
Var
a,b,c:integer;
begin
read(a,b,c);
if a<b then a:=b;
if a>=c then writeln(a) else writeln(c);
end.