program tamgiac;
int a, b, c :Real;
begin
write('a='); readln(a);
write('b='); readln(b);
write('c='); readln(c);
if (a+b>c and b+c>a and a+c>b) then
write('Ba canh a,b,c là ba canh cua tam giac');
else
write('Ba cạnh khong phai ba canh cua tam giac');
end.