var a,b,c:integer;
begin
write('a = ');readln(a);
write('b = ');readln(b);
write('c = ');readln(c);
if (a+b>c) and (a+c>b) and (b+c>a) then
write('ba so do co the la do dai ba canh cua tam giac')
else write('ba so do khong the la do dai ba canh cua tam giac');
readln
end.