/* check whether the value t is in a given range.
examples: 3 is in range 1-10: true
7 is in range 2-4,6,8-10: false
9 is in range 1,2,3-12: true
*/
/* check whether the value t is in a given range.
examples: 3 is in range 1-10: true
7 is in range 2-4,6,8-10: false
9 is in range 1,2,3-12: true
*/