interval.in

ACM国际大学生程序设计竞赛(英文全称:ACM International Collegiate Programming Contest（ACM-ICPC或ICPC）是由美国计算机协会（ACM）主办的

-[-3,5] - [2,3]
[3,5]  + [-10,1]  * [2,3]
[3,5]  -[-10,1] - [1,10]
[3,5] *  [-10,1] + [1,2]
(([3,5] / [-10,-0.1])    /    -   [2,2]) + [10,20]