http://acm.hdu.edu.cn/showproblem.php?pid=1255 覆盖的面积 Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 2933 Accepted Submission(s): 1447 Problem Description 给定平面上若干矩形,求出被这些矩形覆盖过至少两次的区域的面积. …
Jack knows that there is a great underground treasury in a secret region. And he has a special device that can be used to detect treasury under the surface of the earth. One day he got outside with the device to ascertain the treasury. He chose many…