HDUOJ1234开门人和关门人开门人和关门人
开门人和关门人Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7168Accepted Submission(s): 3667Problem Description每天第一个到机房的人要把门打开，最后一个离开的...
