Python实现Pat 1006. Sign In and Sign Out (25)

小咪咪 2022-06-13 02:45 145阅读 0赞

### Pat 1006. Sign In and Sign Out (25) ###

At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. Given the records of signing in’s and out’s, you are supposed to find the ones who have unlocked and locked the door on that day.

Input Specification:

Each input file contains one test case. Each case contains the records for one day. The case starts with a positive integer M, which is the total number of records, followed by M lines, each in the format:

ID\_number Sign\_in\_time Sign\_out\_time  
where times are given in the format HH:MM:SS, and ID number is a string with no more than 15 characters.

Output Specification:

For each test case, output in one line the ID numbers of the persons who have unlocked and locked the door on that day. The two ID numbers must be separated by one space.

Note: It is guaranteed that the records are consistent. That is, the sign in time must be earlier than the sign out time for each person, and there are no two persons sign in or out at the same moment.

Sample Input:  
3  
CS301111 15:30:28 17:00:10  
SC3021234 08:00:00 11:25:25  
CS301133 21:45:00 21:58:40  
Sample Output:  
SC3021234 CS301133

### 解答 ###

定义一个类存储一个人的数据，用列表存储所有人的数据。再利用了Python的sorted函数对列表排序，其中，用cmp参数指定的函数来进行元素间的比较，

num=input()
    ids,t0s,t1s=[],[],[]
    class Person:
        def initial(self,id,t0,t1):
            self.id=id
            self.t0=t0
            self.t1=t1
    ps=[]
    for i in range(num):
        line=[x for x in raw_input().split(' ')]
        id=line[0]
        #ids.append(line[0])
        t0=[int(x) for x in line[1].split(':')]
        #t0s.append(t0)
        t1 = [int(x) for x in line[2].split(':')]
        #t1s.append(t1)
        p=Person()
        p.initial(id,t0,t1)
        ps.append(p)
    
    def TimeEarly0(m,n):
        x=m.t0
        y=n.t0
        return x[0] * 60 * 60 + x[1] * 60 + x[2] - y[0] * 60 * 60 + y[1] * 60 + y[2]
    
    def TimeEarly1(m,n):
        x=m.t1
        y=n.t1
        return x[0]*60*60+x[1]*60+x[2]-y[0]*60*60+y[1]*60+y[2]
    sps0=sorted(ps,cmp=TimeEarly0)
    sps1=sorted(ps,cmp=TimeEarly1)
    print sps0[0].id,sps1[-1].id