中科新闻网剑三采草药插件:acm题目求解
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The 30th ACM International Collegiate Programming Contest (Asia – Beijing)
hosted by Peking University
7 of 7
Problem E: Holiday Hotel
Mr. and Mrs. Smith are going to the seaside for their holiday. Before they start off, they need to
choose a hotel. They got a list of hotels from the Internet, and want to choose some candidate
hotels which are cheap and close to the seashore. A candidate hotel M meets two requirements:
1. Any hotel which is closer to the seashore than M will be more expensive than M.
2. Any hotel which is cheaper than M will be farther away from the seashore than M.
Input
There are several test cases. The first line of each test case is an integer N (1 <= N <= 10000),
which is the number of hotels. Each of the following N lines describes a hotel, containing two
integers D and C (1 <= D, C <= 10000). D means the distance from the hotel to the seashore, and
C means the cost of staying in the hotel. You can assume that there are no two hotels with the
same D and C. A test case with N = 0 ends the input, and should not be processed.
Output
For each test case, you should output one line containing an integer, which is the number of all the
candidate hotels.
Sample Input 5
300 100
100 300
400 200
200 400
100 500
0
Output for the Sample Input
2
hosted by Peking University
7 of 7
Problem E: Holiday Hotel
Mr. and Mrs. Smith are going to the seaside for their holiday. Before they start off, they need to
choose a hotel. They got a list of hotels from the Internet, and want to choose some candidate
hotels which are cheap and close to the seashore. A candidate hotel M meets two requirements:
1. Any hotel which is closer to the seashore than M will be more expensive than M.
2. Any hotel which is cheaper than M will be farther away from the seashore than M.
Input
There are several test cases. The first line of each test case is an integer N (1 <= N <= 10000),
which is the number of hotels. Each of the following N lines describes a hotel, containing two
integers D and C (1 <= D, C <= 10000). D means the distance from the hotel to the seashore, and
C means the cost of staying in the hotel. You can assume that there are no two hotels with the
same D and C. A test case with N = 0 ends the input, and should not be processed.
Output
For each test case, you should output one line containing an integer, which is the number of all the
candidate hotels.
Sample Input 5
300 100
100 300
400 200
200 400
100 500
0
Output for the Sample Input
2