區間重疊問題 (貪心)
阿新 • • 發佈:2019-01-09
Figure A Sample Input of Radar Installations
Input The input consists of several test cases. The first line of each case contains two integers n (1<=n<=1000) and d, where n is the number of islands in the sea and d is the distance of coverage of the radar installation. This is followed by n lines each containing two integers representing the coordinate of the position of each island. Then a blank line follows to separate the cases.
The input is terminated by a line containing pair of zeros
Output For each test case output one line consisting of the test case number followed by the minimal number of radar installations needed. "-1" installation means no solution for that case. Sample Input
3 2 1 2 -3 1 2 1 1 2 0 2 0 0
Case 1: 2 Case 2: 1