737 . Gopher II
Description
The gopher family, having averted the canine threat, must face a new
predator.
The are n gophers and m gopher holes, each at distinct
(x, y) coordinates. A hawk arrives and if a gopher does not reach a
hole in s seconds it is vulnerable to being eaten. A hole can
save at most one gopher. All the gophers run at the same velocity v.
The gopher family needs an escape strategy that minimizes the number of
vulnerable gophers.
Input Format
The input contains several cases.
The first line of each case contains four positive integers less than 100:
n, m, s, and v. The next n lines
give the coordinates of the gophers; the following m lines
give the coordinates of the gopher holes. All distances are in metres;
all times are in seconds; all velocities are in metres per second.
Output Format
Output consists of a single line for each case, giving the number of vulnerable
gophers.
Sample Input 1
2 2 5 10
1.0 1.0
2.0 2.0
100.0 100.0
20.0 20.0
Sample Output 1
Hints
Problem Source
Migrated from old NTUJ.
UVA 10080
Subtasks
| No. | Testdata Range | Score |
|---|