hduoj 1077 Catching Fish 求单位圆最多覆盖点个数
Catching Fish
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 1217 Accepted Submission(s): 466
likes catching fish very much. He has a fishnet whose shape is a circle
of radius one. Now he is about to use his fishnet to catch fish. All
the fish are in the lake, and we assume all the fish will not move when
Ignatius catching them. Now Ignatius wants to know how many fish he can
catch by using his fishnet once. We assume that the fish can be regard
as a point. So now the problem is how many points can be enclosed by a
circle of radius one.
Note: If a fish is just on the border of the fishnet, it is also caught by Ignatius.
input contains several test cases. The first line of the input is a
single integer T which is the number of test cases. T test cases follow.
Each
test case starts with a positive integer N(1<=N<=300) which
indicate the number of fish in the lake. Then N lines follow. Each line
contains two floating-point number X and Y (0.0<=X,Y<=10.0). You
may assume no two fish will at the same point, and no two fish are
closer than 0.0001, no two fish in a test case are approximately at a
distance of 2.0. In other words, if the distance between the fish and
the centre of the fishnet is smaller 1.0001, we say the fish is also
caught.
3
6.47634 7.69628
5.16828 4.79915
6.69533 6.20378
6
7.15296 4.08328
6.50827 2.69466
5.91219 3.86661
5.29853 4.16097
6.10838 3.46039
6.34060 2.41599
8
7.90650 4.01746
4.10998 4.18354
4.67289 4.01887
6.33885 4.28388
4.98106 3.82728
5.12379 5.16473
7.84664 4.67693
4.02776 3.87990
20
6.65128 5.47490
6.42743 6.26189
6.35864 4.61611
6.59020 4.54228
4.43967 5.70059
4.38226 5.70536
5.50755 6.18163
7.41971 6.13668
6.71936 3.04496
5.61832 4.23857
5.99424 4.29328
5.60961 4.32998
6.82242 5.79683
5.44693 3.82724
6.70906 3.65736
7.89087 5.68000
6.23300 4.59530
5.92401 4.92329
6.24168 3.81389
6.22671 3.62210
5
5
11
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