A - Wireless Network POJ - 2236-kuangbin带你飞
标签：getc network getchar bin scanf The cat cst body
A - Wireless Network
POJ - 2236
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Time Limit: 10000MS |
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Memory Limit: 65536K |
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Total Submissions: 50348 |
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Accepted: 20619 |
Description
An earthquake takes place in Southeast Asia. The ACM (Asia Cooperated Medical team) have set up a wireless network with the lap computers, but an unexpected aftershock attacked, all computers in the network were all broken. The computers are repaired one by one, and the network gradually began to work again. Because of the hardware restricts, each computer can only directly communicate with the computers that are not farther than d meters from it. But every computer can be regarded as the intermediary of the communication between two other computers, that is to say computer A and computer B can communicate if computer A and computer B can communicate directly or there is a computer C that can communicate with both A and B.
In the process of repairing the network, workers can take two kinds
of operations at every moment, repairing a computer, or testing if two
computers can communicate. Your job is to answer all the testing
operations.
Input
The
first line contains two integers N and d (1 1. "O p" (1 2. "S p q" (1
The input will not exceed 300000 lines.
Output
For each Testing operation, print "SUCCESS" if the two computers can communicate, or "FAIL" if not.
Sample Input
4 1
0 1
0 2
0 3
0 4
O 1
O 2
O 4
S 1 4
O 3
S 1 4
Sample Output
FAIL
SUCCESS
Source
POJ Monthly,HQM
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题意
有n个坏掉的卫星，每次操作‘O’可以修好一个，如果卫星之间都是‘修好的’状态且间距小于‘d‘，就可以通讯。
思路
并查集的时候判断一下两卫星之间距离即可。
CODE
1 #include 2 #include 3 #include
4 #include 5 #include 6
7 #define dbg(x) cout 8
9 using namespace std;
10 const int maxn = 1007;
11
12 int fa[maxn], dis[maxn];
13 int n,m,ans,cnt;
14 int d;
15 int canuse[maxn];
16
17 struct node {
18 int x, y;
19 }a[maxn];
20
21 void init()
22 {
23 for(int i = 1; i ) {
24 fa[i] = i;
25 }
26 }
27
28 double cal(node a, node b) {
29 return sqrt((a.x - b.x)*(a.x - b.x) + (a.y - b.y) * (a.y - b.y));
30 }
31
32 int fid(int x)
33 {
34 int r = x;
35 while(fa[r] != r) {
36 //if(cal(a[fa[r]],a[r])
37 r = fa[r];
38 }
39 int i,j;///路径压缩
40 i = x;
41 while(fa[i] != r) {
42 //if(cal(a[fa[i]],a[r])
43 j = fa[i];
44 fa[i] = r;
45 i = j;
46
47 }
48 return r;
49 }
50
51 void join(int r1, int r2)///合并
52 {
53 int fidroot1 = fid(r1), fidroot2 = fid(r2);
54 if(fidroot1 != fidroot2) {
55 fa[fidroot2] = fidroot1;
56 }
57 }
58
59 int main()
60 {
61 scanf("%d %d",&n, &d);
62 init();
63 for(int i = 1; i i) {
64 scanf("%d %d",&a[i].x, &a[i].y);
65 }
66 getchar();
67 char ch[2];
68 int p,q;
69 int cnt = 1;
70 while(scanf("%s", ch) != EOF) {
71 //dbg(ch[0]);
72 if(ch[0] == ‘O‘) {
73 scanf("%d",&p);
74 //getchar();
75 canuse[cnt++] = p;
76 for(int i = 1; i 1; ++i) {
77 if(cal(a[canuse[i]],a[p]) double(d)) {
78 join(canuse[i],p);
79 }
80 }
81 }
82 if(ch[0] == ‘S‘) {
83 scanf("%d %d",&p,&q);
84 //getchar();
85
86 //join(p,q);
87 if(fid(p) == fid(q)) {
88 puts("SUCCESS");
89 }
90 else {
91 puts("FAIL");
92 }
93 }
94 }
95 return 0;
96 }
View Code
A - Wireless Network POJ - 2236-kuangbin带你飞
标签：getc network getchar bin scanf The cat cst body
原文地址：https://www.cnblogs.com/orangeko/p/12264155.html
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