hdu 2144 Evolution(并查集+dp)

 1 #include<iostream>
 2 #include<cstdio>
 3 #include<cstdlib>
 4 #include<cstring>
 5 #include<string>
 6 #include<queue>
 7 #include<algorithm>
 8 #include<map>
 9 #include<iomanip>
10 #include<climits>
11 #include<string.h>
12 #include<cmath>
13 #include<stdlib.h>
14 #include<vector>
15 #include<stack>
16 #include<string.h>
17 #include<set>
18 #define INF 1e7
19 #define MAXN 10010
20 #define maxn 1000010
21 #define Mod 1000007
22 #define N 110
23 using namespace std;
24 typedef long long LL;
25 
26 int n;
27 double m;
28 char str[N][N];
29 int fa[N], len[N], dp[N][N];
30 
31 int findset(int x)
32 {
33     return fa[x] = fa[x] == x ? x : findset(fa[x]);
34 }
35 
36 int getlen(int a, int b)
37 {
38     int re = 0;
39     memset(dp[0], 0, sizeof(dp[0]));
40     for (int i = 1; i <= len[a]; i++)
41     {
42         dp[i][0] = 0;
43         for (int j = 1; j <= len[b]; j++)
44         {
45             if (str[a][i] == str[b][j])    dp[i][j] = dp[i - 1][j - 1] + 1;
46             else    dp[i][j] = 0;
47             if (re < dp[i][j]) re = dp[i][j];
48         }
49     }
50     return re;
51 }
52 int main()
53 {
54     int T = 1;
55     int x, y, l;
56     while (cin >> n >> m)
57     {
58         for (int i = 0; i < n; i++)
59             fa[i] = i;
60         for (int i = 0; i < n; i++)
61         {
62             scanf("%s", str[i] + 1);
63             str[i][0] = ‘ ‘;
64             len[i] = strlen(str[i]) - 1;
65             for (int j = 0; j < i; j++)
66             {
67                 int x = findset(i);
68                 int y = findset(j);
69                 if (x == y)    continue;
70                 l = getlen(i, j);
71                 if (l*100.0 / len[i] > m && l*100.0 / len[j] > m)
72                     fa[x] = y;
73             }
74         }
75         int ans = 0;
76         for (int i = 0; i < n; i++)    if (fa[i] == i)    ans++;
77         printf("Case %d:\n%d\n", T++, ans);
78     }
79     return 0;
80 }