hdu1068 Girls and Boys 匈牙利算法（邻接表） 

 1 #include <cstdio>
 2 #include <algorithm>
 3 #include <cstring>
 4 #include <vector>
 5 using namespace std;
 6 
 7 const int maxn = 10008;
 8 vector<int>map[maxn];
 9 bool mark[maxn];
10 int link[maxn];
11 int n;
12 
13 void init(){
14     for (int i = 0; i <= n; i++){
15         map[i].clear();
16     }
17     memset(mark, false, sizeof(mark));
18     memset(link, -1, sizeof(link));
19 }
20 
21 bool dfs(int x){
22     int k = map[x].size();
23     for (int j = 0; j < k; j++){
24         int v = map[x][j];
25         if (!mark[v]){
26             mark[v] = true;
27             if (link[v] == -1 || dfs(link[v])){
28                 link[v] = x;
29                 return true;
30             }
31         }
32     }
33     return false;
34 }
35 
36 int main(){
37     while (scanf("%d", &n) != EOF){
38         init();
39         for (int i = 0; i < n; i++){
40             int x, y;
41             scanf("%d: (%d)", &x, &y);
42             for (int j = 0; j < y; j++){
43                 scanf("%d", &x);
44                 map[i].push_back(x);
45             }
46         }
47 
48         int ans = 0;
49         for (int i = 0; i < n; i++){
50             memset(mark, false, sizeof(mark));
51             if (dfs(i))
52                 ans++;
53         }
54         printf("%d\n", n - ans / 2);
55     }
56     //system("pause");
57     return 0;
58 }

 

posted @ 2017-09-14 21:43  ouyang_wsgwz  阅读(192)  评论(0)    收藏  举报