简单dfs
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74 |
#include <cstdio>#include <cstdlib>#include <cmath>#include <map>#include <set>#include <queue>#include <stack>#include <vector>#include <sstream>#include <string>#include <cstring>#include <algorithm>#include <iostream>#define maxn 100010#define INF 0x7fffffff#define inf 100000000#define MOD 1000000007#define ULL unsigned long long#define LL long longusing
namespace std;bool
vis[110][110];char
mmap[110][110];int
n, m;void
dfs(int
x, int
y) { vis[x][y] = 1; if(!vis[x+1][y] && mmap[x+1][y] == ‘W‘) { dfs(x+1, y); } if(!vis[x-1][y] && mmap[x-1][y] == ‘W‘) { dfs(x-1, y); } if(!vis[x][y+1] && mmap[x][y+1] == ‘W‘) { dfs(x, y+1); } if(!vis[x][y-1] && mmap[x][y-1] == ‘W‘) { dfs(x, y-1); } if(!vis[x+1][y+1] && mmap[x+1][y+1] == ‘W‘) { dfs(x+1, y+1); } if(!vis[x+1][y-1] && mmap[x+1][y-1] == ‘W‘) { dfs(x+1, y-1); } if(!vis[x-1][y+1] && mmap[x-1][y+1] == ‘W‘) { dfs(x-1, y+1); } if(!vis[x-1][y-1] && mmap[x-1][y-1] == ‘W‘) { dfs(x-1, y-1); }}int
main(){ while(scanf("%d%d", &n, &m) == 2) { memset(vis, 0, sizeof(vis)); for(int
i = 1; i <= n; ++ i) { scanf("%s", mmap[i]+1); } int
ans = 0; for(int
i = 1; i <= n; ++ i) { for(int
j = 1; j <= m; ++ j) { if(!vis[i][j] && mmap[i][j] == ‘W‘) { ++ ans; dfs(i, j); } } } printf("%d\n", ans); } return
0;} |
原文地址：http://www.cnblogs.com/avema/p/3774144.html
