简单dfs
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#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 long using
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:http://www.cnblogs.com/avema/p/3774144.html