http://acm.hdu.edu.cn/showproblem.php?pid=4678
之前写了一并差集找连通块 貌似不对 比赛时写的dfs爆栈了 只好用bfs了
单独数字块 为1
空白+数字块 数字数%2+1
异或
1 #include <iostream> 2 #include<cstdio> 3 #include<cstring> 4 #include<stdlib.h> 5 #include<algorithm> 6 #include<queue> 7 using namespace std; 8 #define N 1010 9 int dis[8][2] = {1,0,-1,0,0,1,0,-1,1,1,1,-1,-1,1,-1,-1}; 10 int n,m,k; 11 int vis[N][N],o[N][N],f[N][N]; 12 struct node 13 { 14 int x,y; 15 }; 16 int bfs(int x,int y) 17 { 18 queue<node>q; 19 struct node st,sd; 20 int num = 0,i; 21 st.x = x; 22 st.y = y; 23 vis[x][y] = 1; 24 q.push(st); 25 while(!q.empty()) 26 { 27 sd = q.front(); 28 int tx = sd.x; 29 int ty = sd.y; 30 q.pop(); 31 for(i = 0 ;i < 8 ; i++) 32 { 33 int dx = tx+dis[i][0]; 34 int dy = ty+dis[i][1]; 35 if(dx>=0&&dx<n&&dy>=0&&dy<m&&!vis[dx][dy]) 36 { 37 vis[dx][dy] = 1; 38 if(!f[dx][dy]&&o[dx][dy]) 39 num++; 40 st.x = dx; 41 st.y = dy; 42 if(!f[dx][dy]&&!o[dx][dy]) 43 q.push(st); 44 } 45 } 46 } 47 if(num%2==0) 48 return 1; 49 return 2; 50 } 51 int main() 52 { 53 int i,j,t,kk=0; 54 scanf("%d",&t); 55 while(t--) 56 { 57 kk++; 58 scanf("%d%d%d",&n,&m,&k); 59 for(i = 0 ; i <= n ; i++) 60 for(j = 0 ; j <= m ; j++) 61 { 62 f[i][j] = 0; 63 o[i][j] = 0; 64 vis[i][j] = 0; 65 } 66 while(k--) 67 { 68 int x,y; 69 scanf("%d%d",&x,&y); 70 f[x][y] = 1; 71 for(i = 0 ; i < 8 ; i++) 72 { 73 int tx = x+dis[i][0]; 74 int ty = y+dis[i][1]; 75 if(tx>=0&&tx<n&&ty>=0&&ty<m) 76 o[tx][ty] = 1; 77 } 78 } 79 int ans=0; 80 for(i = 0 ; i < n ; i++) 81 for(j = 0 ; j < m ; j++) 82 if(!f[i][j]&&!vis[i][j]&&o[i][j]==0) 83 { 84 int w = bfs(i,j); 85 ans ^= w; 86 } 87 for(i = 0 ; i < n ; i++) 88 for(j = 0 ; j < m ; j++) 89 if(!f[i][j]&&!vis[i][j]&&o[i][j]) 90 ans ^= 1; 91 printf("Case #%d: ",kk); 92 if(ans==0) 93 printf("Fanglaoshi "); 94 else 95 printf("Xiemao "); 96 } 97 return 0; 98 }