PKU 3338 Rectangle Cutting

PKU 3338 Rectangle Cutting

比较烦人的模拟

 1 #include < stdio.h >
 2 #include < string .h >
 3 char  xy[ 30 ][ 30 ],yx[ 30 ][ 30 ],use[ 30 ][ 30 ];
 4 int  n,m;
 5 void  di( int  x, int  y)
 6 {
 7    if(x>=m||y>=n)return;
 8    use[x][y]=0;
 9    //printf("%d %d\n",x,y);
10    if(xy[x][y+1]&&use[x-1][y])di(x-1,y);
11    if(xy[x+1][y+1]&&use[x+1][y])di(x+1,y);
12    if(yx[y+1][x+1]&&use[x][y+1])di(x,y+1);
13    if(yx[y][x+1]&&use[x][y-1])di(x,y-1);
14}
15 int  main()
16 {
17    int  ans,i,k,x1,x2,y1,y2,t,j;
18    while(scanf("%d%d",&n,&m),n)
19    {
20        memset(xy,1,sizeof(xy));
21        memset(use,1,sizeof(use));
22        memset(yx,1,sizeof(yx));
23        ans=0;
24        for(i=1;i<=m;i++)yx[0][i]=0;
25        for(i=1;i<=m;i++)yx[n][i]=0;
26        for(i=1;i<=n;i++)xy[0][i]=0;
27        for(i=1;i<=n;i++)xy[m][i]=0;
28        scanf("%d",&k);
29        while(k--)
30        {
31            scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
32            if(x1>x2){t=x1;x1=x2;x2=t;}
33            if(y1>y2){t=y1;y1=y2;y2=t;}
34        //    printf("asdasdasdas%d %d\n",x1,y1);
35            for(i=y1+1;i<=y2;i++)xy[x1][i]=0;
36            for(i=y1+1;i<=y2;i++)xy[x2][i]=0;
37            for(i=x1+1;i<=x2;i++)yx[y1][i]=0;
38            for(i=x1+1;i<=x2;i++)yx[y2][i]=0;
39        }
40    //    printf("asdasdasdas%d\n",xy[1][1]);
41        for(i=0;i<m;i++)
42            for(j=0;j<n;j++)
43            {
44                if(use[i][j] && (xy[i][j+1] || xy[i+1][j+1] || yx[j][i+1] || yx[j+1][i+1]))
45                {
46                    //printf("******************\n");
47                    di(i,j);
48                    ans++;
49                }
50            }
51        for(i=0;i<m;i++)
52            for(j=0;j<n;j++)if(use[i][j])ans++;
53        printf("%d\n",ans);
54
55    }
56    return 0;
57}
58
59