mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
#include<cstdio>
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#include<cstring>
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int t,n=7,m=8,num,dir[4][2]={-1,0,0,-1,0,1,1,0};
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int path[15],f[15];
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char map[15][15],p[]="ULRD",pathc[15];
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int ok(int x,int y)
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{
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if(x<0||y<0||x>=n||y>=m)
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return 0;
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return 1;
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}
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int dfs(int pos)
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{
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if(pos==num-1)
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return 1;
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int i,j,k,x,y,tx[15],ty[15];
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for(i=0;i<n;i++)
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for(j=0;j<m;j++)
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if(map[i][j]=='O')
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for(k=0;k<4;k++)
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{
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int flag=0,cnt=0;
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x=i+dir[k][0];
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y=j+dir[k][1];
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if(map[x][y]=='O')
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continue;
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while(ok(x,y))
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{
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if(map[x][y]=='O')
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{
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flag=1;
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tx[cnt]=x;
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ty[cnt++]=y;
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}
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x+=dir[k][0];
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y+=dir[k][1];
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}
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if(flag)
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{
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map[i][j]='X';
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for(int ii=0;ii<cnt;ii++)
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{
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map[tx[ii]][ty[ii]]='X';
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map[tx[ii]-dir[k][0]][ty[ii]-dir[k][1]]='O';
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}
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path[pos]=i*m+j;
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pathc[pos]=p[k];
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if(dfs(pos+1))
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return 1;
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map[i][j]='O';
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x=i+dir[k][0];
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y=j+dir[k][1];
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while(ok(x,y))
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{
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if(map[x][y]=='O')
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map[x][y]='X';
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x+=dir[k][0];
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y+=dir[k][1];
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}
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for(int ii=0;ii<cnt;ii++)
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map[tx[ii]][ty[ii]]='O';
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}
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}
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return 0;
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}
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int main()
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{
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while(~scanf("%s",map[0]))
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{
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int i,j;
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num=0;
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memset(f,0,sizeof(f));
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for(i=1;i<n;i++)
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scanf("%s",map[i]);
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for(i=0;i<n;i++)
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for(j=0;j<m;j++)
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if(map[i][j]=='O')
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num++;
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dfs(0);
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if(t)
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puts("");
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printf("CASE #%d:\n",++t);
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for(i=0;i<num-1;i++)
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printf("%d %d %c\n",path[i]/m,path[i]%m,pathc[i]);
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}
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}
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