mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
#include<iostream>
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#include<algorithm>
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#include<queue>
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using namespace std;
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char g[100][100];
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bool vis[88][88][88];
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int n,m,p,t,si,sj,ans;
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int dir[4][2]={{1,0},{0,1},{-1,0},{0,-1}};
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struct node
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{
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int step,p,x,y;
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node(int a=0,int b=0,int c=0,int d=0):x(a),y(b),p(c),step(d){}
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bool friend operator <(const node a,const node b)
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{
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return a.step>b.step;
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}
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};
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void BFS()
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{
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priority_queue<node> Q;
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node f=node(si,sj,p,0);
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Q.push(f);
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memset(vis,false,sizeof(vis));
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vis[si][sj][p]=true;
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node temp;
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while(!Q.empty())
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{
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temp=Q.top();
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Q.pop();
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if(temp.step>t)
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return ;
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if(g[temp.x][temp.y]=='L')
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{
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ans=temp.step;
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return ;
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}
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for(int k=0;k<4;k++)
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{
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int i=dir[k][0]+temp.x;
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int j=dir[k][1]+temp.y;
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if(i<0||i>n-1 || j<0 || j>m-1||g[i][j]=='#')
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continue;
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if(temp.p!=0 && !vis[i][j][temp.p-1])
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{
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vis[i][j][temp.p-1]=true;
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Q.push(node(i,j,temp.p-1,temp.step+1));
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}
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if(g[temp.x][temp.y]!='@' && g[i][j]!='@'&&!vis[i][j][temp.p])
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{
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vis[i][j][temp.p]=true;
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Q.push(node(i,j,temp.p,temp.step+2));
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}
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}
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}
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return ;
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}
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int main()
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{
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int cas=0;
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while(scanf("%d %d %d %d",&n,&m,&t,&p)==4)
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{
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for(int i=0;i<n;i++)
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{
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scanf("%s",g[i]);
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for(int j=0;j<m;j++)
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if(g[i][j]=='Y')
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si=i,sj=j;
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}
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ans=100001;
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BFS();
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printf("Case %d:\n",++cas);
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if(ans>t)
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printf("Poor Yifenfei, he has to wait another ten thousand years.\n");
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else printf("Yes, Yifenfei will kill Lemon at %d sec.\n",ans);
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}
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return 0;
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}
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