Find a way HDU - 2612-白红宇

Find a way HDU - 2612

阅读量：4686 次

发布时间：2019-06-09

本文共 2400 字，大约阅读时间需要 8 分钟。

Pass a year learning in Hangzhou, yifenfei arrival hometown Ningbo at finally. Leave Ningbo one year, yifenfei have many people to meet. Especially a good friend Merceki.

Yifenfei’s home is at the countryside, but Merceki’s home is in the center of city. So yifenfei made arrangements with Merceki to meet at a KFC. There are many KFC in Ningbo, they want to choose one that let the total time to it be most smallest.

Now give you a Ningbo map, Both yifenfei and Merceki can move up, down ,left, right to the adjacent road by cost 11 minutes.

InputThe input contains multiple test cases.

Each test case include, first two integers n, m. (2<=n,m<=200).

Next n lines, each line included m character.

‘Y’ express yifenfei initial position.

‘M’ express Merceki initial position.

‘#’ forbid road;

‘.’ Road.

‘@’ KCF

OutputFor each test case output the minimum total time that both yifenfei and Merceki to arrival one of KFC.You may sure there is always have a KFC that can let them meet.Sample Input

4 4Y.#@.....#..@..M4 4Y.#@.....#..@#.M5 5Y..@..#....#...@..M.#...#

Sample Output

#include
     
      #include
      
       #include
       
        #include
        
         #include
         
          #include
          
           #include
           
            #include
            
             #include
             
              #include
              
               #include
               
                #include
                #include
                 
                  using namespace std;const int INF=204;const int M=0x1f1f1f1f;int n,m,z;char cnt[INF][INF];int dir[][2]={ { 1,0},{ 0,-1},{-1,0},{ 0,1}};int dis[INF][INF][2];int vis[INF][INF];struct Node{ int x,y,step; Node(int x,int y,int z):x(x),y(y),step(z){} Node(){}};void bfs(int x,int y){ memset(vis,0,sizeof(vis)); vis[x][y]=1; queue
                  
                   q; q.push(Node(x,y,0)); while(!q.empty()){ Node u=q.front(); q.pop(); for(int i=0;i<4;i++){ int tx=u.x+dir[i][0]; int ty=u.y+dir[i][1]; if(!vis[tx][ty]&&tx>=1&&tx<=n&&ty>=1&&ty<=m&&cnt[tx][ty]!='#'){ vis[tx][ty]=1; dis[tx][ty][z]=u.step+1; q.push(Node(tx,ty,u.step+1)); } } }}int main(){ while(cin>>n>>m){ for(int i=0;i<2;i++){ for(int j=1;j<=n;j++){ for(int k=1;k<=m;k++) dis[j][k][i]=M; } } for(int i=1;i<=n;i++) scanf("%s",cnt[i]+1); for(int i=1;i<=n;++i) for(int j=1;j<=m;j++){ if(cnt[i][j]=='Y'){ z=1; bfs(i,j); } if(cnt[i][j]=='M'){ z=0; bfs(i,j); } } int ans=M; for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ if(cnt[i][j]=='@'){ //去同一家KFC的距离之和 ans=min(ans,dis[i][j][0]+dis[i][j][1]); } } } cout<
                   
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转载于:https://www.cnblogs.com/CuteAbacus/p/9492221.html

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