mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
114 lines
2.5 KiB
C++
114 lines
2.5 KiB
C++
#include <cstdio>
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#include <cmath>
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#include <cstring>
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#include <string>
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#include <algorithm>
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#include <iostream>
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#include <queue>
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#include <set>
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#include <vector>
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using namespace std;
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struct node
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{
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int x,y;
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int time;
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};
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int n,m;
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queue<node> qq;
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char tm[205][205];
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char vis[205][205];
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int kfc[2005][2];
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int ans1[505][505];
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int ans2[505][505];
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int ans[505][505][3];
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int dir[][2]={0,-1, 0,1, -1,0, 1,0};
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int y11,y2;
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int m1,m2;
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int bfs(int f,int c)
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{
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while(!qq.empty()) qq.pop();
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int i;
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node tmp;
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tmp.x=f;
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tmp.y=c;
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tmp.time=0;
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qq.push(tmp);
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vis[f][c]=1;
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while(!qq.empty())
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{
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node t=qq.front();
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qq.pop();
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node k=t;
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for (i=0;i<4;i++)
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{
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t=k;
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t.x+=dir[i][0];
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t.y+=dir[i][1];
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if ((tm[t.x][t.y]=='.'||tm[t.x][t.y]=='@')&&vis[t.x][t.y]==0&& t.x>=1 &&t.y<=m&&t.y>=1&&t.x<=n)
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{
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vis[t.x][t.y]=1;
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t.time++;
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{
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if ( f==y11 && c==y2 )
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{
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ans[t.x][t.y][0]=t.time;
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}
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else
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{
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ans[t.x][t.y][1]=t.time;
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}
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}
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qq.push(t);
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}
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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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int i,j;
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while(scanf("%d%d",&n,&m)!=EOF)
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{
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getchar();
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int ok=0;
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for (i=1;i<=n;i++)
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{
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for (j=1;j<=m;j++)
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{
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scanf("%c",&tm[i][j]);
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if (tm[i][j]=='Y')
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{
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y11=i;
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y2=j;
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}
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if (tm[i][j]=='M')
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{
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m1=i;
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m2=j;
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}
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if (tm[i][j]=='@')
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{
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kfc[++ok][0]=i;
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kfc[ok][1]=j;
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}
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}
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getchar();
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}
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int max=0x7f7f7f7f;
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int h;
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memset(vis,0,sizeof(vis));
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bfs(y11,y2);
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memset(vis,0,sizeof(vis));
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bfs(m1,m2);
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for (h=1;h<=ok;h++)
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{
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int q1=kfc[h][0];
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int q2=kfc[h][1];
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max=__min(ans[q1][q2][0]+ans[q1][q2][1],max);
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}
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__int64 ans=max*11;
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printf("%I64d\n",ans);
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}
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return 0;
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}
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