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| #include <bits/stdc++.h>
using namespace std;
int n,m;
int cx,cy;
int fx,fy;
int c[1010][1010];
int vis1[1010][1010];
int vis2[1010][1010];
int des[5][2] = {{0,0},{0,1},{0,-1},{1,0},{-1,0}};
struct p {
int x;
int y;
};
bool check(int x,int y){
if(x >= 1 && x <= n && y >= 1 && y <= m && (c[x][y] == '.'''c[x][y] == '@')){
return 1 ;
}
return 0;
}
queue<p>q1;
void bfs1(){
while(!q1.empty()){
p pp = q1.front();
q1.pop();
p pz;
for(int i = 1; i <= 4 ; i++){
pz.x = pp.x + des[i][0] ;
pz.y = pp.y + des[i][1] ;
if(check(pz.x,pz.y)){
if(vis1[pz.x][pz.y] == 0){
vis1[pz.x][pz.y] = vis1[pp.x][pp.y] + 1;
q1.push(pz) ;
}
}
}
}
}
queue<p>q2;
void bfs2(){
while(!q2.empty()){
p pp = q2.front();
q2.pop();
p pz;
for(int i = 1; i <= 4 ; i++){
pz.x = pp.x + des[i][0] ;
pz.y = pp.y + des[i][1] ;
if(check(pz.x,pz.y)){
if(vis2[pz.x][pz.y] == 0){
vis2[pz.x][pz.y] = vis2[pp.x][pp.y] + 1;
q2.push(pz) ;
}
}
}
}
}
struct person {
int x;
int y;
int cnt;
};
int main(){
while(scanf("%d %d",&n,&m) != EOF){
getchar();
memset(vis1,0,sizeof vis1);
memset(vis2,0,sizeof vis2);
for(int i = 1; i <= n ; i++){
for(int j = 1 ; j <= m ; j++){
scanf("%c",&c[i][j]);
if(c[i][j] == 'Y'){
c[i][j] = '.';
vis1[i][j] = 1;
p pp;
pp.x = i;
pp.y = j;
q1.push(pp);
}
if(c[i][j] == 'M'){
c[i][j] = '.';
vis2[i][j] = 1;
p pp;
pp.x = i;
pp.y = j;
q2.push(pp);
}
}
getchar();
}
bfs1();
bfs2();
int maxx = 10000;
for(int i = 1; i <= n ; i++){
for(int j = 1; j <= m ; j++){
if(c[i][j] == '@' && vis1[i][j] != 0 && vis2[i][j] != 0){
maxx = min(maxx,vis1[i][j] + vis2[i][j] -2);
}
}
}
printf("%d\n",maxx*11);
}
}
|