Problem: Example

Input

2 4
%.@\$
..\$\$


Output

Yes

Solution (in CPP):

Solution:
#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<cstring>
#include<queue>
#include<stack>
#include<cstdio>
#include<sstream>
#include<iomanip>
#include<assert.h>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define pb push_back
#define all(in) in.begin(),in.end()
#define shosu(x) fixed<<setprecision(x)
using namespace std;
//kaewasuretyuui
typedef long long ll;
typedef int Def;
typedef pair<Def,Def> pii;
typedef vector<Def> vi;
typedef vector<vi> vvi;
typedef vector<pii> vp;
typedef vector<vp> vvp;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef pair<Def,pii> pip;
typedef vector<pip>vip;

#define mt make_tuple
typedef tuple<int,int,int> tp;
typedef vector<tp> vt;

const double PI=acos(-1);
const double EPS=1e-7;
const int inf=1e9;
const ll INF=2e18;
int dx[]={0,1,0,-1};
int dy[]={1,0,-1,0};
int n,m;
vs in;
vvi d,dp;
bool dfs(int a,int b,int c){
	if(dp[a][b]<c)return 0;
	rep(i,4){
		int x=a+dx[i];
		int y=b+dy[i];
		if(x<0||y<0||x>=n||y>=m||in[x][y]=='#'||d[x][y]<=c+1||c+1>=dp[x][y])continue;
		if(in[x][y]=='%'){
			cout<<"Yes"<<endl;
			return 1;
		}
		d[x][y]=c+1;
		if(dfs(x,y,c+1))return 1;
	}
	return 0;
}
int main(){
	cin>>n>>m;
	in=vs(n);
	rep(i,n)cin>>in[i];
	dp=vvi(n,vi(m,inf));
	priority_queue<tp>que;
	rep(i,n)rep(j,m)if(in[i][j]=='$'){
		que.push(tp(i,j,0));
		dp[i][j]=0;
	}
	while(!que.empty()){
		int x,y,co;
		tie(x,y,co)=que.top();
		que.pop();
		if(dp[x][y]<co)continue;
		rep(i,4){
			int nx=x+dx[i];
			int ny=y+dy[i];
			if(nx<0||ny<0||nx>=n||ny>=m||in[nx][ny]=='#'||dp[nx][ny]<=co+1)continue;
			dp[nx][ny]=co+1;
			que.push(tp(nx,ny,co+1));
		}
	}
	d=vvi(n,vi(m,inf));
	rep(i,n)rep(j,m)if(in[i][j]=='@'){
		d[i][j]=0;
		if(!dfs(i,j,0))cout<<"No"<<endl;
	}
}