https://www.acmicpc.net/problem/1103
char - ‘0’
하면 됨#include<bits/stdc++.h>
using namespace std;
int N,M;
const int dx[4] = {-1,1,0,0};
const int dy[4] = {0,0,-1,1};
char board[51][51];
bool visited[51][51];
int dp[51][51];
int solve(int x, int y){
if(x<0||x>=N||y<0||y>=M||board[x][y]==-1) return 0;
if(visited[x][y]){cout<<-1<<"\n"; exit(0);}
if(dp[x][y]) return dp[x][y];
visited[x][y] = true;
for(int i = 0; i<4; i++){
int nx = x + dx[i]*(board[x][y]-'0');
int ny = y + dy[i]*(board[x][y]-'0');
dp[x][y] = max(dp[x][y], solve(nx,ny)+1);
}
visited[x][y] = false;
return dp[x][y];
}
int main(){
cin>>N>>M;
for(int i = 0; i<N; i++){
string s; cin>>s;
for(int j = 0; j<M; j++){
if(s[j]=='H') board[i][j] = -1;
else board[i][j] = s[j];
}
}
cout<<solve(0,0)<<"\n";
}
다시해보장..