原本以为是$exit$的事情，但改了还是不对
by cokkie @ 2023-09-02 22:16:24
```cpp
#include<bits/stdc++.h>
using namespace std;
int n,m,ans,a[41][41],dx[4]={1,0,0,-1},dy[4]={0,1,-1,0};
void dfs(int x,int y){
if(x==n&&y==m){
return ;
}
int ma;
for(int i=0;i<4;i++){
int nx=x+dx[i],ny=y+dy[i];
if(nx>=1&&nx<=n&&ny>=1&&ny<=m&&a[nx][ny]>ma)
ma=a[nx][ny];
}
ans+=ma;
for(int i=0;i<4;i++){
int nx=x+dx[i],ny=y+dy[i];
if(a[nx][ny]==ma){
a[nx][ny]=0;
dfs(nx,ny);
a[nx][ny]=ma;
}
}
}
int main(){
cin >> n >> m;
for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) cin >> a[i][j];
ans=a[1][1];
dfs(1,1);
cout << ans;
return 0;
}
```
by cokkie @ 2023-09-02 22:16:57
代码奉上
by cokkie @ 2023-09-02 22:17:18
有人回的话最好@一下thx
by cokkie @ 2023-09-02 22:17:50