建议字符输入用 %s 或者cin
by Papaya @ 2018-11-04 17:30:35
@[我是一头猪啊](/space/show?uid=73355) 谢谢大佬
但还是死
by somethingfornothing @ 2018-11-04 17:43:32
@[Mr_chen](/space/show?uid=70723) 搜过的节点就不要搜了。。。不然可以一直在两个点打转
by Papaya @ 2018-11-04 17:44:59
@[我是一头猪啊](/space/show?uid=73355) 谢谢大佬
by somethingfornothing @ 2018-11-04 21:45:15
改了后全WA了
```
#include<cstdio>
#include<iostream>
using namespace std;
char a[21][21];
int w,h;
bool used[21][21];
int ans,sum;
void dfs(int x,int y)
{
if(x<1||x>h||y<1||y>w||a[x][y]=='#')
{
if(ans<sum)ans=sum;
return;
}
if(used[x][y]==0)
{
used[x][y]=1;
dfs(x+1,y);
dfs(x-1,y);
dfs(x,y+1);
dfs(x,y-1);
sum++;
}
}
int main()
{
int x,y;
scanf("%d%d",&w,&h);
for(int i=1;i<=w;i++)
{
for(int j=1;j<=h;j++)
{
scanf("%c",&a[i][j]);
if(a[i][j]=='@')
{
x=i;
y=i;
sum++;
}
}
}
dfs(x,y);
cout<<ans;
}
```
by somethingfornothing @ 2018-11-04 22:11:40