weberzcm @ 2024-11-27 22:00:45
#include<bits/stdc++.h>
using namespace std;
int n,m,ans,dp[1005][1005],d[100005][2],dx[]={0,0,1,-1},dy[]={1,-1,0,0};
char a[1005][1005];
void dfs(int x,int y)
{
ans++;
d[ans][0]=x;
d[ans][1]=y;
dp[x][y]=1;
for(int i=0;i<4;++i)
{
int nx=x+dx[i];
int ny=y+dy[i];
if(nx<1||nx>n||ny<1||ny>n||dp[nx][ny]>0||a[nx][ny]==a[x][y]) continue;
dfs(nx,ny);
}
}
int main()
{
cin>>n>>m;
for(int i=1;i<=n;++i)
for(int j=1;j<=n;++j)
cin>>a[i][j];
while(m--)
{
ans=0;
int x,y;
cin>>x>>y;
if(dp[x][y]>0)
{
cout<<dp[x][y]<<endl;
continue;
}
dfs(x,y);
for(int j=1;j<=ans;++j)
dp[d[j][0]][d[j][1]]=ans;
cout<<ans<<endl;
}
return 0;
}
各位大佬,救救58~