保AC!!!直接硬干！

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin >> n >> m;
    char s[n+1][m+1];
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>s[i][j];
        }
    }
    bool flag=false;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            //左下
            if(s[i][j]=='L'&&s[i-1][j]=='Q'&&s[i-1][j+1]=='B'&&s[i][j+1]=='S'){
                flag=true;
                break;
            }
            if(s[i][j]=='L'&&s[i-1][j]=='B'&&s[i-1][j+1]=='Q'&&s[i][j+1]=='S'){
                flag=true;
                break;
            }
            //左上
            if(s[i][j]=='L'&&s[i+1][j]=='Q'&&s[i+1][j+1]=='B'&&s[i][j+1]=='S'){
                flag=true;
                break;
            }
            if(s[i][j]=='L'&&s[i+1][j]=='B'&&s[i+1][j+1]=='Q'&&s[i][j+1]=='S'){
                flag=true;
                break;
            }
            //右下
            if(s[i][j]=='L'&&s[i][j-1]=='Q'&&s[i-1][j-1]=='B'&&s[i-1][j]=='S'){
                flag=true;
                break;
            }
            if(s[i][j]=='L'&&s[i][j-1]=='B'&&s[i-1][j-1]=='Q'&&s[i-1][j]=='S'){
                flag=true;
                break;
            }
            //右上
            if(s[i][j]=='L'&&s[i][j-1]=='Q'&&s[i+1][j-1]=='B'&&s[i+1][j]=='S'){
                flag=true;
                break;
            }
            if(s[i][j]=='L'&&s[i][j-1]=='B'&&s[i+1][j-1]=='Q'&&s[i+1][j]=='S'){
                flag=true;
                break;
            }
            
        }
    }
    if(flag==true){
        cout<<"-1";
    }else{
        int sum=0;
        for(int i=1;i<=n;i++){
            for(int j=1;j<=m;j++){
                //左下
                if(s[i][j]=='L'&&s[i-1][j]=='Q'&&s[i-1][j+1]=='B'&&s[i-1][j+2]=='S'){
                    sum++;
                }
                if(s[i][j]=='S'&&s[i-1][j]=='B'&&s[i-1][j+1]=='Q'&&s[i-1][j+2]=='L'){
                    sum++;
                }
                //右下
                if(s[i][j]=='L'&&s[i-1][j]=='Q'&&s[i-1][j-1]=='B'&&s[i-1][j-2]=='S'){
                    sum++;
                }
                if(s[i][j]=='S'&&s[i-1][j]=='B'&&s[i-1][j-1]=='Q'&&s[i-1][j-2]=='L'){
                    sum++;
                }
                //左上
                if(s[i][j]=='L'&&s[i+1][j]=='Q'&&s[i+1][j+1]=='B'&&s[i+1][j+2]=='S'){
                    sum++;
                }
                if(s[i][j]=='S'&&s[i+1][j]=='B'&&s[i+1][j+1]=='Q'&&s[i+1][j+2]=='L'){
                    sum++;
                }
                //右上
                if(s[i][j]=='L'&&s[i+1][j]=='Q'&&s[i+1][j-1]=='B'&&s[i+1][j-2]=='S'){
                    sum++;
                }
                if(s[i][j]=='S'&&s[i+1][j]=='B'&&s[i+1][j-1]=='Q'&&s[i+1][j-2]=='L'){
                    sum++;
                }
                if(s[i][j]=='L'&&s[i+1][j]=='Q'&&s[i+2][j]=='B'&&s[i+3][j]=='S'){
                    sum++;
                }
                if(s[i][j]=='L'&&s[i][j+1]=='Q'&&s[i][j+2]=='B'&&s[i][j+3]=='S'){
                    sum++;
                }
                if(s[i][j]=='L'&&s[i][j-1]=='Q'&&s[i][j-2]=='B'&&s[i][j-3]=='S'){
                    sum++;
                }
                if(s[i][j]=='L'&&s[i-1][j]=='Q'&&s[i-2][j]=='B'&&s[i-3][j]=='S'){
                    sum++;
                }
            }
        }
        cout<<sum;
    }
    return 0;
    //许睿ruirui独创，拒绝抄袭，参考答案。
}