Please help I am getting Runtime Error for a test case


  • 0
    A
    class Solution {
    public:
        int help(vector<vector<char>> &board,vector<vector<int>> &vis,vector<int> &xx,vector<int> &yy,int x,int y)
        {
            int i,j,m,n;
            m=board.size();
            n=board[0].size();
            
           
            if(x<0 || x>=m || y<0 || y>=n)
                return 0;
            
            
            
            if(!vis[x][y] && board[x][y]=='O')
            {
           //  cout<<x<<" "<<y<<endl;
                if(x==0 || x==m-1 || y==0 || y==n-1)
                        return 1;
               
    
                vis[x][y]=1;
                
                xx.push_back(x);
                yy.push_back(y);
                
                return  help(board,vis,xx,yy,x+1,y) ||  help(board,vis,xx,yy,x-1,y) ||  help(board,vis,xx,yy,x,y-1) ||  help(board,vis,xx,yy,x,y+1);
            }
            return 0;
            
        }
        void solve(vector<vector<char>>& board) {
            
            int i,j,m,n;
            m=board.size();
            if(m==0)
                return ;
            n=board[0].size();
            if(n==0)
                return ;
            vector<vector<int>> vis(m,vector<int> (n,0));
            
           
            for(i=1;i<m-1;i++)
            {
                for(j=1;j<n-1;j++)
                {
                     vector<int> xx;
                    vector<int> yy;
                     //cout<<i<<" "<<j<<endl;
                    if(board[i][j]=='O' && !vis[i][j])
                    {
                        // cout<<i<<" "<<j<<endl;
                        if(!help(board,vis,xx,yy,i,j))
                        {
                     //    cout<<endl;  
                            for(int k=0;k<xx.size();k++)
                            {
                                //cout<<xx[k]<<endl;
                                board[xx[k]][yy[k]]='X';
                            }
                        }
                    }
                }
            }
            
        }
    };

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