1275. Find Winner on a Tic Tac Toe Game

class Solution {
public:
    string tictactoe(vector<vector<int>>& moves) {
        vector<vector<char>> grid(3, vector<char> (3));
        char val = 'x';

        for(auto a : moves)
        {
            grid[a[0]][a[1]] = val;

            if(val == 'x') 
                val = 'o';
            else 
                val = 'x';
        }


        //check for row and column 
        for(int i = 0; i<3; i++)
        {   
            //row check
            if(grid[i][0] =='x' && grid[i][1] =='x' && grid[i][2] == 'x')
                return "A";
            if(grid[i][0] =='o' && grid[i][1] =='o' && grid[i][2] == 'o')
                return "B";

            //column check
            if(grid[0][i] =='x' && grid[1][i] =='x' && grid[2][i] == 'x')
                return "A";
            if(grid[0][i] =='o' && grid[1][i] =='o' && grid[2][i] == 'o')
                return "B";
            
        }

        //diagonal check

        if(grid[0][0]=='x' && grid[1][1]=='x' && grid[2][2]=='x')
            return "A";
        if(grid[0][2]=='x' && grid[1][1]=='x' && grid[2][0]=='x')
            return "A";

        if(grid[0][0]=='o' && grid[1][1]=='o' && grid[2][2]=='o')
            return "B";
        if(grid[0][2]=='o' && grid[1][1]=='o' && grid[2][0]=='o')
            return "B";
        

        if(moves.size() < 9)
        {
            return "Pending";
        }


        return "Draw";

    }
};