Leetcode 1603

Easy question , you can use three int variable or array is faster and easier.

class ParkingSystem {
    int[] lot;
    public ParkingSystem(int big, int medium, int small) {
        lot = new int[]{big,medium,small};
    }
    
    public boolean addCar(int carType) {
        if(lot[carType - 1] == 0) return false;
        lot[carType - 1] --;
        return true;
    }
}

348

class TicTacToe {
    int[] rows,cols;
    int diagonal,antiDiagonal;

    public TicTacToe(int n) {
        rows = new int[n];
        cols = new int[n];
        diagonal = 0;
        antiDiagonal = 0;    
    }
    
    public int move(int row, int col, int player) {
        int n = rows.length;
        // determine the mark by player 
        int mark = (player == 1) ? 1 : -1;
        // mark the row and col 
        rows[row] += mark;
        cols[col] += mark;
        // mark the diagonal or antiDiagonal if applies
        if(row == col) diagonal += mark;
        if(col == (n - row - 1)) antiDiagonal += mark;
        // if any row or col scores n that means our new mark connected a row col diagonal or antiDiagonal;
        if(Math.abs(rows[row]) == n|| Math.abs(cols[col]) == n || Math.abs(diagonal) == n || Math.abs(antiDiagonal)  == n) return player;
        // no winer
        return 0;
    }
}

/**
 * Your TicTacToe object will be instantiated and called as such:
 * TicTacToe obj = new TicTacToe(n);
 * int param_1 = obj.move(row,col,player);
 */