Solution to Best Time to Buy and Sell Stock 2 Problem. Watch this video for more detailed explanation.

class Solution {
    public int maxProfit(int[] prices) {
        if(prices == null || prices.length == 0)
            return 0;
        
        int profit = 0;
        for(int i=0;i<prices.length-1;i++) {
            if(prices[i+1] > prices[i]) {
                profit += prices[i+1] - prices[i];
            }
        }
        
        return profit;
    }
}