122. Best Time to Buy and Sell Stock II.java

class Solution {
    public int maxProfit(int[] prices) {

        if (prices == null || prices.length <= 1) {
            return 0;
        }

        int profit = 0;
        for(int i=1;i<prices.length;i++)
        {
            if(prices[i-1]<prices[i])
            {
                profit = profit + (prices[i]-prices[i-1]);
            }
        }
        return profit;

    }
}