[LintCode] Best Time to Buy and Sell Stock II

public int maxProfit(int[] prices) {
        // write your code here
        int max = 0;
        for(int i = 1; i < prices.length; i++) {
            if(prices[i] - prices[i-1] > 0)
                max += prices[i] - prices[i-1]; 
        }
        return max;
    }