[LeetCode]122 Best Time to Buy and Sell Stock II

public class Solution {

public int maxProfit(int[] prices) {

// If as many transactions
// Gready

int pro = 0;
int buy = 0;
boolean hold = false;

int len = prices.length;

for (int i = 0 ; i < len ; i ++)
{
if (!hold)
{
// Find the next buy day
if (i + 1 < len && prices[i + 1] > prices[i])
{
buy = prices[i];
hold = true;
}
}
else
{
// Find the next sell day
if ((i == len - 1) || // Last day, sell whatever we have
(i + 1 < len && prices[i + 1] < prices[i])) // A good sell day.
{
pro += prices[i] - buy;
hold = false;
}
}
}

return pro;
}
}