public class Solution {
public int maxProfit(int[] prices) {
int len = prices.length,
sum = 0,
i = 0;
for(;i < len - 1;i++) {
if(prices[i+1] > prices[i]) {
int delta = prices[i+1] - prices[i];
sum = sum + delta;
}
}
return sum;
}
}