122. Best Time to Buy and Sell S

这题可以不限次数交易，因此前后比较只要>0就累加入总收入里面

int maxProfit(int* prices, int pricesSize) {
    int sum = 0;
    int i = 0;
    for(i = 1; i < pricesSize; i++){
        if(prices[i]-prices[i-1] > 0)
            sum += prices[i]-prices[i-1];
    }
    
    return sum;
}