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