Best Time to Buy and Sell Stock.cpp

class Solution {
public:
    int maxProfit(vector<int>& prices) {
        int buy=prices[0],profit=0;
        
        for(int i=1;i<prices.size();i++){
            
            buy=min(buy,prices[i]);
            profit=max(profit,prices[i]-buy);
    }
        
        return profit;
    }
};