121. Best Time to Buy and Sell Stock.java

class Solution {
    public int maxProfit(int[] prices) {
        
        int min = Integer.MAX_VALUE;
        int max = 0;
        for(int i = 0; i < prices.length; i++)
        {
            min = Math.min(prices[i], min);
            max = Math.max(prices[i] - min, max);
        }
        
       return max; 
    }
}