121.Best time to buy and sell stock

class Solution {
    public int maxProfit(int[] prices) {
        int lowestcurrprice=prices[0];
        int max=Integer.MIN_VALUE;
        for(int i=1;i<prices.length;i++){
         if(lowestcurrprice<prices[i]){
            max=Math.max(max,prices[i]-lowestcurrprice);
         }
         else{
          lowestcurrprice=prices[i];
         }
        }
        return max==Integer.MIN_VALUE?0:max;
    }
}