# 121.BestTimetoBuyandSellStock

// https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock/

/**
 * @param {number[]} prices
 * @return {number}
 */
var maxProfit = function(prices) {
  var ans = 0;
  var len = prices.length;
  var minn = Infinity;
  for (var i = 0; i < len; i++) {
    minn = Math.min(minn, prices[i]);
    ans = Math.max(ans, prices[i] - minn);
  }
  return ans;
};