LeetCode/java/final-prices-with-a-special-discount-in-a-shop.java

class Solution {
  public int[] finalPrices(int[] prices) {
    int[] result = prices.clone();

    var stack = new Stack<Integer>();
    for (int i = 0; i < prices.length; ++i) {
      while (!stack.isEmpty() && prices[stack.peek()] >= prices[i]) {
        result[stack.pop()] -= prices[i];
      }

      stack.add(i);
    }

    return result;
  }
}