739.Daily Temperatures

https://leetcode.com/problems/daily-temperatures/solution/[
](https://leetcode.com/problems/daily-temperatures/description/)1-Using Stack

class Solution {
    public int[] dailyTemperatures(int[] temperatures) {
        int[] ans = new int[temperatures.length];
        Deque<Integer> stack = new ArrayDeque<>();
        for(int i = temperatures.length - 1; i >= 0; i--){
            while(!stack.isEmpty() && temperatures[i] >= temperatures[stack.peek()]){
                stack.pop();
            }
            ans[i] = stack.isEmpty() ? 0 : stack.peek() - i;
            stack.push(i);
        }
        return ans;
    }
}