class Solution {
    public int[] dailyTemperatures(int[] temperatures) {
        Deque<Integer> sta = new LinkedList<>();
        int[] res = new int[temperatures.length];
        for(int i = 0 ; i < temperatures.length;i++){
            while(!sta.isEmpty() && temperatures[sta.peekLast()] < temperatures[i]){
                int index = sta.pollLast();
                res[index] = i-index; 
            }
            sta.addLast(i);
        }
        return res;
    }
}