LeetCode/com/zerroi/leetcode/Three27/DailyTemperatures.java

package com.zerroi.leetcode.Three27;

import java.util.Stack;

public class DailyTemperatures {
    public static void main(String[] args) {
        SolutionFirst solutionFirst = new SolutionFirst();
        int[] res = solutionFirst.dailyTemperatures(new int[]{55, 38, 53, 81, 61, 93, 97, 32, 43, 78});
    }
}

class SolutionFirst {
    public int[] dailyTemperatures(int[] temperatures) {
        int[] next = new int[temperatures.length];
        for (int i = 0; i < temperatures.length - 1; i++) {
            int top = temperatures[i];
            int index = i + 1;
            if (temperatures[i + 1] > top) {
                next[i]++;
            } else {
                boolean flag = false;
                while (index < temperatures.length) {
                    if (temperatures[index] > top) {
                        flag = true;
                        break;
                    }
                    index++;
                    if (index > 200) {
                        break;
                    }
                }
                if (flag) {
                    next[i] = index - i;
                } else {
                    next[i] = 0;
                }
            }
        }
        return next;
    }

    public int[] dailyTemperatures2(int[] temperatures) {
        int[] next = new int[temperatures.length];
        Stack<Integer> stack = new Stack<>();

        for (int i = 0; i < temperatures.length; i++) {
            while (!stack.isEmpty() && temperatures[i] > temperatures[stack.peek()]) {
                int prevIndex = stack.pop();
                next[prevIndex] = i - prevIndex;
            }
            stack.push(i);
        }

        return next;
    }
}