LeetCode-in-Swift
739. Daily Temperatures
Medium
Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the ith day to get a warmer temperature. If there is no future day for which this is possible, keep answer[i] == 0 instead.
Example 1:
Input: temperatures = [73,74,75,71,69,72,76,73]
Output: [1,1,4,2,1,1,0,0]
Example 2:
Input: temperatures = [30,40,50,60]
Output: [1,1,1,0]
Example 3:
Input: temperatures = [30,60,90]
Output: [1,1,0]
Constraints:
1 <= temperatures.length <= 10530 <= temperatures[i] <= 100
Solution
class Solution {
func dailyTemperatures(_ temperatures: [Int]) -> [Int] {
var sol = [Int](repeating: 0, count: temperatures.count)
sol[temperatures.count - 1] = 0
for i in (0..<sol.count - 1).reversed() {
var j = i + 1
while j < sol.count {
if temperatures[i] < temperatures[j] {
sol[i] = j - i
break
} else {
if sol[j] == 0 {
break
}
j += sol[j]
}
}
}
return sol
}
}