LeetCode in Kotlin
3894. Traffic Signal Color
Easy
You are given an integer timer representing the remaining time (in seconds) on a traffic signal.
The signal follows these rules:
- If
timer == 0, the signal is"Green" - If
timer == 30, the signal is"Orange" - If
30 < timer <= 90, the signal is"Red"
Return the current state of the signal. If none of the above conditions are met, return "Invalid".
Example 1:
Input: timer = 60
Output: “Red”
Explanation:
Since timer = 60, and 30 < timer <= 90, the answer is "Red".
Example 2:
Input: timer = 5
Output: “Invalid”
Explanation:
Since timer = 5, it does not satisfy any of the given conditions, the answer is "Invalid".
Constraints:
0 <= timer <= 1000
Solution
class Solution {
fun trafficSignal(timer: Int): String {
if (timer in 31..90) {
return "Red"
} else if (timer == 0) {
return "Green"
} else if (timer == 30) {
return "Orange"
}
return "Invalid"
}
}