Week4

Lv.1/기사단원의 무기.kt

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+package Lv.`1`
+
+class Solution4 {
+    fun solution(number: Int, limit: Int, power: Int): Int {
+        var answer: Int = 0
+
+        for (i in 1..number) {
+            var divisorCount = 0
+
+            for (j in 1..Math.sqrt(i.toDouble()).toInt()) {
+                if (i % j == 0) {
+                    divisorCount += 1
+                    if (j != i / j) {
+                        divisorCount += 1
+                    }
+                }
+            }
+
+            if (divisorCount > limit) {
+                answer += power
+            } else {
+                answer += divisorCount
+            }
+        }
+
+        return answer
+    }
+}

Lv.1/동영상 재생기.kt

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+package Lv.`1`
+
+class Solution5 {
+    fun solution(videoLen: String, pos: String, opStart: String, opEnd: String, commands: Array<String>): String {
+        fun timeToSeconds(time: String): Int {
+            val parts = time.split(":")
+            return parts[0].toInt() * 60 + parts[1].toInt()
+        }
+
+        fun secondsToTime(seconds: Int): String {
+            val minutes = seconds / 60
+            val secs = seconds % 60
+            return String.format("%02d:%02d", minutes, secs)
+        }
+
+        val videoLength = timeToSeconds(videoLen)
+        val openingStart = timeToSeconds(opStart)
+        val openingEnd = timeToSeconds(opEnd)
+        var currentPosition = timeToSeconds(pos)
+
+        if (currentPosition in openingStart..openingEnd) {
+            currentPosition = openingEnd
+        }
+
+        for (command in commands) {
+            when (command) {
+                "prev" -> {
+                    currentPosition = (currentPosition - 10).coerceAtLeast(0)
+                }
+                "next" -> {
+                    currentPosition = (currentPosition + 10).coerceAtMost(videoLength)
+                }
+            }
+
+            if (currentPosition in openingStart..openingEnd) {
+                currentPosition = openingEnd
+            }
+        }
+
+        return secondsToTime(currentPosition)
+    }
+}

Lv.2/이진 변환 반복하기.kt

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+package Lv.`2`
+
+class Solution {
+    fun solution(s: String): IntArray {
+        var count = 0
+        var zeroCount = 0
+        var currentString = s
+
+        while (currentString != "1") {
+            val zeros = currentString.count { it == '0' }
+            zeroCount += zeros
+
+            val length = currentString.length - zeros
+
+            currentString = Integer.toBinaryString(length)
+
+            count++
+        }
+
+        return intArrayOf(count, zeroCount)
+    }
+}