[Week2] 박서윤: ATM, H-Index, 가장 큰 수, 이건 꼭 풀어야 해!, 줄 세우기

src/1week/seoyoon/FindingPrimeNum.kt

@@ -1,6 +1,6 @@
 import kotlin.math.sqrt
 
-class Solution {
+class Week1SYSolution {
     var visited = BooleanArray(7, {false})
     val set: MutableSet<Int> = mutableSetOf()
     var depth: Int = 0

src/1week/seoyoon/MaximizeDiff.kt

@@ -1,15 +1,15 @@
-val n = readln().toInt()
-val arr = readln().split(" ").map{it.toInt()}.toIntArray()
-var newArr = IntArray(n)
-var visited = BooleanArray(n, {false})
-var max: Int = Int.MIN_VALUE
-
 fun main() {
     permutation(0)
-    println(max)
 }
 
-fun permutation(depth: Int) {
+fun permutation(depth: Int): Int {
+    val n = readln().toInt()
+    val arr = readln().split(" ").map{it.toInt()}.toIntArray()
+    var newArr = IntArray(n)
+    var visited = BooleanArray(n, {false})
+    var max: Int = Int.MIN_VALUE
+
+
     if (depth == n) {
         var sum = 0;
         for (i in 0 until n-1) {
@@ -29,4 +29,5 @@ fun permutation(depth: Int) {
             visited[i] = false
         }
     }
-}
+    return max
+}

src/1week/seoyoon/Minecraft.kt

@@ -46,4 +46,4 @@ fun solution(n: Int, m: Int, b: Int, ground: Array<IntArray>, high: Int, low: In
         }
     }
     print("$ansSec $ansHigh")
-}
+}

src/1week/seoyoon/PressKeypad.kt

@@ -1,45 +1,43 @@
 import java.lang.Math.abs
 
-class MySolution {
-    fun solution(numbers: IntArray, hand: String): String {
-        var answer = ""
-        var LCur: Int = 10
-        var RCur: Int = 12
+fun solution(numbers: IntArray, hand: String): String {
+    var answer = ""
+    var LCur: Int = 10
+    var RCur: Int = 12
 
-        for (i in 0 until numbers.size) {
-            if (numbers[i] == 0) numbers[i] = 11
+    for (i in 0 until numbers.size) {
+        if (numbers[i] == 0) numbers[i] = 11
 
-            if (numbers[i] == 1 || numbers[i] == 4 || numbers[i] == 7) {
+        if (numbers[i] == 1 || numbers[i] == 4 || numbers[i] == 7) {
+            answer += "L"
+            LCur = numbers[i]
+        }
+        else if (numbers[i] == 3 || numbers[i] == 6 || numbers[i] == 9) {
+            answer += "R"
+            RCur = numbers[i]
+        }
+        else {
+            var LDis = abs(numbers[i] - LCur)/3 + abs(numbers[i] - LCur)%3
+            var RDis = abs(numbers[i] - RCur)/3 + abs(numbers[i] - RCur)%3
+
+            if (LDis < RDis) {
                 answer += "L"
                 LCur = numbers[i]
             }
-            else if (numbers[i] == 3 || numbers[i] == 6 || numbers[i] == 9) {
+            else if (RDis < LDis) {
                 answer += "R"
                 RCur = numbers[i]
             }
             else {
-                var LDis = abs(numbers[i] - LCur)/3 + abs(numbers[i] - LCur)%3
-                var RDis = abs(numbers[i] - RCur)/3 + abs(numbers[i] - RCur)%3
-
-                if (LDis < RDis) {
-                    answer += "L"
-                    LCur = numbers[i]
-                }
-                else if (RDis < LDis) {
+                if (hand == "right") {
                     answer += "R"
                     RCur = numbers[i]
-                }
-                else {
-                    if (hand == "right") {
-                        answer += "R"
-                        RCur = numbers[i]
-                    } else {
-                        answer += "L"
-                        LCur = numbers[i]
-                    }
+                } else {
+                    answer += "L"
+                    LCur = numbers[i]
                 }
             }
         }
-        return answer
     }
-}
+    return answer
+}

src/1week/seoyoon/QuitTheJob.kt

@@ -6,17 +6,17 @@ fun main() {
     val P = IntArray(n + 1)
     val arr = IntArray(n + 2)
 
-    for (i in 1 .. n) {
-        val input = readln().split(" ").map{it.toInt()}
+    for (i in 1..n) {
+        val input = readln().split(" ").map { it.toInt() }
         T[i] = input[0]
         P[i] = input[1]
     }
 
-    for (i in 1 .. n) {
+    for (i in 1..n) {
         if (i + T[i] <= n + 1) {
             arr[i + T[i]] = max(arr[i + T[i]], arr[i] + P[i])
         }
         arr[i + 1] = max(arr[i + 1], arr[i])
     }
     println(arr[n + 1])
-}
+}

src/1week/seoyoon/SumOfSubsequences.kt

@@ -1,10 +1,10 @@
-var ans:Int = 0
+var ans: Int = 0
 
 fun main() {
-    val (n, s) = readln().split(" ").map{it.toInt()}
-    val arr = readln().split(" ").map{it.toInt()}.toIntArray()
+    val (n, s) = readln().split(" ").map { it.toInt() }
+    val arr = readln().split(" ").map { it.toInt() }.toIntArray()
 
-    subSum(n, s, arr,0, 0, 0)
+    subSum(n, s, arr, 0, 0, 0)
 
     if (s == 0) {
         ans--

src/2week/seoyoon/ATM.kt

@@ -0,0 +1,20 @@
+package `2week`.seoyoon
+
+fun solution(n: Int, arr: IntArray): Int {
+    var ans = 0
+    arr.sort()
+
+    for (i in 0 until n) {
+        for (j in 0..i) {
+            ans += arr[j]
+        }
+    }
+    return ans
+}
+
+fun main() {
+    val n = Integer.parseInt(readln())
+    val arr = readln().split(" ").map { it.toInt() }.toIntArray()
+    println(solution(n, arr))
+}
+

src/2week/seoyoon/H-Index.kt

@@ -0,0 +1,15 @@
+package `2week`.seoyoon
+
+import java.lang.Integer.max
+import java.lang.Integer.min
+
+fun solution(citations: IntArray): Int {
+    var answer = 0
+    citations.sort()
+
+    for (i in 0 until citations.size) {
+        var min = min(citations[i], citations.size - i)
+        answer = max(min, answer)
+    }
+    return answer
+}

src/2week/seoyoon/가장 큰 수.kt

@@ -0,0 +1,14 @@
+package `2week`.seoyoon
+
+fun main() {
+    val arr = intArrayOf(6, 10, 2)
+    println(solution(arr))
+}
+
+fun solution(numbers: IntArray): String {
+    var answer = ""
+    numbers.sortedWith(Comparator { o1, o2 -> "$o2$o1".compareTo("$o1$o2") })
+        .forEach { answer += it }
+
+    return if (answer.startsWith("0")) "0" else answer
+}

src/2week/seoyoon/이건 꼭 풀어야 해!.kt

@@ -0,0 +1,36 @@
+package `2week`.seoyoon
+
+import java.util.*
+
+fun solution(n: Int, q: Int, arrA: IntArray, arrB: Array<IntArray>) {
+    val sumArr = IntArray(n)
+    arrA.sort()
+    sumArr[0] = arrA[0]
+
+    for (i in 1 until n) {
+        sumArr[i] = sumArr[i - 1] + arrA[i]
+    }
+
+    for (i in 0 until q) {
+        if (arrB[i][0] == 1 || arrB[i][1] == 1) {
+            println(sumArr[arrB[i][1] - 1])
+        }
+        else {
+            println(sumArr[arrB[i][1] - 1] - sumArr[arrB[i][0] - 1 - 1])
+        }
+    }
+}
+
+fun main() {
+    val (n, q) = readln().split(" ").map{it.toInt()}
+    val arrA = readln().split(" ").map { it.toInt() }.toIntArray()
+    val arrB = Array(q, {IntArray(2)})
+
+    for (i in 0 until q) {
+        val st = StringTokenizer(readln())
+        arrB[i][0] = Integer.parseInt(st.nextToken())
+        arrB[i][1] = Integer.parseInt(st.nextToken())
+    }
+
+    solution(n, q, arrA, arrB)
+}

src/2week/seoyoon/줄 세우기.kt

@@ -0,0 +1,46 @@
+package `2week`.seoyoon
+
+import java.util.*
+
+fun main() {
+    val (n, m) = readln().split(" ").map{it.toInt()}
+    var degree = IntArray(n+1)
+
+    val graph : Array<ArrayList<Int>> = Array(n+1){ ArrayList() }
+    for (i in 1..n) {
+        graph[i] = ArrayList()
+    }
+
+    for (i in 1 .. m) {
+        val (A, B) = readln().split(" ").map{it.toInt()}
+
+        graph[A].add(B)
+        degree[B]++
+    }
+
+    val queue: Queue<Int> = LinkedList()
+    val result: Queue<Int> = LinkedList()
+
+    for (i in 1..n) {
+        if (degree[i] == 0) {
+            queue.offer(i)
+        }
+    }
+
+    while (!queue.isEmpty()) {
+        val node = queue.poll()
+        result.offer(node)
+
+        for (i in graph[node]) {
+            degree[i]--
+
+            if (degree[i] == 0) {
+                queue.offer(i)
+            }
+        }
+    }
+
+    for (i in result) {
+        print("$i ")
+    }
+}