[장희직] - 알고스팟, A와 B 2, 입국심사, 회장뽑기

src/main/kotlin/heejik/47week/A와 B 2.kt

@@ -0,0 +1,37 @@
+package heejik.`47week`
+
+class `A와 B 2` {
+
+    fun solve() {
+        val s = readln()
+        val t = readln()
+        val queue = ArrayDeque<String>()
+        queue.add(t)
+
+        while (queue.isNotEmpty()) {
+            val nowString = queue.removeFirst()
+            if (nowString.length == s.length) {
+                if (nowString == s) {
+                    println(1)
+                    return
+                }
+                continue
+            }
+
+            if (nowString.last() == 'A') {
+                queue.add(nowString.dropLast(1))
+            }
+
+            if (nowString.first() == 'B') {
+                queue.add(nowString.reversed().dropLast(1))
+            }
+        }
+
+
+        println(0)
+    }
+}
+
+fun main() {
+    `A와 B 2`().solve()
+}

src/main/kotlin/heejik/47week/알고스팟.kt

@@ -0,0 +1,64 @@
+package heejik.`47week`
+
+import kotlin.properties.Delegates
+
+class 알고스팟 {
+
+    data class Pos(
+        val x: Int,
+        val y: Int
+    )
+
+    val dx = listOf(1, -1, 0, 0)
+    val dy = listOf(0, 0, 1, -1)
+
+    var m by Delegates.notNull<Int>()
+    var n by Delegates.notNull<Int>()
+    private val maze = mutableListOf<List<Int>>()
+    lateinit var visited: List<MutableList<Boolean>>
+
+    fun solve() {
+        readln().split(' ').map { it.toInt() }.run {
+            n = this[0]
+            m = this[1]
+        }
+        visited = MutableList(m) { MutableList(n) { false } }
+
+        repeat(m) {
+            maze.add(readln().toList().map { it.digitToInt() })
+        }
+
+        findAnswer().run { println(this) }
+    }
+
+    private fun findAnswer(): Int {
+        val dequeue = ArrayDeque<Pair<Pos, Int>>()
+        dequeue.add(Pos(0, 0) to 0)
+
+        while (dequeue.isNotEmpty()) {
+            val (pos, count) = dequeue.removeFirst()
+
+            if (pos.x == m - 1 && pos.y == n - 1) {
+                return count
+            }
+
+            for (i in 0 until 4) {
+                val nx = pos.x + dx[i]
+                val ny = pos.y + dy[i]
+                if (nx in 0 until m && ny in 0 until n) {
+                    if (visited[nx][ny].not()) {
+                        if (maze[nx][ny] == 0) dequeue.addFirst(Pos(nx, ny) to count)
+                        if (maze[nx][ny] == 1) dequeue.addLast(Pos(nx, ny) to count + 1)
+                        visited[nx][ny] = true
+                    }
+                }
+            }
+        }
+
+        return Int.MAX_VALUE
+    }
+}
+
+fun main() {
+    알고스팟().solve()
+}

src/main/kotlin/heejik/47week/입국심사.kt

@@ -0,0 +1,22 @@
+package heejik.`47week`
+
+class 입국심사 {
+    fun solution(n: Int, times: IntArray): Long {
+        var minTime : Long = 1L
+        var maxTime : Long = times.maxOrNull()!!.toLong() * n
+
+        while (minTime <= maxTime) {
+            val midTime = (minTime + maxTime) / 2
+
+            var count = 0L
+            times.forEach { time -> count += midTime / time }
+
+            if (count >= n) {
+                maxTime = midTime - 1
+            } else {
+                minTime = midTime + 1
+            }
+        }
+        return minTime
+    }
+}

src/main/kotlin/heejik/47week/회장뽑기.kt

@@ -0,0 +1,46 @@
+package heejik.`47week`
+
+import kotlin.math.min
+
+class 회장뽑기 {
+
+    fun solve() {
+        val n = readln().toInt()
+        val board = MutableList(n + 1) { MutableList(n + 1) { Int.MAX_VALUE } }
+        repeat(n + 1) {
+            board[it][it] = 0
+        }
+
+        while (true) {
+            val (a, b) = readln().split(' ').map { it.toInt() }
+            if (a == -1) break
+            board[a][b] = 1
+            board[b][a] = 1
+        }
+
+
+        for (k in 1..n) {
+            for (i in 1..n) {
+                for (j in 1..n) {
+                    if (board[i][k] == Int.MAX_VALUE || board[k][j] == Int.MAX_VALUE) continue
+                    board[i][j] = min(board[i][j], board[i][k] + board[k][j])
+                }
+            }
+        }
+
+        val minScore = board.drop(1).minOf { it.filter { it != Int.MAX_VALUE }.max() }
+        val candidates = mutableListOf<Int>()
+
+        board.forEachIndexed { index, ints ->
+            if (ints.filter { it != Int.MAX_VALUE }.max() == minScore)
+                candidates.add(index)
+        }
+        println("$minScore ${candidates.count()}")
+        println(candidates.joinToString(" "))
+    }
+}
+
+
+fun main() {
+    회장뽑기().solve()
+}