[Week7] 문제풀이

week7/week7_1/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

week7/week7_1/src/main/kotlin/Main.kt

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+import java.util.Arrays
+import java.util.LinkedList
+import java.util.Queue
+import kotlin.concurrent.fixedRateTimer
+
+val vertical = arrayOf(2, -2, 1 , -1, 1, -1, -2, 2)
+val horizontal = arrayOf(1, -1, 2, -2, -2, 2, 1, -1)
+lateinit var resultArray: Array<Int>
+
+
+fun main() {
+    val L = readLine()?.toInt() ?: return
+    resultArray = Array(L){ 0 }
+
+    for(i in 0 until L){
+        val n = readLine()?.toInt() ?: return
+        val chess = Array(n){Array(n){0}}
+        val (startX, startY) = readLine()?.split(" ")?.map { it.toInt() } ?: return
+        val (endX, endY) = readLine()?. split(" ")?.map { it.toInt() } ?: return
+
+        resultArray[i] = bfs(chess, startX, startY, endX, endY, n)
+    }
+    resultArray.forEach {it->
+        println(it)
+    }
+}
+
+fun bfs(chess: Array<Array<Int>>, startX: Int, startY: Int, endX: Int, endY: Int, n: Int): Int{
+    val queue: Queue<Pair<Int, Int>> = LinkedList<Pair<Int, Int>>()
+    queue.offer(Pair(startX, startY))
+    chess[startX][startY] = 1
+    var cnt = 0
+
+    while (queue.isNotEmpty()) {
+        val queueSize = queue.size
+
+        for(i in 0 until queueSize){
+            val index = queue.poll()
+            if (index.first == endX && index.second == endY) {
+                return cnt
+            }
+
+            for (j in 0 until 8) {
+                val curX: Int = index.first + vertical[j]
+                val curY: Int = index.second + horizontal[j]
+
+                if (isValidPosition(n, curX, curY) && chess[curX][curY] == 0) {
+                    chess[curX][curY] = 1
+                    queue.offer(Pair(curX, curY))
+                }
+            }
+        }
+        cnt++
+    }
+    return -1
+}
+
+fun isValidPosition(n: Int, x: Int, y: Int): Boolean{
+    return x in 0 until n && y in 0 until n
+}

week7/week7_1/week7_1.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/kotlin" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/kotlin" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/resources" type="java-test-resource" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
+  </component>
+</module>

week7/week7_2/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

week7/week7_2/src/main/kotlin/Main.kt

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+import java.util.LinkedList
+import java.util.Queue
+import java.util.Scanner
+import java.util.StringTokenizer
+import kotlin.properties.Delegates
+
+lateinit var connected: Array<Array<Int>>
+lateinit var dfsVisited: Array<Boolean>
+lateinit var visited: Array<Array<Boolean>>
+lateinit var apart: Array<Int>
+val dx = arrayOf(0, 0, 1, -1)
+val dy = arrayOf(1, -1, 0, 0)
+var appartNum = 0
+var N = 0
+
+
+fun main() {
+    N = readLine()?.toInt() ?: return
+    val scanner = Scanner(System.`in`)
+    connected = Array(N){ Array(N) { 0 } }
+    visited = Array(N){ Array(N) { false } }
+    apart = Array(N*N){ 0 }
+
+    for(i in 0 until N){
+        val input = readLine()
+        for(j in 0 until N){
+            connected[i][j] = input?.get(j)?.toString()?.toInt() ?: 0
+        }
+    }
+
+    for(i in 0 until N){
+        for(j in 0 until N){
+            if(connected[i][j] == 1 && !visited[i][j]){
+                appartNum++
+                BFS(i, j)
+            }
+        }
+    }
+
+    apart.sort()
+    println("$appartNum")
+
+    apart.forEach { v->
+        if(v != 0) println(v)
+    }
+
+}
+
+fun BFS(x : Int, y : Int){
+    val q: Queue<IntArray> = LinkedList()
+    q.add(intArrayOf(x, y))
+    visited[x][y] = true
+    apart[appartNum]++
+
+    while(!q.isEmpty()){
+        val curX = q.peek()[0]
+        val curY = q.peek()[1]
+        q.poll()
+
+        for(i in 0 until 4){
+            val nx = curX + dx[i]
+            val ny = curY + dy[i]
+
+            if(nx >= 0 && ny >= 0 && nx < N && ny < N){
+                if(connected[nx][ny] == 1 && !visited[nx][ny]){
+                    q.add(intArrayOf(nx, ny))
+                    visited[nx][ny] = true
+                    apart[appartNum]++
+                }
+            }
+        }
+    }
+}

week7/week7_2/week7_2.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/kotlin" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/kotlin" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/resources" type="java-test-resource" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
+  </component>
+</module>