[20250807] BOJ / G5 / 컨베이어 벨트 위의 로봇 / 이강현

Author: lkhyun

lkhyun/202508/07 BOJ G5 컨베이어 벨트 위의 로봇.md

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+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        
+        int N = Integer.parseInt(st.nextToken());
+        int K = Integer.parseInt(st.nextToken());
+        
+        int[] belt = new int[2 * N];
+        boolean[] robot = new boolean[2 * N];
+        
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < 2 * N; i++) {
+            belt[i] = Integer.parseInt(st.nextToken());
+        }
+        
+        int step = 0;
+        
+        while (true) {
+            step++;
+            
+            int tempBelt = belt[2 * N - 1];
+            boolean tempRobot = robot[2 * N - 1];
+            
+            for (int i = 2 * N - 1; i > 0; i--) {
+                belt[i] = belt[i - 1];
+                robot[i] = robot[i - 1];
+            }
+            
+            belt[0] = tempBelt;
+            robot[0] = tempRobot;
+
+            if (robot[N - 1]) {
+                robot[N - 1] = false;
+            }
+            
+            for (int i = N - 2; i >= 0; i--) {
+                if (robot[i] && !robot[i + 1] && belt[i + 1] > 0) {
+                    robot[i] = false;
+                    robot[i + 1] = true;
+                    belt[i + 1]--;
+                    
+                    if (i + 1 == N - 1) {
+                        robot[i + 1] = false;
+                    }
+                }
+            }
+            
+            if (!robot[0] && belt[0] > 0) {
+                robot[0] = true;
+                belt[0]--;
+            }
+            
+            int zeroCount = 0;
+            for (int i = 0; i < 2 * N; i++) {
+                if (belt[i] == 0) {
+                    zeroCount++;
+                }
+            }
+            
+            if (zeroCount >= K) {
+                break;
+            }
+        }
+        
+        bw.write(step+"");
+        bw.close();
+    }
+}
+```