[20250708] BOJ / G2 / 공항 / 이강현

Author: lkhyun

lkhyun/202507/8 BOJ G2 공항.md

@@ -0,0 +1,42 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main{
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static int G,P;
+    static int[] nextBlank;
+    static int count = 0;
+    public static void main(String[] args) throws Exception{
+        G = Integer.parseInt(br.readLine());
+        P = Integer.parseInt(br.readLine());
+        nextBlank = new int[G+1]; //빈 공간 가리키기
+        
+        for (int i = 1; i <= G; i++) {
+            nextBlank[i] = i;
+        }
+
+        for (int i = 1; i <= P; i++) {
+            int gi = Integer.parseInt(br.readLine());
+            int blank = find(gi); //빈 공간 찾기
+            if(blank == 0){
+                break;
+            }else{
+                count++;
+                nextBlank[blank] = nextBlank[blank-1];
+            }
+        }
+        
+        bw.write(String.valueOf(count));
+        bw.close();
+    }
+    static int find(int gi){
+        if(nextBlank[gi] == gi){
+            return gi;
+        }else{
+            return nextBlank[gi] = find(nextBlank[gi]);
+        }
+    }
+}
+```