[20250901] BOJ / G5 / 꿀 따기 / 이강현

lkhyun/202509/01 BOJ G5 꿀 따기.md

@@ -0,0 +1,67 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static StringTokenizer st;
+    static int N;
+    static int[] original;
+    static long[] leftSum;
+    static long[] rightSum;
+    static long total;
+
+    public static void main(String[] args) throws IOException {
+        N = Integer.parseInt(br.readLine());
+
+        original = new int[N];
+        leftSum = new long[N];
+        rightSum = new long[N];
+
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++) {
+            original[i] = Integer.parseInt(st.nextToken());            
+        }
+
+        // 왼쪽에서 오른쪽으로
+        leftSum[0] = original[0];
+        for (int i = 1; i < N; i++) {
+            leftSum[i] = leftSum[i-1] + original[i];
+        }
+
+        // 오른쪽에서 왼쪽으로
+        rightSum[N-1] = original[N-1];
+        for (int i = N-2; i >= 0; i--) {
+            rightSum[i] = rightSum[i+1] + original[i];
+        }
+
+        total = leftSum[N-1];
+        long max = 0;
+
+        //벌통이 맨 오른쪽, 벌1이 맨 왼쪽 고정, 벌2 위치 선택
+        for (int i = 1; i < N-1; i++) {
+            long bee1 = total - original[0] - original[i];
+            long bee2 = total - leftSum[i];
+            max = Math.max(max, bee1 + bee2);
+        }
+
+        //벌통이 맨 왼쪽, 벌1이 맨 오른쪽 고정, 벌2 위치 선택  
+        for (int i = N-2; i > 0; i--) {
+            long bee1 = total - original[N-1] - original[i];
+            long bee2 = total - rightSum[i];
+            max = Math.max(max, bee1 + bee2);
+        }
+
+        //벌1이 맨 왼쪽, 벌2가 맨 오른쪽 고정, 벌통 위치 선택
+        for (int i = 1; i < N-1; i++) {
+            long bee1 = leftSum[i] - original[0];
+            long bee2 = rightSum[i] - original[N-1];
+            max = Math.max(max, bee1 + bee2);
+        }
+
+        bw.write(max + "");
+        bw.close();
+    }
+}
+```