[20251115] BOJ / G4 / 구간 나누기 2 / 설진영

Seol-JY/202511/15 BOJ G4 구간 나누기 2.md

@@ -0,0 +1,68 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int N, M;
+    static int[] arr;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+
+        arr = new int[N];
+        st = new StringTokenizer(br.readLine());
+
+        int maxVal = 0;
+        int minVal = Integer.MAX_VALUE;
+
+        for (int i = 0; i < N; i++) {
+            arr[i] = Integer.parseInt(st.nextToken());
+            maxVal = Math.max(maxVal, arr[i]);
+            minVal = Math.min(minVal, arr[i]);
+        }
+
+        int left = 0;
+        int right = maxVal - minVal;
+        int answer = right;
+
+        while (left <= right) {
+            int mid = (left + right) / 2;
+
+            if (canDivide(mid)) {
+                answer = mid;
+                right = mid - 1;
+            } else {
+                left = mid + 1;
+            }
+        }
+
+        System.out.println(answer);
+    }
+
+    static boolean canDivide(int maxScore) {
+        int sections = 1;
+        int minInSection = arr[0];
+        int maxInSection = arr[0];
+
+        for (int i = 1; i < N; i++) {
+            int newMin = Math.min(minInSection, arr[i]);
+            int newMax = Math.max(maxInSection, arr[i]);
+
+            if (newMax - newMin > maxScore) {
+                sections++;
+                minInSection = arr[i];
+                maxInSection = arr[i];
+            } else {
+                minInSection = newMin;
+                maxInSection = newMax;
+            }
+        }
+
+        return sections <= M;
+    }
+}
+```