[20250717] BOJ / G4 / 공유기 설치 / 이인희

LiiNi-coder/202507/17 BOJ 공유기 설치.md

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+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+public class B2110 {
+	private static BufferedReader br;
+	private static int n;
+	private static int c;
+	private static int[] houses;
+
+	public static void main(String[] args) throws IOException {
+		br = new BufferedReader(new InputStreamReader(System.in));
+		String[] temp = br.readLine().split(" ");
+		n = Integer.parseInt(temp[0]);
+		c = Integer.parseInt(temp[1]);
+
+		houses = new int[n];
+		for (int i = 0; i < n; i++) {
+			houses[i] = Integer.parseInt(br.readLine());
+		}
+
+		Arrays.sort(houses);
+
+		int left = 1;
+		int right = houses[n - 1] - houses[0];
+		int answer = 0;
+
+		while (left <= right) {
+			int mid = (left + right) / 2;
+			if (canInstall(mid)) {
+				answer = mid;
+				left = mid + 1;
+			} else {
+				right = mid - 1;
+			}
+		}
+
+		System.out.println(answer);
+	}
+
+	private static boolean canInstall(int minDist) {
+		int count = 1;
+		int lastInstalled = houses[0];
+		for (int i = 1; i < n; i++) {
+			if (houses[i] - lastInstalled >= minDist) {
+				count++;
+				lastInstalled = houses[i];
+			}
+		}
+		return count >= c;
+	}
+}
+```