BOJ_2110 : 공유기 설치

week5/BOJ_2110(공유기 설치).java

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+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));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int N = Integer.parseInt(st.nextToken());
+        int C = Integer.parseInt(st.nextToken());
+
+        int[] house = new int[N];
+        for (int i = 0; i < N; i++) {
+            house[i] = Integer.parseInt(br.readLine());
+        }
+        Arrays.sort(house);
+        int left = 1;
+        int right = house[N - 1] - house[0];
+        int answer = 0;
+        while (left <= right) {
+            int mid = (left + right) / 2;
+            int index = 0;
+            int count = 1;
+            for (int i = 0; i < N; i++) {
+                if (house[i] - house[index] >= mid) {
+                    index = i;
+                    count++;
+                }
+            }
+            if (count < C) {
+                right = mid - 1;
+            } else {
+                answer = mid;
+                left = mid + 1;
+            }
+        }
+        System.out.println(answer);
+    }
+}