[20251126] BOJ / G5 / 행복 유치원 / 이준희

Author: JHLEE325

JHLEE325/202511/26 BOJ G5 행복 유치원.md

@@ -0,0 +1,33 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        
+        int N = Integer.parseInt(st.nextToken());
+        int K = Integer.parseInt(st.nextToken());
+
+        int[] arr = new int[N];
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++)
+            arr[i] = Integer.parseInt(st.nextToken());
+
+        int[] diff = new int[N - 1];
+        for (int i = 0; i < N - 1; i++) {
+            diff[i] = arr[i + 1] - arr[i];
+        }
+
+        Arrays.sort(diff);
+
+        int answer = 0;
+        for (int i = 0; i < N - K; i++) {
+            answer += diff[i];
+        }
+
+        System.out.println(answer);
+    }
+}
+```