[20250916] BOJ / G5 / 전깃줄 / 이인희

LiiNi-coder/202509/16 BOJ 전깃줄.md

@@ -0,0 +1,33 @@
+```java
+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));
+        int N = Integer.parseInt(br.readLine());
+        int[][] wires = new int[N][2];
+
+        for (int i = 0; i < N; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            wires[i][0] = Integer.parseInt(st.nextToken());
+            wires[i][1] = Integer.parseInt(st.nextToken());
+        }
+
+        Arrays.sort(wires, (a, b) -> a[0] - b[0]); // a와 b는 wires배열의 원소로, 이들의 0번째 원소를 기준으로 소팅
+
+        int[] dp = new int[N];
+        int maxLen = 0;
+        for (int i = 0; i < N; i++) {
+            dp[i] = 1;
+            for (int j = 0; j < i; j++) {
+                if (wires[j][1] < wires[i][1]) {
+                    dp[i] = Math.max(dp[i], dp[j] + 1);
+                }
+            }
+            maxLen = Math.max(maxLen, dp[i]);
+        }
+        System.out.println(N - maxLen);
+    }
+}
+```