From 0d5dd4d8b868136a56ef3aeb1d16b966091e2a14 Mon Sep 17 00:00:00 2001 From: Ukj0ng <90972240+Ukj0ng@users.noreply.github.com> Date: Thu, 11 Dec 2025 18:39:22 +0900 Subject: [PATCH] =?UTF-8?q?[20251211]=20BOJ=20/=20G5=20/=20=EC=A0=84?= =?UTF-8?q?=EA=B9=83=EC=A4=84=20/=20=ED=95=9C=EC=A2=85=EC=9A=B1?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...5 \354\240\204\352\271\203\354\244\204.md" | 73 +++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 "Ukj0ng/202512/11 BOJ G5 \354\240\204\352\271\203\354\244\204.md" diff --git "a/Ukj0ng/202512/11 BOJ G5 \354\240\204\352\271\203\354\244\204.md" "b/Ukj0ng/202512/11 BOJ G5 \354\240\204\352\271\203\354\244\204.md" new file mode 100644 index 00000000..f8122144 --- /dev/null +++ "b/Ukj0ng/202512/11 BOJ G5 \354\240\204\352\271\203\354\244\204.md" @@ -0,0 +1,73 @@ +``` +import java.io.*; +import java.util.*; + +public class Main { + private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); + private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); + private static int[][] arr; + private static int[] memo; + private static int N; + + public static void main(String[] args) throws IOException { + init(); + int maxLen = DP(); + + bw.write((N-maxLen) + "\n"); + bw.flush(); + bw.close(); + br.close(); + } + + private static void init() throws IOException { + N = Integer.parseInt(br.readLine()); + + arr = new int[N][2]; + memo = new int[N]; + + for (int i = 0; i < N; i++) { + StringTokenizer st = new StringTokenizer(br.readLine()); + int a = Integer.parseInt(st.nextToken()); + int b = Integer.parseInt(st.nextToken()); + + arr[i][0] = a; + arr[i][1] = b; + } + + Arrays.sort(arr, (o1, o2) -> Integer.compare(o1[0], o2[0])); + } + + private static int DP() { + int len = 0; + + for (int i = 0; i < N; i++) { + int key = arr[i][1]; + + if (len == 0 || memo[len - 1] < key) { + memo[len] = key; + len++; + } else { + int index = binarySearch(len - 1, key); + memo[index] = key; + } + } + + return len; + } + + private static int binarySearch(int right, int key) { + int left = 0; + + while (left < right) { + int mid = left + (right-left)/2; + + if (memo[mid] >= key) { + right = mid; + } + else left = mid+1; + } + + return right; + } +} +```