From 3c6ed66a6a7c5b8394a1cb38c45ec1c71436eec5 Mon Sep 17 00:00:00 2001 From: zinnnn37 Date: Mon, 22 Sep 2025 21:17:49 +0900 Subject: [PATCH] =?UTF-8?q?[20250922]=20BOJ=20/=20G4=20/=20=EC=A0=90?= =?UTF-8?q?=EC=8B=AC=EB=A9=94=EB=89=B4=20/=20=EA=B9=80=EB=AF=BC=EC=A7=84?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...20\354\213\254\353\251\224\353\211\264.md" | 123 ++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 "zinnnn37/202509/22 BOJ G4 \354\240\220\354\213\254\353\251\224\353\211\264.md" diff --git "a/zinnnn37/202509/22 BOJ G4 \354\240\220\354\213\254\353\251\224\353\211\264.md" "b/zinnnn37/202509/22 BOJ G4 \354\240\220\354\213\254\353\251\224\353\211\264.md" new file mode 100644 index 00000000..e1993514 --- /dev/null +++ "b/zinnnn37/202509/22 BOJ G4 \354\240\220\354\213\254\353\251\224\353\211\264.md" @@ -0,0 +1,123 @@ +```java +import java.io.*; +import java.util.Arrays; +import java.util.StringTokenizer; + +public class BJ_12099_점심메뉴 { + + private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); + private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); + private static final StringBuilder sb = new StringBuilder(); + private static StringTokenizer st; + + private static int N; + private static int Q; + + private static Node[] taste; + private static int[] sweetness; + + private static class Node implements Comparable { + int spiciness; + int sweetness; + + Node(int s, int w) { + spiciness = s; + sweetness = w; + } + + @Override + public int compareTo(Node o) { + return Integer.compare(this.spiciness, o.spiciness); + } + } + + public static void main(String[] args) throws IOException { + init(); + sol(); + } + + private static void init() throws IOException { + st = new StringTokenizer(br.readLine()); + N = Integer.parseInt(st.nextToken()); + Q = Integer.parseInt(st.nextToken()); + + taste = new Node[N]; + for (int i = 0; i < N; i++) { + st = new StringTokenizer(br.readLine()); + + int s = Integer.parseInt(st.nextToken()); + int w = Integer.parseInt(st.nextToken()); + + taste[i] = new Node(s, w); + } + + Arrays.sort(taste); + } + + private static void sol() throws IOException { + while (Q-- > 0) { + st = new StringTokenizer(br.readLine()); + + int s1 = Integer.parseInt(st.nextToken()); + int s2 = Integer.parseInt(st.nextToken()); + int w1 = Integer.parseInt(st.nextToken()); + int w2 = Integer.parseInt(st.nextToken()); + + int left = lowerBound(s1); + int right = upperBound(s2); + + if (left >= right) { + sb.append("0\n"); + continue; + } + + int cnt = 0; + for (int i = left; i < right; i++) { + if (w1 <= taste[i].sweetness && taste[i].sweetness <= w2) { + cnt++; + } + } + sb.append(cnt).append("\n"); + } + bw.write(sb.toString()); + bw.flush(); + bw.close(); + br.close(); + } + + // s1 이상인 첫 번째 인덱스 + private static int lowerBound(int target) { + int left = 0; + int right = N; + + while (left < right) { + int mid = left + (right - left) / 2; + + if (taste[mid].spiciness < target) { + left = mid + 1; + } else { + right = mid; + } + } + return left; + } + + // s2 초과인 첫 번째 인덱스 + private static int upperBound(int target) { + int left = 0; + int right = N; + + while (left < right) { + int mid = left + (right - left) / 2; + + if (taste[mid].spiciness <= target) { + left = mid + 1; + } else { + right = mid; + } + } + return left; + } + +} +``` \ No newline at end of file