結果
問題 | No.1557 Binary Variable |
ユーザー |
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提出日時 | 2023-02-21 08:34:08 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 723 ms / 2,000 ms |
コード長 | 2,172 bytes |
コンパイル時間 | 4,263 ms |
コンパイル使用メモリ | 91,456 KB |
実行使用メモリ | 53,908 KB |
最終ジャッジ日時 | 2024-07-21 21:54:41 |
合計ジャッジ時間 | 27,320 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 |
ソースコード
import java.io.*;import java.util.*;import java.util.stream.*;public class Main {public static void main(String[] args) throws Exception {Scanner sc = new Scanner();int n = sc.nextInt();int m = sc.nextInt();Unit[] units = new Unit[m];for (int i = 0; i < m; i++) {units[i] = new Unit(sc.nextInt(), sc.nextInt());}Arrays.sort(units);int prev = -1;for (Unit x : units) {if (prev < x.left) {n--;prev = x.right;}}System.out.println(n);}static class Unit implements Comparable<Unit> {int left;int right;public Unit(int left, int right) {this.left = left;this.right = right;}public int compareTo(Unit another) {return right - another.right;}}}class Utilities {static String arrayToLineString(Object[] arr) {return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));}static String arrayToLineString(int[] arr) {return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));}}class Scanner {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));StringTokenizer st = new StringTokenizer("");StringBuilder sb = new StringBuilder();public Scanner() throws Exception {}public int nextInt() throws Exception {return Integer.parseInt(next());}public long nextLong() throws Exception {return Long.parseLong(next());}public double nextDouble() throws Exception {return Double.parseDouble(next());}public int[] nextIntArray() throws Exception {return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();}public String next() throws Exception {while (!st.hasMoreTokens()) {st = new StringTokenizer(br.readLine());}return st.nextToken();}}