結果
問題 | No.1972 Modulo Set |
ユーザー |
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提出日時 | 2023-04-19 14:09:15 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 395 ms / 2,000 ms |
コード長 | 2,148 bytes |
コンパイル時間 | 2,752 ms |
コンパイル使用メモリ | 89,896 KB |
実行使用メモリ | 53,340 KB |
最終ジャッジ日時 | 2024-10-14 14:08:26 |
合計ジャッジ時間 | 13,858 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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();long m = sc.nextLong();HashMap<Long, Integer> counts = new HashMap<>();for (int i = 0; i < n; i++) {long x = sc.nextLong() % m;counts.put(x, counts.getOrDefault(x, 0) + 1);}int ans = 0;for (long x : counts.keySet()) {if (x == 0) {ans++;} else if (x * 2 == m) {ans++;} else {int left = counts.get(x);int right = counts.getOrDefault(m - x, 0);if (left > right || (left == right && x * 2 < m)) {ans += left;}}}System.out.println(ans);}}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();}}