結果
問題 | No.2260 Adic Sum |
ユーザー |
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提出日時 | 2023-04-10 10:34:27 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 1,187 ms / 2,000 ms |
コード長 | 2,353 bytes |
コンパイル時間 | 2,488 ms |
コンパイル使用メモリ | 95,920 KB |
実行使用メモリ | 62,340 KB |
最終ジャッジ日時 | 2024-10-06 07:30:56 |
合計ジャッジ時間 | 17,121 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 33 |
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 p = sc.nextInt(); int[] values = new int[n]; for (int i = 0; i < n; i++) { values[i] = sc.nextInt(); } Arrays.sort(values); int current = 1; ArrayList<Integer> ps = new ArrayList<>(); while (current * (long)p <= 1000000000) { current *= p; ps.add(current); } long ans = 0; for (int x : ps) { int[] mods = new int[n]; HashMap<Integer, Integer> counts = new HashMap<>(); for (int i = 0; i < n; i++) { mods[i] = values[i] % x; counts.put(mods[i], counts.getOrDefault(mods[i], 0) + 1); } for (int i = 0; i < n; i++) { counts.put(mods[i], counts.get(mods[i]) - 1); ans += counts.getOrDefault(mods[i], 0); } } 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(); } }