結果
| 問題 | No.1791 Repeat Multiplication | 
| コンテスト | |
| ユーザー |  tenten | 
| 提出日時 | 2023-01-17 09:34:51 | 
| 言語 | Java (openjdk 23) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 533 ms / 3,000 ms | 
| コード長 | 2,271 bytes | 
| コンパイル時間 | 5,952 ms | 
| コンパイル使用メモリ | 93,024 KB | 
| 実行使用メモリ | 81,800 KB | 
| 最終ジャッジ日時 | 2025-01-02 04:46:07 | 
| 合計ジャッジ時間 | 17,743 ms | 
| ジャッジサーバーID (参考情報) | judge4 / judge3 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 32 | 
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
    static long[] counts;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int q = sc.nextInt();
        counts = new long[n + 1];
        for (int i = 1; i <= n; i++) {
            dfw(i);
        }
        long[] times = new long[n + 1];
        times[1] = 1;
        for (int i = 1; i <= n; i++) {
            for (int j = 2; j * i <= n; j++) {
                times[j * i] += times[i];
            }
            counts[i] *= times[i];
        }
        StringBuilder sb = new StringBuilder();
        while (q-- > 0) {
            sb.append(counts[sc.nextInt()]).append("\n");
        }
        System.out.print(sb);
    }
    
    static long dfw(int x) {
        if (counts[x] == 0) {
            counts[x] = 1;
            for (int i = 2; i * x < counts.length; i++) {
                counts[x] += dfw(x * i);
            }
        }
        return counts[x];
    }
}
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();
    }
    
}
            
            
            
        