結果
| 問題 |
No.1973 Divisor Sequence
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-07-24 17:34:52 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 86 ms / 2,000 ms |
| コード長 | 3,388 bytes |
| コンパイル時間 | 2,271 ms |
| コンパイル使用メモリ | 90,124 KB |
| 実行使用メモリ | 39,324 KB |
| 最終ジャッジ日時 | 2024-10-01 12:42:46 |
| 合計ジャッジ時間 | 4,313 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 * 22 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
static final int MOD = 1000000007;
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt() - 1;
long m = sc.nextLong();
HashMap<Long, Integer> counts = new HashMap<>();
for (long i = 2; i <= Math.sqrt(m); i++) {
while (m % i == 0) {
counts.put(i, counts.getOrDefault(i, 0) + 1);
m /= i;
}
}
if (m > 1) {
counts.put(m, 1);
}
long result = 1;
for (int x : counts.values()) {
long[][][] matrix = new long[20][x + 1][x + 1];
for (int i = 0; i <= x; i++) {
for (int j = 0; j + i <= x; j++) {
matrix[0][i][j] = 1;
}
}
for (int i = 1; i < 20; i++) {
for (int a = 0; a <= x; a++) {
for (int b = 0; b <= x; b++) {
for (int c = 0; c <= x; c++) {
matrix[i][a][c] += matrix[i - 1][a][b] * matrix[i - 1][b][c] % MOD;
matrix[i][a][c] %= MOD;
}
}
}
}
long[] ans = new long[x + 1];
int current = n;
Arrays.fill(ans, 1);
for (int i = 19; i >= 0; i--) {
if (current < (1 << i)) {
continue;
}
current -= (1 << i);
long[] next = new long[x + 1];
for (int a = 0; a <= x; a++) {
for (int b = 0; b <= x; b++) {
next[a] += matrix[i][a][b] * ans[b] % MOD;
next[a] %= MOD;
}
}
ans = next;
}
long tmp = 0;
for (long y : ans) {
tmp += y;
tmp %= MOD;
}
result *= tmp;
result %= MOD;
}
System.out.println(result);
}
}
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();
}
}
tenten