結果
| 問題 | 
                            No.1704 Many Bus Stops (easy)
                             | 
                    
| コンテスト | |
| ユーザー | 
                             tenten
                         | 
                    
| 提出日時 | 2024-01-11 17:50:22 | 
| 言語 | Java  (openjdk 23)  | 
                    
| 結果 | 
                             
                                AC
                                 
                             
                            
                         | 
                    
| 実行時間 | 165 ms / 2,000 ms | 
| コード長 | 3,101 bytes | 
| コンパイル時間 | 2,847 ms | 
| コンパイル使用メモリ | 91,396 KB | 
| 実行使用メモリ | 56,536 KB | 
| 最終ジャッジ日時 | 2024-09-27 20:39:06 | 
| 合計ジャッジ時間 | 10,168 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge1 / judge3 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 1 | 
| other | AC * 41 | 
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();
        long rate = pow(3, MOD - 2);
        long[][][] matrix = new long[30][6][6];
        matrix[0] = new long[][]{{0, 0, 0, 1, 0, 0}, {0, 0, 0, 0, 1, 0}, {0, 0, 0, 0, 0, 1}, {0, rate, rate, rate, 0, 0}, {rate, 0, rate, 0, rate, 0}, {rate, rate, 0, 0, 0, rate}};
        for (int i = 1; i < 30; i++) {
            for (int a = 0; a < 6; a++) {
                for (int b = 0; b < 6; b++) {
                    for (int c = 0; c < 6; c++) {
                        matrix[i][a][c] += matrix[i - 1][a][b] * matrix[i - 1][b][c];
                        matrix[i][a][c] %= MOD;
                    }
                }
            }
        }
        StringBuilder sb = new StringBuilder();
        while (n-- > 0) {
            int k = sc.nextInt();
            long[] ans = new long[]{1, 0, 0, rate, 0, 0};
            for (int i = 29; i >= 0; i--) {
                if (k < (1 << i)) {
                    continue;
                }
                k -= (1 << i);
                long[] next = new long[6];
                for (int a = 0; a < 6; a++) {
                    for (int b = 0; b < 6; b++) {
                        next[a] += matrix[i][a][b] * ans[b] % MOD;
                        next[a] %= MOD;
                    }
                }
                ans = next;
            }
            sb.append(ans[0]).append("\n");
        }
        System.out.print(sb);
    }
    
    static long pow(long x, int p) {
        if (p == 0) {
            return 1;
        } else if (p % 2 == 0) {
            return pow(x * x % MOD, p / 2);
        } else {
            return pow(x, p - 1) * x % MOD;
        }
    }
}
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