結果
問題 | No.2017 Mod7 Parade |
ユーザー |
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提出日時 | 2023-07-24 18:31:52 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 654 ms / 2,000 ms |
コード長 | 2,781 bytes |
コンパイル時間 | 3,019 ms |
コンパイル使用メモリ | 91,232 KB |
実行使用メモリ | 47,116 KB |
最終ジャッジ日時 | 2024-10-01 13:45:25 |
合計ジャッジ時間 | 12,843 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 18 |
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();int[] counts = new int[7];counts[0] = 1;while (n-- > 0) {int d = sc.nextInt();int length = sc.nextInt();int x = getLength(d, length);int by = pow(10, length);int[] next = new int[7];for (int i = 0; i < 7; i++) {next[(i * by + x) % 7] += counts[i];next[(i * by + x) % 7] %= MOD;}for (int i = 0; i < 7; i++) {counts[i] += next[i];counts[i] %= MOD;}}long ans = 0;for (int i = 1; i < 7; i++) {ans += (long)counts[i] * i;ans %= MOD;}System.out.println(ans);}static int getLength(int x, int len) {if (len == 1) {return x % 7;} else if (len % 2 == 0) {int tmp = getLength(x, len / 2);return (tmp * pow(10, len / 2) + tmp) % 7;} else {return (getLength(x, len - 1) * 10 + x) % 7;}}static int pow(int x, int p) {if (p == 0) {return 1;} else if (p % 2 == 0) {return pow(x * x % 7, p / 2);} else {return pow(x, p - 1) * x % 7;}}}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();}}