結果
問題 | No.1171 Runs in Subsequences |
ユーザー | hiromi_ayase |
提出日時 | 2020-08-15 10:29:18 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 453 ms / 2,000 ms |
コード長 | 3,289 bytes |
コンパイル時間 | 3,426 ms |
コンパイル使用メモリ | 84,448 KB |
実行使用メモリ | 145,408 KB |
最終ジャッジ日時 | 2024-10-10 17:23:18 |
合計ジャッジ時間 | 8,438 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 74 ms
51,272 KB |
testcase_01 | AC | 72 ms
51,328 KB |
testcase_02 | AC | 74 ms
50,888 KB |
testcase_03 | AC | 74 ms
51,464 KB |
testcase_04 | AC | 73 ms
51,108 KB |
testcase_05 | AC | 76 ms
51,284 KB |
testcase_06 | AC | 73 ms
51,284 KB |
testcase_07 | AC | 75 ms
51,300 KB |
testcase_08 | AC | 77 ms
51,368 KB |
testcase_09 | AC | 75 ms
51,012 KB |
testcase_10 | AC | 78 ms
51,476 KB |
testcase_11 | AC | 80 ms
51,124 KB |
testcase_12 | AC | 80 ms
51,196 KB |
testcase_13 | AC | 78 ms
51,384 KB |
testcase_14 | AC | 79 ms
51,304 KB |
testcase_15 | AC | 428 ms
141,136 KB |
testcase_16 | AC | 433 ms
141,160 KB |
testcase_17 | AC | 432 ms
145,316 KB |
testcase_18 | AC | 453 ms
144,552 KB |
testcase_19 | AC | 445 ms
145,220 KB |
testcase_20 | AC | 435 ms
145,192 KB |
testcase_21 | AC | 422 ms
145,408 KB |
ソースコード
import java.util.Arrays; public class Main { private static void solve() { char[] s = ns(); int n = s.length; int mod = (int) 1e9 + 7; long[][] dp = new long[n + 1][27]; long[][] dp2 = new long[n + 1][27]; dp[0][0] = 1; for (int i = 0; i < n; i++) { int c = s[i] - 'a' + 1; for (int j = 1; j <= 26; j++) { dp[i + 1][j] += dp[i][j]; dp[i + 1][c] += dp[i][j]; dp2[i + 1][j] += dp2[i][j]; if (c == j) { dp2[i + 1][c] += dp2[i][j]; } else { dp2[i + 1][c] += dp2[i][j] + dp[i][j]; } } dp[i + 1][0] += dp[i][0]; dp[i + 1][c] += dp[i][0]; dp2[i + 1][c] += dp[i][0]; for (int j = 1; j <= 26; j++) { dp[i + 1][j] %= mod; dp2[i + 1][j] %= mod; } } long ret = 0; for (int i = 1; i <= 26; i++) { ret += dp2[n][i]; ret %= mod; } System.out.println(ret); } public static void main(String[] args) { new Thread(null, new Runnable() { @Override public void run() { long start = System.currentTimeMillis(); String debug = args.length > 0 ? args[0] : null; if (debug != null) { try { is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug)); } catch (Exception e) { throw new RuntimeException(e); } } reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768); solve(); out.flush(); tr((System.currentTimeMillis() - start) + "ms"); } }, "", 64000000).start(); } private static java.io.InputStream is = System.in; private static java.io.PrintWriter out = new java.io.PrintWriter(System.out); private static java.util.StringTokenizer tokenizer = null; private static java.io.BufferedReader reader; public static String next() { while (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new java.util.StringTokenizer(reader.readLine()); } catch (Exception e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } private static double nd() { return Double.parseDouble(next()); } private static long nl() { return Long.parseLong(next()); } private static int[] na(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = ni(); return a; } private static char[] ns() { return next().toCharArray(); } private static long[] nal(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nl(); return a; } private static int[][] ntable(int n, int m) { int[][] table = new int[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[i][j] = ni(); } } return table; } private static int[][] nlist(int n, int m) { int[][] table = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[j][i] = ni(); } } return table; } private static int ni() { return Integer.parseInt(next()); } private static void tr(Object... o) { if (is != System.in) System.out.println(java.util.Arrays.deepToString(o)); } }