結果
問題 | No.852 連続部分文字列 |
ユーザー | kusomushi |
提出日時 | 2019-08-29 20:44:47 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 175 ms / 3,153 ms |
コード長 | 5,415 bytes |
コンパイル時間 | 2,430 ms |
コンパイル使用メモリ | 76,316 KB |
実行使用メモリ | 55,988 KB |
最終ジャッジ日時 | 2023-08-11 04:12:28 |
合計ジャッジ時間 | 9,695 ms |
ジャッジサーバーID (参考情報) |
judge15 / judge13 |
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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 | 44 ms
49,840 KB |
testcase_01 | AC | 46 ms
50,100 KB |
testcase_02 | AC | 45 ms
49,856 KB |
testcase_03 | AC | 44 ms
49,748 KB |
testcase_04 | AC | 44 ms
49,984 KB |
testcase_05 | AC | 44 ms
49,752 KB |
testcase_06 | AC | 44 ms
49,860 KB |
testcase_07 | AC | 45 ms
49,848 KB |
testcase_08 | AC | 43 ms
49,764 KB |
testcase_09 | AC | 43 ms
48,088 KB |
testcase_10 | AC | 43 ms
49,904 KB |
testcase_11 | AC | 45 ms
49,900 KB |
testcase_12 | AC | 44 ms
49,956 KB |
testcase_13 | AC | 53 ms
50,860 KB |
testcase_14 | AC | 49 ms
49,804 KB |
testcase_15 | AC | 55 ms
50,756 KB |
testcase_16 | AC | 53 ms
50,136 KB |
testcase_17 | AC | 55 ms
50,260 KB |
testcase_18 | AC | 55 ms
50,876 KB |
testcase_19 | AC | 45 ms
49,804 KB |
testcase_20 | AC | 53 ms
50,856 KB |
testcase_21 | AC | 58 ms
50,952 KB |
testcase_22 | AC | 49 ms
50,108 KB |
testcase_23 | AC | 55 ms
51,196 KB |
testcase_24 | AC | 52 ms
50,876 KB |
testcase_25 | AC | 54 ms
50,148 KB |
testcase_26 | AC | 54 ms
50,384 KB |
testcase_27 | AC | 53 ms
51,008 KB |
testcase_28 | AC | 54 ms
51,004 KB |
testcase_29 | AC | 55 ms
50,828 KB |
testcase_30 | AC | 47 ms
49,932 KB |
testcase_31 | AC | 56 ms
50,388 KB |
testcase_32 | AC | 55 ms
50,920 KB |
testcase_33 | AC | 175 ms
55,744 KB |
testcase_34 | AC | 162 ms
55,852 KB |
testcase_35 | AC | 167 ms
55,512 KB |
testcase_36 | AC | 169 ms
55,592 KB |
testcase_37 | AC | 166 ms
55,300 KB |
testcase_38 | AC | 151 ms
55,988 KB |
testcase_39 | AC | 171 ms
55,824 KB |
testcase_40 | AC | 167 ms
53,536 KB |
testcase_41 | AC | 166 ms
55,480 KB |
testcase_42 | AC | 164 ms
55,284 KB |
testcase_43 | AC | 166 ms
55,404 KB |
ソースコード
import java.io.*; import java.math.BigDecimal; import java.util.Arrays; import java.util.StringJoiner; import java.util.StringTokenizer; public class Main { static String S; public static void main(String[] args) { FastScanner sc = new FastScanner(System.in); S = sc.next(); System.out.println(BigDecimal.valueOf(solve()).toPlainString()); } static double solve() { int[] prev = new int[26]; Arrays.fill(prev, -1); long cnt = 0; for (int i = 0; i < S.length(); i++) { char c = S.charAt(i); int p = prev[c-'a']; int len; if( p == -1 ) { // [0, i)の範囲でcが存在しない len = i; } else { // [p, i)の範囲でcが存在しない len = i-p-1; } cnt += arith(len); prev[c-'a'] = i; } for (int i = 0; i < 26; i++) { if( prev[i] == -1 ) { // 全面的に出てこなかった cnt += arith(S.length()); } else { // (p, N)の範囲にcが存在しない cnt += arith(S.length()-prev[i]-1); } } long sum = arith(S.length()) * 26 - cnt; return (double)sum / arith(S.length()); } static long arith(int len) { return (long)len * (len+1) / 2; } @SuppressWarnings("unused") static class FastScanner { private BufferedReader reader; private StringTokenizer tokenizer; FastScanner(InputStream in) { reader = new BufferedReader(new InputStreamReader(in)); tokenizer = null; } String next() { if (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new StringTokenizer(reader.readLine()); } catch (IOException e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } String nextLine() { if (tokenizer == null || !tokenizer.hasMoreTokens()) { try { return reader.readLine(); } catch (IOException e) { throw new RuntimeException(e); } } return tokenizer.nextToken("\n"); } long nextLong() { return Long.parseLong(next()); } int nextInt() { return Integer.parseInt(next()); } int[] nextIntArray(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt(); return a; } int[] nextIntArray(int n, int delta) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt() + delta; return a; } long[] nextLongArray(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nextLong(); return a; } } static void writeLines(int[] as) { PrintWriter pw = new PrintWriter(System.out); for (int a : as) pw.println(a); pw.flush(); } static void writeLines(long[] as) { PrintWriter pw = new PrintWriter(System.out); for (long a : as) pw.println(a); pw.flush(); } static void writeSingleLine(int[] as) { PrintWriter pw = new PrintWriter(System.out); for (int i = 0; i < as.length; i++) { if (i != 0) pw.print(" "); pw.print(as[i]); } pw.println(); pw.flush(); } static int max(int... as) { int max = Integer.MIN_VALUE; for (int a : as) max = Math.max(a, max); return max; } static int min(int... as) { int min = Integer.MAX_VALUE; for (int a : as) min = Math.min(a, min); return min; } static void debug(Object... args) { StringJoiner j = new StringJoiner(" "); for (Object arg : args) { if (arg == null) j.add("null"); else if (arg instanceof int[]) j.add(Arrays.toString((int[]) arg)); else if (arg instanceof long[]) j.add(Arrays.toString((long[]) arg)); else if (arg instanceof double[]) j.add(Arrays.toString((double[]) arg)); else if (arg instanceof Object[]) j.add(Arrays.toString((Object[]) arg)); else j.add(arg.toString()); } System.err.println(j.toString()); } static void printSingleLine(int[] array) { PrintWriter pw = new PrintWriter(System.out); for (int i = 0; i < array.length; i++) { if (i != 0) pw.print(" "); pw.print(array[i]); } pw.println(); pw.flush(); } static int lowerBound(int[] array, int value) { int lo = 0, hi = array.length, mid; while (lo < hi) { mid = (hi + lo) / 2; if (array[mid] < value) lo = mid + 1; else hi = mid; } return lo; } static int upperBound(int[] array, int value) { int lo = 0, hi = array.length, mid; while (lo < hi) { mid = (hi + lo) / 2; if (array[mid] <= value) lo = mid + 1; else hi = mid; } return lo; } }