結果

問題 No.1159 Sashiming String
ユーザー neko_the_shadowneko_the_shadow
提出日時 2020-08-28 09:58:09
言語 Java21
(openjdk 21)
結果
AC  
実行時間 183 ms / 2,000 ms
コード長 4,608 bytes
コンパイル時間 2,754 ms
コンパイル使用メモリ 84,300 KB
実行使用メモリ 43,596 KB
最終ジャッジ日時 2024-11-09 01:07:52
合計ジャッジ時間 5,170 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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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 73 ms
38,376 KB
testcase_01 AC 76 ms
38,460 KB
testcase_02 AC 145 ms
40,880 KB
testcase_03 AC 174 ms
43,076 KB
testcase_04 AC 139 ms
41,404 KB
testcase_05 AC 170 ms
41,964 KB
testcase_06 AC 124 ms
40,716 KB
testcase_07 AC 142 ms
41,356 KB
testcase_08 AC 183 ms
43,368 KB
testcase_09 AC 179 ms
43,596 KB
testcase_10 AC 72 ms
38,340 KB
testcase_11 AC 74 ms
38,320 KB
testcase_12 AC 76 ms
38,272 KB
testcase_13 AC 75 ms
38,320 KB
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ソースコード

diff #

package _1159;

import java.io.BufferedReader;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UncheckedIOException;
import java.lang.reflect.Array;
import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Deque;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

public class Main {
    public void exec() {
        String s = stdin.nextString();

        int n = s.length();
        Pattern p = Pattern.compile("ing");
        Matcher m = p.matcher(s);
        long[] a = new long[n+1];
        while (m.find()) {
            a[m.start()]++;
        }
        for (int i = 0; i < n; i++) {
            a[i+1] += a[i];
        }

        long ans = 0;
        for (int i = 0; i < n; i++) {
            if (s.charAt(i) == 'S') {
                ans += a[n] - a[i];
            }
        }
        stdout.println(ans);
    }

    private static final Stdin stdin = new Stdin();
    private static final Stdout stdout = new Stdout();

    public static void main(String[] args) {
        try {
            new Main().exec();
        } finally {
            stdout.flush();
        }
    }

    public static class Stdin {
        private BufferedReader stdin;
        private Deque<String> tokens;
        private Pattern delim;

        public Stdin() {
            stdin = new BufferedReader(new InputStreamReader(System.in));
            tokens = new ArrayDeque<>();
            delim = Pattern.compile(" ");
        }

        public String nextString() {
            try {
                if (tokens.isEmpty()) {
                    String line = stdin.readLine();
                    if (line == null) {
                        throw new UncheckedIOException(new EOFException());
                    }
                    delim.splitAsStream(line).forEach(tokens::addLast);
                }
                return tokens.pollFirst();
            } catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        }

        public int nextInt() {
            return Integer.parseInt(nextString());
        }

        public double nextDouble() {
            return Double.parseDouble(nextString());
        }

        public long nextLong() {
            return Long.parseLong(nextString());
        }

        public String[] nextStringArray(int n) {
            String[] a = new String[n];
            for (int i = 0; i < n; i++) a[i] = nextString();
            return a;
        }

        public int[] nextIntArray(int n) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++) a[i] = nextInt();
            return a;
        }

        public double[] nextDoubleArray(int n) {
            double[] a = new double[n];
            for (int i = 0; i < n; i++) a[i] = nextDouble();
            return a;
        }

        public long[] nextLongArray(int n) {
            long[] a = new long[n];
            for (int i = 0; i < n; i++) a[i] = nextLong();
            return a;
        }
    }

    public static class Stdout {
        private PrintWriter stdout;

        public Stdout() {
            stdout =  new PrintWriter(System.out, false);
        }

        public void printf(String format, Object ... args) {
            String line = String.format(format, args);
            if (line.endsWith(System.lineSeparator())) {
                stdout.print(line);
            } else {
                stdout.println(line);
            }
        }

        public void println(Object ... o) {
            String line = Arrays.stream(o).map(Objects::toString).collect(Collectors.joining(" "));
            stdout.println(line);
        }

        public void debug(Object ... objs) {
            String line = Arrays.stream(objs).map(this::deepToString).collect(Collectors.joining(" "));
            stdout.printf("DEBUG: %s%n", line);
        }

        private String deepToString(Object o) {
            if (o == null) {
                return "null";
            }

            // 配列の場合
            if (o.getClass().isArray()) {
                int len = Array.getLength(o);
                String[] tokens = new String[len];
                for (int i = 0; i < len; i++) {
                    tokens[i] = deepToString(Array.get(o, i));
                }
                return "{" + String.join(",", tokens) + "}";
            }

            return Objects.toString(o);
        }

        public void flush() {
            stdout.flush();
        }
    }
}
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