#238913 (Java) No.708 （＋ー）の式

• 問題: No.708 （＋ー）の式
• ユーザー: 37zigen
• 提出日時: 2018-02-24 18:40:24
• 言語: Java (openjdk 23)
• 結果: AC
• 実行時間: 53 ms / 2,000 ms
• コード長: 2,733 bytes
• コンパイル時間: 2,468 ms
• コンパイル使用メモリ: 77,764 KB
• 実行使用メモリ: 36,836 KB
• 最終ジャッジ日時: 2024-10-15 04:26:06
• 合計ジャッジ時間: 3,807 ms
• ジャッジサーバーID （参考情報）: judge2 / judge3

ファイルパターン	結果
sample	AC * 3
other	AC * 12

ソースコード

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import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.NoSuchElementException;
public class Main {
    public static void main(String[] args) {
        new Main().run();
    }
    void run() {
        FastScanner sc = new FastScanner();
        String S = sc.next();
        long ans = 0;
        for (int i = 0; i < S.length(); ++i) {
            if (S.charAt(i) == '(') {
                long tmp = 0;
                int j = i;
                while (S.charAt(j) != ')') {
                    ++j;
                    if (S.charAt(j) - '0' >= 0 && S.charAt(j) - '0' <= 9) {
                        tmp += (S.charAt(j) - '0') * sign(S, j - 1);
                    }
                }
                ans += sign(S, i - 1) * tmp;
                i = j;
            } else if (S.charAt(i) - '0' >= 0 && S.charAt(i) - '0' <= 9) {
                ans += sign(S, i - 1) * (S.charAt(i) - '0');
            }
        }
        System.out.println(ans);
    }
    int sign(String S, int idx) {
        if (idx < 0)
            return 1;
        if (S.charAt(idx) == '+')
            return 1;
        else if (S.charAt(idx) == '-')
            return -1;
        else if (S.charAt(idx) == '(')
            return 1;
        else
            throw new AssertionError();
    }
    class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;
        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }
        private int readByte() {
            if (hasNextByte())
                return buffer[ptr++];
            else
                return -1;
        }
        private boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }
        private void skipUnprintable() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr]))
                ptr++;
        }
        public boolean hasNext() {
            skipUnprintable();
            return hasNextByte();
        }
        public String next() {
            if (!hasNext())
                throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }
        public long nextLong() {
            if (!hasNext())
                throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }
    }
    void tr(Object... objects) {
        System.out.println(Arrays.deepToString(objects));
    }
}
 
 
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