#299219 (Java) No.273 回文分解

• 問題: No.273 回文分解
• ユーザー: hhgfhn1
• 提出日時: 2018-11-23 15:53:54
• 言語: Java (openjdk 23)
• 結果: AC
• 実行時間: 55 ms / 2,000 ms
• コード長: 3,159 bytes
• コンパイル時間: 2,969 ms
• コンパイル使用メモリ: 77,440 KB
• 実行使用メモリ: 36,868 KB
• 最終ジャッジ日時: 2024-12-24 18:22:21
• 合計ジャッジ時間: 5,958 ms
• ジャッジサーバーID （参考情報）: judge4 / judge5

ファイルパターン	結果
sample	AC * 3
other	AC * 32

ソースコード

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import java.io.IOException;
import java.io.InputStream;
import java.util.NoSuchElementException;
public class Main {
    public static void main(String args[]) {
        FastScanner scanner = new FastScanner();
        String s=scanner.next();
        int max=Integer.MIN_VALUE;
        for(int i=0;i<s.length();i++) {
            for(int j=i+1;j<=s.length();j++) {
                String tmp=s.substring(i,j);
                if(tmp.equals(s)) {
                    continue;
                }
                if(check(tmp)) {
                    int n=tmp.length();
                    max=Math.max(max, n);
                }
            }
        }
        System.out.println(max);
    }
    private static boolean check(String tmp) {
        int l=tmp.length();
        if(tmp.length()%2==0) {
            if(check1(tmp.substring(0,l/2),tmp.substring(l/2,l))) {
                return true;
            }else {
                return false;
            }
        }else {
            if(check1(tmp.substring(0,l/2),tmp.substring(l/2+1,l))) {
                return true;
            }else {
                return false;
            }
        }
    }
    private static boolean check1(String s1, String s2) {
        for(int i=0;i<s1.length();i++) {
            if(s1.charAt(i)==s2.charAt(s2.length()-1-i)) {
                continue;
            }else {
                return false;
            }
        }
        return true;
    }
}
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 static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; 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();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}
 
 
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