結果
問題 | No.2021 Not A but B |
ユーザー | 37zigen |
提出日時 | 2022-07-29 21:41:12 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 108 ms / 2,000 ms |
コード長 | 3,144 bytes |
コンパイル時間 | 4,490 ms |
コンパイル使用メモリ | 77,384 KB |
実行使用メモリ | 39,744 KB |
最終ジャッジ日時 | 2024-07-19 14:04:29 |
合計ジャッジ時間 | 7,600 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 26 |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; public class Main implements Runnable { public static void main(String[] args) { new Thread(null, new Main(), "", Runtime.getRuntime().maxMemory()).start(); } final long mod = 998244353; public void run() { FastScanner sc=new FastScanner(); PrintWriter pw=new PrintWriter(System.out); int N=sc.nextInt(); char[] cs=sc.next().toCharArray(); int ans=N-1; int unchanged = 0; for (int i=0;i + 1<cs.length;++i) { if (cs[i] == 'B' && cs[i + 1] == 'B') ++unchanged; if (cs[i] == 'A' && cs[i + 1] == 'A') continue; } for (int i=0;i+2<cs.length;++i) { char a=cs[i]; char b=cs[i+1]; char c=cs[i+2]; if (a=='B'&&b=='A'&&c=='B') --ans; } ans -= Math.max(0, unchanged - 1); pw.println(ans); pw.close(); } void tr(Object...objects) {System.err.println(Arrays.deepToString(objects));} } 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;} 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(); } } public int nextInt() { return (int)nextLong(); } }