結果
問題 | No.84 悪の算盤 |
ユーザー |
|
提出日時 | 2020-03-20 04:59:11 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 58 ms / 5,000 ms |
コード長 | 2,443 bytes |
コンパイル時間 | 2,401 ms |
コンパイル使用メモリ | 78,492 KB |
実行使用メモリ | 50,128 KB |
最終ジャッジ日時 | 2024-12-14 03:56:25 |
合計ジャッジ時間 | 3,904 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 10 |
ソースコード
import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.Arrays;import java.util.NoSuchElementException;public class Main {public static void main(String[] args) throws FileNotFoundException {long t = System.currentTimeMillis();new Main().run();System.err.println(System.currentTimeMillis() - t);}Scanner sc = new Scanner();void run() {long R=sc.nextLong();long C=sc.nextLong();long ans=0;if(R==C) {ans=(R*C-(R%2==1&&C%2==1?1:0))/4+(R%2==1&&C%2==1?1:0);}else {ans=(R*C-(R%2==1&&C%2==1?1:0))/2+(R%2==1&&C%2==1?1:0);}System.out.println(ans-1);}class Scanner {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++];elsereturn -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();}}public int nextInt() {return (int) nextLong();}}static void tr(Object... objects) {System.out.println(Arrays.deepToString(objects));}}