結果
問題 | No.275 中央値を求めよ |
ユーザー |
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提出日時 | 2018-12-01 19:50:01 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 56 ms / 1,000 ms |
コード長 | 2,380 bytes |
コンパイル時間 | 2,170 ms |
コンパイル使用メモリ | 78,268 KB |
実行使用メモリ | 50,388 KB |
最終ジャッジ日時 | 2024-06-27 00:02:35 |
合計ジャッジ時間 | 5,460 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 38 |
ソースコード
import java.io.IOException;import java.util.Arrays;import java.util.NoSuchElementException;public class Main{public static void main(String args[])throws Exception{FastScanner sc = new FastScanner();int N = sc.nextInt();int[] a = new int[N];for(int i=0;i<N;i++){a[i] = sc.nextInt();}Arrays.sort(a);if(N%2==1){System.out.println(a[N/2]);}else{System.out.println(((double)a[N/2-1]+(double)a[N/2])/2.0);}}}class FastScanner {private final java.io.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 int nextInt() {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 (int) (minus ? -n : n);}else{throw new NumberFormatException();}b = readByte();}}}