#460471 (Go) No.275 中央値を求めよ

• 問題: No.275 中央値を求めよ
• ユーザー: ccppjsrb
• 提出日時: 2020-04-08 11:53:53
• 言語: Go (1.18)
• 結果: AC
• 実行時間: 2 ms / 1,000 ms
• コード長: 1,618 bytes
• コンパイル時間: 559 ms
• 使用メモリ: 9,780 KB
• 最終ジャッジ日時: 2023-02-16 04:11:51
• 合計ジャッジ時間: 2,527 ms
• ジャッジサーバーID （参考情報）: judge14 / judge12

入力	結果	実行時間; 使用メモリ
testcase_00	AC	2 ms; 7,720 KB
testcase_01	AC	2 ms; 7,592 KB
testcase_02	AC	2 ms; 7,672 KB
testcase_03	AC	2 ms; 7,656 KB
testcase_04	AC	2 ms; 7,656 KB
testcase_05	AC	2 ms; 7,572 KB
testcase_06	AC	2 ms; 7,588 KB
testcase_07	AC	2 ms; 7,600 KB
testcase_08	AC	2 ms; 9,692 KB
testcase_09	AC	2 ms; 9,684 KB
testcase_10	AC	2 ms; 7,608 KB
testcase_11	AC	2 ms; 7,656 KB
testcase_12	AC	2 ms; 7,672 KB
testcase_13	AC	1 ms; 7,576 KB
testcase_14	AC	2 ms; 7,672 KB
testcase_15	AC	2 ms; 7,672 KB
testcase_16	AC	2 ms; 7,584 KB
testcase_17	AC	2 ms; 7,668 KB
testcase_18	AC	2 ms; 7,660 KB
testcase_19	AC	2 ms; 7,596 KB
testcase_20	AC	2 ms; 7,684 KB
testcase_21	AC	2 ms; 7,596 KB
testcase_22	AC	2 ms; 7,672 KB
testcase_23	AC	2 ms; 9,688 KB
testcase_24	AC	2 ms; 7,592 KB
testcase_25	AC	2 ms; 7,720 KB
testcase_26	AC	2 ms; 7,608 KB
testcase_27	AC	2 ms; 7,596 KB
testcase_28	AC	2 ms; 9,780 KB
testcase_29	AC	2 ms; 7,568 KB
testcase_30	AC	2 ms; 9,772 KB
testcase_31	AC	2 ms; 7,672 KB
testcase_32	AC	2 ms; 7,592 KB
testcase_33	AC	2 ms; 7,676 KB
testcase_34	AC	2 ms; 7,612 KB
testcase_35	AC	2 ms; 9,692 KB
testcase_36	AC	1 ms; 7,680 KB
testcase_37	AC	2 ms; 7,680 KB
testcase_38	AC	2 ms; 7,600 KB
testcase_39	AC	2 ms; 7,608 KB
testcase_40	AC	2 ms; 7,680 KB

ソースコード

package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}

func getNextUint64(scanner *bufio.Scanner) uint64 {
	i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
	return i
}

func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}

func main() {
	fp := os.Stdin
	wfp := os.Stdout
	cnt := 0

	if os.Getenv("MASPY") == "ますピ" {
		fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
		cnt = 2
	}
	if os.Getenv("MASPYPY") == "ますピッピ" {
		wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(wfp)
	solve(scanner, writer)
	for i := 0; i < cnt; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
	writer.Flush()
}

func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)

	aa := make([]int, n)
	for i := 0; i < n; i++ {
		aa[i] = getNextInt(scanner)
	}
	sort.Ints(aa)

	if n%2 == 1 {
		fmt.Fprintln(writer, aa[n/2])
		return
	}
	fmt.Fprintln(writer, (float64(aa[n/2])+float64(aa[n/2-1]))/2)
}