#634512 (Go) No.1438 Broken Drawers

• 問題: No.1438 Broken Drawers
• ユーザー: ccppjsrb
• 提出日時: 2021-03-26 22:03:26
• 言語: Go (1.22.1)
• 結果: AC
• 実行時間: 22 ms / 2,000 ms
• コード長: 1,982 bytes
• コンパイル時間: 17,005 ms
• コンパイル使用メモリ: 211,920 KB
• 実行使用メモリ: 9,632 KB
• 最終ジャッジ日時: 2023-08-19 08:22:55
• 合計ジャッジ時間: 17,137 ms
• ジャッジサーバーID （参考情報）: judge14 / judge9

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 4,380 KB
testcase_01	AC	2 ms; 4,376 KB
testcase_02	AC	2 ms; 4,380 KB
testcase_03	AC	1 ms; 4,376 KB
testcase_04	AC	1 ms; 4,380 KB
testcase_05	AC	1 ms; 4,380 KB
testcase_06	AC	18 ms; 7,672 KB
testcase_07	AC	18 ms; 7,668 KB
testcase_08	AC	2 ms; 4,376 KB
testcase_09	AC	2 ms; 4,376 KB
testcase_10	AC	1 ms; 4,380 KB
testcase_11	AC	2 ms; 4,380 KB
testcase_12	AC	7 ms; 5,484 KB
testcase_13	AC	12 ms; 5,760 KB
testcase_14	AC	6 ms; 4,380 KB
testcase_15	AC	19 ms; 7,296 KB
testcase_16	AC	19 ms; 7,176 KB
testcase_17	AC	20 ms; 7,396 KB
testcase_18	AC	20 ms; 7,476 KB
testcase_19	AC	20 ms; 7,524 KB
testcase_20	AC	20 ms; 7,552 KB
testcase_21	AC	21 ms; 7,448 KB
testcase_22	AC	21 ms; 9,632 KB
testcase_23	AC	21 ms; 7,672 KB
testcase_24	AC	21 ms; 7,672 KB
testcase_25	AC	22 ms; 7,672 KB
testcase_26	AC	21 ms; 7,668 KB
testcase_27	AC	20 ms; 7,668 KB

ソースコード

package main

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

func getNextString(scanner *bufio.Scanner) string {
	if !scanner.Scan() {
		panic("scan failed")
	}
	return scanner.Text()
}
func atoi(s string) int                             { x, _ := strconv.Atoi(s); return x }
func getNextInt(scanner *bufio.Scanner) int         { return atoi(getNextString(scanner)) }
func atoi64(s string) int64                         { x, _ := strconv.ParseInt(s, 10, 64); return x }
func getNextInt64(scanner *bufio.Scanner) int64     { return atoi64(getNextString(scanner)) }
func atof64(s string) float64                       { x, _ := strconv.ParseFloat(s, 64); return x }
func getNextFloat64(scanner *bufio.Scanner) float64 { return atof64(getNextString(scanner)) }
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	const (
		Inf = math.MaxInt64
	)
	aa := make([]int, n+1)
	for i := 0; i < n; i++ {
		aa[i+1] = getNextInt(scanner)
	}
	aa[0] = Inf
	ll := make([][2]int, n+2)
	for i := 2; i < n+2; i++ {
		ll[i][0] = max(ll[i][0], ll[i-1][0])
		ll[i][0] = max(ll[i][0], ll[i-1][1])
		ll[i][1] = max(ll[i][1], ll[i-1][0]+1)
		if aa[i-1] > aa[i-2] {
			ll[i][1] = max(ll[i][1], ll[i-1][1]+1)
		}
	}
	fmt.Fprintln(writer, max(ll[n+1][0], ll[n+1][1]))
}
func max(a, b int) int {
	if a < b {
		return b
	}
	return a
}
func min(a, b int) int { return -max(-a, -b) }
func abs(a int) int    { return max(a, -a) }