#482933 (Go) No.944 煎っぞ!

• 問題: No.944 煎っぞ!
• ユーザー: ccppjsrb
• 提出日時: 2020-05-16 22:29:29
• 言語: Go (1.22.1)
• 結果: AC
• 実行時間: 12 ms / 3,000 ms
• コード長: 2,213 bytes
• コンパイル時間: 11,573 ms
• コンパイル使用メモリ: 214,180 KB
• 実行使用メモリ: 5,496 KB
• 最終ジャッジ日時: 2023-10-24 04:14:57
• 合計ジャッジ時間: 12,678 ms
• ジャッジサーバーID （参考情報）: judge12 / judge15

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	6 ms; 5,496 KB
testcase_01	AC	6 ms; 5,496 KB
testcase_02	AC	6 ms; 5,496 KB
testcase_03	AC	6 ms; 5,496 KB
testcase_04	AC	6 ms; 5,496 KB
testcase_05	AC	5 ms; 5,496 KB
testcase_06	AC	6 ms; 5,496 KB
testcase_07	AC	6 ms; 5,496 KB
testcase_08	AC	6 ms; 5,496 KB
testcase_09	AC	5 ms; 5,496 KB
testcase_10	AC	1 ms; 4,348 KB
testcase_11	AC	2 ms; 4,348 KB
testcase_12	AC	2 ms; 4,348 KB
testcase_13	AC	1 ms; 4,348 KB
testcase_14	AC	2 ms; 4,348 KB
testcase_15	AC	2 ms; 4,348 KB
testcase_16	AC	2 ms; 4,348 KB
testcase_17	AC	2 ms; 4,348 KB
testcase_18	AC	2 ms; 4,348 KB
testcase_19	AC	2 ms; 4,348 KB
testcase_20	AC	7 ms; 5,496 KB
testcase_21	AC	7 ms; 5,496 KB
testcase_22	AC	6 ms; 5,496 KB
testcase_23	AC	5 ms; 5,496 KB
testcase_24	AC	5 ms; 5,496 KB
testcase_25	AC	6 ms; 5,496 KB
testcase_26	AC	6 ms; 5,496 KB
testcase_27	AC	6 ms; 5,496 KB
testcase_28	AC	1 ms; 4,348 KB
testcase_29	AC	1 ms; 4,348 KB
testcase_30	AC	6 ms; 5,496 KB
testcase_31	AC	12 ms; 5,496 KB
testcase_32	AC	9 ms; 5,496 KB
testcase_33	AC	8 ms; 5,496 KB
testcase_34	AC	8 ms; 5,496 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)
	}
	for i := 1; i < n; i++ {
		aa[i] += aa[i-1]
	}
	dd := divisors(aa[n-1])
	for i := 0; i < len(dd); i++ {
		if ok(aa[n-1]/dd[i], dd[i], aa) {
			fmt.Fprintln(writer, aa[n-1]/dd[i])
			return
		}
	}
}
func ok(c, d int, aa []int) bool {
	n := len(aa)
	for i := 0; i < c; i++ {
		l := -1
		r := n
		for l+1 < r {
			m := (l + r) >> 1
			if aa[m] < d*(i+1) {
				l = m
				continue
			}
			r = m
		}
		if r == n {
			return false
		}
		if aa[r] != d*(i+1) {
			return false
		}
	}

	return true
}

func divisors(n int) []int {
	dd := make([]int, 0)
	dd = append(dd, n)
	dd = append(dd, 1)
	for i := 2; i*i <= n; i++ {
		if n%i == 0 {
			dd = append(dd, i)
			if i*i == n {
				continue
			}
			dd = append(dd, n/i)
		}
	}
	sort.Ints(dd)
	return dd
}