結果

問題 No.1097 Remainder Operation
ユーザー 草苺奶昔草苺奶昔
提出日時 2023-02-15 16:25:51
言語 Go
(1.22.1)
結果
AC  
実行時間 316 ms / 2,000 ms
コード長 2,590 bytes
コンパイル時間 12,365 ms
コンパイル使用メモリ 214,448 KB
実行使用メモリ 70,768 KB
最終ジャッジ日時 2023-09-25 01:10:25
合計ジャッジ時間 20,529 ms
ジャッジサーバーID
(参考情報)
judge11 / judge12
このコードへのチャレンジ
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テストケース

テストケース表示
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 1 ms
4,380 KB
testcase_02 AC 1 ms
4,376 KB
testcase_03 AC 1 ms
4,376 KB
testcase_04 AC 2 ms
4,384 KB
testcase_05 AC 2 ms
4,380 KB
testcase_06 AC 1 ms
4,380 KB
testcase_07 AC 22 ms
9,984 KB
testcase_08 AC 23 ms
9,984 KB
testcase_09 AC 22 ms
9,988 KB
testcase_10 AC 23 ms
9,988 KB
testcase_11 AC 23 ms
9,984 KB
testcase_12 AC 243 ms
70,764 KB
testcase_13 AC 253 ms
70,764 KB
testcase_14 AC 261 ms
70,768 KB
testcase_15 AC 265 ms
70,764 KB
testcase_16 AC 250 ms
70,764 KB
testcase_17 AC 181 ms
70,768 KB
testcase_18 AC 157 ms
70,704 KB
testcase_19 AC 208 ms
70,700 KB
testcase_20 AC 207 ms
70,700 KB
testcase_21 AC 316 ms
70,700 KB
testcase_22 AC 316 ms
70,700 KB
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ソースコード

diff #

package main

import (
	"bufio"
	"fmt"
	"math/bits"
	"os"
)

func main() {
	// https://yukicoder.me/problems/no/1097
	const INF int = int(1e18)
	const MOD int = 998244353

	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var n int
	fmt.Fscan(in, &n)
	nums := make([]int, n)
	for i := 0; i < n; i++ {
		fmt.Fscan(in, &nums[i])
	}

	db := NewDoubling(n, 1e12+10)
	for i := 0; i < n; i++ {
		db.Add(i, (i+nums[i])%n, nums[i])
	}
	db.Build()

	var q int
	fmt.Fscan(in, &q)
	for i := 0; i < q; i++ {
		var k int
		fmt.Fscan(in, &k)
		_, res := db.Jump(0, k)
		fmt.Fprintln(out, res)
	}
}

type E = int

func (*Doubling) e() E          { return 0 }
func (*Doubling) op(e1, e2 E) E { return e1 + e2 }

type Doubling struct {
	n          int
	log        int
	isPrepared bool
	to         [][]int
	dp         [][]E
}

func NewDoubling(n, maxStep int) *Doubling {
	res := &Doubling{}
	res.n = n
	res.log = bits.Len(uint(maxStep))
	res.to = make([][]int, res.log)
	res.dp = make([][]E, res.log)
	for i := 0; i < res.log; i++ {
		res.to[i] = make([]int, n)
		res.dp[i] = make([]E, n)
		for j := 0; j < n; j++ {
			res.to[i][j] = -1
			res.dp[i][j] = res.e()
		}
	}
	return res
}

// 初始状态(leaves):从 `from` 状态到 `to` 状态,值变为 `value`.
//  0 <= from, to < n
func (d *Doubling) Add(from, to int, value E) {
	if d.isPrepared {
		panic("Doubling is prepared")
	}
	if to < -1 || to >= d.n {
		panic("to is out of range")
	}

	d.to[0][from] = to
	d.dp[0][from] = value
}

func (d *Doubling) Build() {
	if d.isPrepared {
		panic("Doubling is prepared")
	}

	d.isPrepared = true
	for k := 0; k < d.log-1; k++ {
		for v := 0; v < d.n; v++ {
			w := d.to[k][v]
			if w == -1 {
				d.to[k+1][v] = -1
				d.dp[k+1][v] = d.dp[k][v]
				continue
			}
			d.to[k+1][v] = d.to[k][w]
			d.dp[k+1][v] = d.op(d.dp[k][v], d.dp[k][w])
		}
	}
}

func (d *Doubling) Jump(from, step int) (to int, res E) {
	if !d.isPrepared {
		panic("Doubling is not prepared")
	}
	if step >= 1<<d.log {
		panic("step is over max step")
	}

	res = d.e()
	to = from
	for k := 0; k < d.log; k++ {
		if to == -1 {
			break
		}

		if step&(1<<k) != 0 {
			res = d.op(res, d.dp[k][to])
			to = d.to[k][to]
		}
	}
	return
}

func (d *Doubling) MaxStep(from int, check func(e E) bool) int {
	if !d.isPrepared {
		panic("Doubling is not prepared")
	}

	res := d.e()
	step := 0
	if !check(res) {
		return 0
	}

	for k := d.log - 1; k >= 0; k-- {
		to := d.to[k][from]
		next := d.op(res, d.dp[k][from])
		if check(next) {
			step |= 1 << k
			from = to
			res = next
		}
	}

	return step
}
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