#634756 (Go) No.1441 MErGe

• 問題: No.1441 MErGe
• ユーザー: c-yan
• 提出日時: 2021-03-26 22:45:11
• 言語: Go (1.22.1)
• 結果: WA
• 実行時間: -
• コード長: 2,148 bytes
• コンパイル時間: 11,988 ms
• コンパイル使用メモリ: 222,436 KB
• 実行使用メモリ: 13,396 KB
• 最終ジャッジ日時: 2024-11-29 00:40:36
• 合計ジャッジ時間: 16,872 ms
• ジャッジサーバーID （参考情報）: judge4 / judge5

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 6,816 KB
testcase_01	WA	-
testcase_02	AC	1 ms; 6,816 KB
testcase_03	WA	-
testcase_04	WA	-
testcase_05	WA	-
testcase_06	WA	-
testcase_07	WA	-
testcase_08	WA	-
testcase_09	WA	-
testcase_10	WA	-
testcase_11	WA	-
testcase_12	WA	-
testcase_13	WA	-
testcase_14	WA	-
testcase_15	WA	-
testcase_16	WA	-
testcase_17	WA	-
testcase_18	WA	-
testcase_19	WA	-
testcase_20	WA	-
testcase_21	WA	-
testcase_22	WA	-
testcase_23	WA	-
testcase_24	WA	-
testcase_25	WA	-
testcase_26	WA	-
testcase_27	WA	-
testcase_28	AC	93 ms; 9,600 KB
testcase_29	WA	-

ソースコード

package main

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

type segmentTree struct {
	data   []int
	offset int
}

func newSegmentTree(n int) segmentTree {
	var result segmentTree
	t := 1
	for t < n {
		t *= 2
	}
	result.offset = t - 1
	result.data = make([]int, 2*t-1)
	return result
}

func (st segmentTree) updateAll(a []int) {
	for i, v := range a {
		st.data[st.offset+i] = v
	}
	for i := st.offset - 1; i > -1; i-- {
		st.data[i] = st.data[i*2+1] + st.data[i*2+2]
	}
}

func (st segmentTree) add(index, value int) {
	i := st.offset + index
	st.data[i] += value
	for i >= 1 {
		i = (i - 1) / 2
		st.data[i] = st.data[i*2+1] + st.data[i*2+2]
	}
}

func (st segmentTree) update(index, value int) {
	i := st.offset + index
	st.data[i] = value
	for i >= 1 {
		i = (i - 1) / 2
		st.data[i] = st.data[i*2+1] + st.data[i*2+2]
	}
}

func (st segmentTree) query(start, stop int) int {
	result := 0
	l := start + st.offset
	r := stop + st.offset
	for l < r {
		if l&1 == 0 {
			result += st.data[l]
		}
		if r&1 == 0 {
			result += st.data[r-1]
		}
		l = l / 2
		r = (r - 1) / 2
	}
	return result
}

func main() {
	defer flush()

	N := readInt()
	Q := readInt()

	A := make([]int, N)
	for i := 0; i < N; i++ {
		A[i] = readInt()
	}

	st1 := newSegmentTree(N)
	st2 := newSegmentTree(N)
	st2.updateAll(A)
	for i := 0; i < Q; i++ {
		T := readInt()
		l := readInt() - 1
		r := readInt() - 1

		x := l + st1.query(0, l)
		y := r + st1.query(0, r)
		if T == 1 {
			st1.add(x, y-x)
		} else if T == 2 {
			println(st2.query(x, y+1))
		}
	}

}

const (
	ioBufferSize = 1 * 1024 * 1024 // 1 MB
)

var stdinScanner = func() *bufio.Scanner {
	result := bufio.NewScanner(os.Stdin)
	result.Buffer(make([]byte, ioBufferSize), ioBufferSize)
	result.Split(bufio.ScanWords)
	return result
}()

func readString() string {
	stdinScanner.Scan()
	return stdinScanner.Text()
}

func readInt() int {
	result, err := strconv.Atoi(readString())
	if err != nil {
		panic(err)
	}
	return result
}

var stdoutWriter = bufio.NewWriter(os.Stdout)

func flush() {
	stdoutWriter.Flush()
}

func println(args ...interface{}) (int, error) {
	return fmt.Fprintln(stdoutWriter, args...)
}