#977142 (Go) No.738 平らな農地

提出ソース

結果

問題	No.738 平らな農地
ユーザー	草苺奶昔
提出日時	2024-04-24 20:44:48
言語	Go (1.22.1)
結果	AC
実行時間	164 ms / 2,000 ms
コード長	15,542 bytes
コンパイル時間	13,209 ms
コンパイル使用メモリ	220,272 KB
実行使用メモリ	22,528 KB
最終ジャッジ日時	2024-11-07 05:43:49
合計ジャッジ時間	22,938 ms
ジャッジサーバーID （参考情報）	judge4 / judge1

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	1 ms 5,248 KB
testcase_01	AC	1 ms 5,248 KB
testcase_02	AC	1 ms 5,248 KB
testcase_03	AC	1 ms 5,248 KB
testcase_04	AC	1 ms 5,248 KB
testcase_05	AC	3 ms 5,248 KB
testcase_06	AC	5 ms 5,248 KB
testcase_07	AC	4 ms 5,248 KB
testcase_08	AC	2 ms 5,248 KB
testcase_09	AC	1 ms 5,248 KB
testcase_10	AC	2 ms 5,248 KB
testcase_11	AC	2 ms 5,248 KB
testcase_12	AC	1 ms 5,248 KB
testcase_13	AC	3 ms 5,248 KB
testcase_14	AC	2 ms 5,248 KB
testcase_15	AC	105 ms 20,096 KB
testcase_16	AC	106 ms 20,352 KB
testcase_17	AC	109 ms 20,352 KB
testcase_18	AC	106 ms 19,968 KB
testcase_19	AC	119 ms 21,376 KB
testcase_20	AC	105 ms 20,352 KB
testcase_21	AC	115 ms 20,992 KB
testcase_22	AC	108 ms 20,480 KB
testcase_23	AC	113 ms 20,864 KB
testcase_24	AC	114 ms 20,608 KB
testcase_25	AC	2 ms 5,248 KB
testcase_26	AC	2 ms 5,248 KB
testcase_27	AC	2 ms 5,248 KB
testcase_28	AC	2 ms 5,248 KB
testcase_29	AC	2 ms 5,248 KB
testcase_30	AC	2 ms 5,248 KB
testcase_31	AC	2 ms 5,248 KB
testcase_32	AC	2 ms 5,248 KB
testcase_33	AC	2 ms 5,248 KB
testcase_34	AC	2 ms 5,248 KB
testcase_35	AC	2 ms 5,248 KB
testcase_36	AC	2 ms 5,248 KB
testcase_37	AC	2 ms 5,248 KB
testcase_38	AC	2 ms 5,248 KB
testcase_39	AC	2 ms 5,248 KB
testcase_40	AC	3 ms 5,248 KB
testcase_41	AC	2 ms 5,248 KB
testcase_42	AC	2 ms 5,248 KB
testcase_43	AC	2 ms 5,248 KB
testcase_44	AC	2 ms 5,248 KB
testcase_45	AC	117 ms 22,144 KB
testcase_46	AC	108 ms 20,224 KB
testcase_47	AC	115 ms 21,632 KB
testcase_48	AC	107 ms 20,608 KB
testcase_49	AC	105 ms 20,352 KB
testcase_50	AC	109 ms 21,888 KB
testcase_51	AC	117 ms 21,632 KB
testcase_52	AC	106 ms 20,352 KB
testcase_53	AC	112 ms 21,504 KB
testcase_54	AC	117 ms 21,760 KB
testcase_55	AC	115 ms 21,632 KB
testcase_56	AC	112 ms 21,760 KB
testcase_57	AC	104 ms 20,096 KB
testcase_58	AC	111 ms 21,632 KB
testcase_59	AC	116 ms 22,144 KB
testcase_60	AC	118 ms 22,016 KB
testcase_61	AC	119 ms 21,888 KB
testcase_62	AC	109 ms 20,224 KB
testcase_63	AC	119 ms 22,144 KB
testcase_64	AC	116 ms 21,888 KB
testcase_65	AC	140 ms 20,352 KB
testcase_66	AC	143 ms 20,992 KB
testcase_67	AC	97 ms 20,992 KB
testcase_68	AC	100 ms 21,632 KB
testcase_69	AC	112 ms 21,888 KB
testcase_70	AC	109 ms 22,528 KB
testcase_71	AC	35 ms 7,680 KB
testcase_72	AC	52 ms 7,680 KB
testcase_73	AC	52 ms 7,808 KB
testcase_74	AC	61 ms 8,704 KB
testcase_75	AC	118 ms 20,864 KB
testcase_76	AC	112 ms 21,632 KB
testcase_77	AC	121 ms 20,864 KB
testcase_78	AC	132 ms 22,400 KB
testcase_79	AC	131 ms 22,528 KB
testcase_80	AC	118 ms 21,760 KB
testcase_81	AC	119 ms 21,120 KB
testcase_82	AC	122 ms 22,016 KB
testcase_83	AC	48 ms 8,448 KB
testcase_84	AC	50 ms 8,320 KB
testcase_85	AC	164 ms 21,888 KB
testcase_86	AC	147 ms 20,992 KB
testcase_87	AC	108 ms 21,504 KB
testcase_88	AC	104 ms 20,992 KB
testcase_89	AC	1 ms 5,248 KB
testcase_90	AC	1 ms 5,248 KB
testcase_91	AC	1 ms 5,248 KB

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ソースコード

raw source code

package main

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

func main() {
	// test()
	yuki738()
}

// No.738 平らな農地
// https://yukicoder.me/problems/no/738
// !滑动窗口所有数到中位数的距离和
func yuki738() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var n, k int32
	fmt.Fscan(in, &n, &k)
	nums := make([]int, n)
	for i := int32(0); i < n; i++ {
		fmt.Fscan(in, &nums[i])
	}
	wm := NewWaveletMatrixWithSum(nums, nums, -1, true)
	res := INF
	mf := NewMedianFinderWaveletMatrix(wm)
	for i := int32(0); i < n-k+1; i++ {
		start, end := i, i+k
		res = min(res, mf.DistSumToMedianRange(start, end))
	}
	fmt.Fprintln(out, res)
}

// waveletMatrix维护区间中位数信息.
type MedianFinderWaveletMatrix struct {
	Wm *WaveletMatrixWithSum
}

// WaveletMatrix 维护区间中位数信息.
// `Proxy 的内部持有一个对 WaveletMatrix 的引用`.
func NewMedianFinderWaveletMatrix(wm *WaveletMatrixWithSum) *MedianFinderWaveletMatrix {
	return &MedianFinderWaveletMatrix{Wm: wm}
}

func (mf *MedianFinderWaveletMatrix) Median() int {
	return mf.MedianRange(0, mf.Wm.n)
}

// 返回区间 [start, end) 中的中位数(如果有两个中位数，返回较小的那个).
func (mf *MedianFinderWaveletMatrix) MedianRange(start, end int32) int {
	if start < 0 {
		start = 0
	}
	if end > mf.Wm.n {
		end = mf.Wm.n
	}
	if start >= end {
		return 0
	}
	return mf.Wm.Median(start, end, false, 0)
}

func (mf *MedianFinderWaveletMatrix) DistSum(to int) int {
	return mf.DistSumRange(to, 0, mf.Wm.n)
}

func (mf *MedianFinderWaveletMatrix) DistSumRange(to int, start, end int32) int {
	if start < 0 {
		start = 0
	}
	if end > mf.Wm.n {
		end = mf.Wm.n
	}
	if start >= end {
		return 0
	}
	m := end - start
	less := mf.Wm.CountPrefix(start, end, WmValue(to), 0) // bisect_left
	allSum := mf.Wm.SumAll(start, end)
	if less == 0 {
		return allSum - int(m)*to
	}
	if less == m {
		return int(m)*to - allSum
	}
	sum1 := mf.Wm.SumPrefix(start, end, less, 0)
	sum2 := allSum - sum1
	leftSum := to*int(less) - sum1
	rightSum := sum2 - to*int(m-less)
	return leftSum + rightSum
}

func (mf *MedianFinderWaveletMatrix) DistSumToMedian() int {
	return mf.DistSumToMedianRange(0, mf.Wm.n)
}

func (mf *MedianFinderWaveletMatrix) DistSumToMedianRange(start, end int32) int {
	if start < 0 {
		start = 0
	}
	if end > mf.Wm.n {
		end = mf.Wm.n
	}
	if start >= end {
		return 0
	}

	m := end - start
	count1 := m / 2
	count2 := m - count1
	mid, sum1 := mf.Wm.KthValueAndSum(start, end, count1, 0)
	allSum := mf.Wm.SumAll(start, end)
	sum2 := allSum - sum1

	res := 0
	res += mid*int(count1) - sum1
	res += sum2 - mid*int(count2)
	return res
}

const INF WmValue = 1e18

type WmValue = int
type WmSum = int

func (*WaveletMatrixWithSum) e() WmSum            { return 0 }
func (*WaveletMatrixWithSum) op(a, b WmSum) WmSum { return a + b }
func (*WaveletMatrixWithSum) inv(a WmSum) WmSum   { return -a }

type WaveletMatrixWithSum struct {
	n, log   int32
	mid      []int32
	bv       []*BitVector
	key      []WmValue
	setLog   bool
	presum   [][]WmSum
	compress bool
}

// nums: 数组元素.
// sumData: 和数据，nil表示不需要和数据.
// log: 如果需要支持异或查询则需要传入log，-1表示默认.
// compress: 是否对nums进行离散化(值域较大(1e9)时可以离散化加速).
func NewWaveletMatrixWithSum(nums []WmValue, sumData []WmSum, log int32, compress bool) *WaveletMatrixWithSum {
	wm := &WaveletMatrixWithSum{}
	wm.build(nums, sumData, log, compress)
	return wm
}

func (wm *WaveletMatrixWithSum) build(nums []WmValue, sumData []WmSum, log int32, compress bool) {
	numsCopy := append(nums[:0:0], nums...)
	sumDataCopy := append(sumData[:0:0], sumData...)

	wm.n = int32(len(numsCopy))
	wm.log = log
	wm.compress = compress
	wm.setLog = log != -1
	if wm.n == 0 {
		wm.log = 0
		return
	}
	makeSum := len(sumData) > 0
	if compress {
		if wm.setLog {
			panic("compress and log should not be set at the same time")
		}
		wm.key = make([]WmValue, 0, wm.n)
		order := wm._argSort(numsCopy)
		for _, i := range order {
			if len(wm.key) == 0 || wm.key[len(wm.key)-1] != numsCopy[i] {
				wm.key = append(wm.key, numsCopy[i])
			}
			numsCopy[i] = WmValue(len(wm.key) - 1)
		}
	}
	if wm.log == -1 {
		tmp := wm._maxs(numsCopy)
		if tmp < 1 {
			tmp = 1
		}
		wm.log = int32(bits.Len(uint(tmp)))
	}
	wm.mid = make([]int32, wm.log)
	wm.bv = make([]*BitVector, wm.log)
	for i := range wm.bv {
		wm.bv[i] = NewBitVector(wm.n)
	}
	if makeSum {
		wm.presum = make([][]WmSum, 1+wm.log)
		for i := range wm.presum {
			sums := make([]WmSum, wm.n+1)
			for j := range sums {
				sums[j] = wm.e()
			}
			wm.presum[i] = sums
		}
	}
	if len(sumDataCopy) == 0 {
		sumDataCopy = make([]WmSum, len(numsCopy))
	}

	A, S := numsCopy, sumDataCopy
	A0, A1 := make([]WmValue, wm.n), make([]WmValue, wm.n)
	S0, S1 := make([]WmSum, wm.n), make([]WmSum, wm.n)
	for d := wm.log - 1; d >= -1; d-- {
		p0, p1 := int32(0), int32(0)
		if makeSum {
			tmp := wm.presum[d+1]
			for i := int32(0); i < wm.n; i++ {
				tmp[i+1] = wm.op(tmp[i], S[i])
			}
		}
		if d == -1 {
			break
		}
		for i := int32(0); i < wm.n; i++ {
			f := (A[i] >> d & 1) == 1
			if !f {
				if makeSum {
					S0[p0] = S[i]
				}
				A0[p0] = A[i]
				p0++
			} else {
				if makeSum {
					S1[p1] = S[i]
				}
				wm.bv[d].Set(i)
				A1[p1] = A[i]
				p1++
			}
		}
		wm.mid[d] = p0
		wm.bv[d].Build()
		A, A0 = A0, A
		S, S0 = S0, S
		for i := int32(0); i < p1; i++ {
			A[p0+i] = A1[i]
			S[p0+i] = S1[i]
		}
	}
}

// 区间 [start, end) 中范围在 [a, b) 中的元素的个数.
func (wm *WaveletMatrixWithSum) CountRange(start, end int32, a, b WmValue, xorVal WmValue) int32 {
	return wm.CountPrefix(start, end, b, xorVal) - wm.CountPrefix(start, end, a, xorVal)
}

func (wm *WaveletMatrixWithSum) SumRange(start, end, k1, k2 int32, xorVal WmValue) WmSum {
	if k1 < 0 {
		k1 = 0
	}
	if k2 > end-start {
		k2 = end - start
	}
	if k1 >= k2 {
		return wm.e()
	}
	add := wm.SumPrefix(start, end, k2, xorVal)
	sub := wm.SumPrefix(start, end, k1, xorVal)
	return wm.op(add, wm.inv(sub))
}

// 返回区间 [start, end) 中 范围在 [0, x) 中的元素的个数.
func (wm *WaveletMatrixWithSum) CountPrefix(start, end int32, x WmValue, xor WmValue) int32 {
	if xor != 0 {
		if !wm.setLog {
			panic("log should be set when xor is used")
		}
	}
	if wm.compress {
		x = wm._lowerBound(wm.key, x)
	}
	if x <= 0 {
		return 0
	}
	if x >= 1<<wm.log {
		return end - start
	}
	count := int32(0)
	for d := wm.log - 1; d >= 0; d-- {
		add := (x>>d)&1 == 1
		f := (xor>>d)&1 == 1
		l0, r0 := wm.bv[d].Rank(start, false), wm.bv[d].Rank(end, false)
		kf := int32(0)
		if f {
			kf = (end - start - r0 + l0)
		} else {
			kf = (r0 - l0)
		}
		if add {
			count += kf
			if f {
				start, end = l0, r0
			} else {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			}
		} else {
			if !f {
				start, end = l0, r0
			} else {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			}
		}
	}
	return count
}

// 返回区间 [start, end) 中 [0, k) 的和.
func (wm *WaveletMatrixWithSum) SumPrefix(start, end, k int32, xor WmValue) WmSum {
	_, sum := wm.KthValueAndSum(start, end, k, xor)
	return sum
}

// [start, end)区间内第k(k>=0)小的元素.
func (wm *WaveletMatrixWithSum) Kth(start, end, k int32, xorVal WmValue) WmValue {
	if xorVal != 0 {
		if !wm.setLog {
			panic("log should be set")
		}
	}
	count := int32(0)
	res := WmValue(0)
	for d := wm.log - 1; d >= 0; d-- {
		f := (xorVal>>d)&1 == 1
		l0, r0 := wm.bv[d].Rank(start, false), wm.bv[d].Rank(end, false)
		var c int32
		if f {
			c = (end - start) - (r0 - l0)
		} else {
			c = r0 - l0
		}
		if count+c > k {
			if !f {
				start, end = l0, r0
			} else {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			}
		} else {
			count += c
			res |= 1 << d
			if !f {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			} else {
				start, end = l0, r0
			}
		}
	}
	if wm.compress {
		res = wm.key[res]
	}
	return res
}

// 返回区间 [start, end) 中的 (第k小的元素, 前k个元素(不包括第k小的元素) 的 op 的结果).
// 如果k >= end-start, 返回 (-1, 区间 op 的结果).
func (wm *WaveletMatrixWithSum) KthValueAndSum(start, end, k int32, xorVal WmValue) (WmValue, WmSum) {
	if start >= end {
		return -1, wm.e()
	}
	if k >= end-start {
		return -1, wm.SumAll(start, end)
	}
	if xorVal != 0 {
		if !wm.setLog {
			panic("log should be set when xor is used")
		}
	}
	if len(wm.presum) == 0 {
		panic("sumData is not provided")
	}
	count := int32(0)
	sum := wm.e()
	res := WmValue(0)
	for d := wm.log - 1; d >= 0; d-- {
		f := (xorVal>>d)&1 == 1
		l0, r0 := wm.bv[d].Rank(start, false), wm.bv[d].Rank(end, false)
		c := int32(0)
		if f {
			c = (end - start) - (r0 - l0)
		} else {
			c = r0 - l0
		}
		if count+c > k {
			if !f {
				start, end = l0, r0
			} else {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			}
		} else {
			var s WmSum
			if f {
				s = wm._get(d, start+wm.mid[d]-l0, end+wm.mid[d]-r0)
			} else {
				s = wm._get(d, l0, r0)
			}
			count += c
			sum = wm.op(sum, s)
			res |= 1 << d
			if !f {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			} else {
				start, end = l0, r0
			}
		}
	}
	sum = wm.op(sum, wm._get(0, start, start+k-count))
	if wm.compress {
		res = wm.key[res]
	}
	return res, sum
}

// upper: 向上取中位数还是向下取中位数.
func (wm *WaveletMatrixWithSum) Median(start, end int32, upper bool, xorVal WmValue) WmValue {
	n := end - start
	var k int32
	if upper {
		k = n / 2
	} else {
		k = (n - 1) / 2
	}
	return wm.Kth(start, end, k, xorVal)
}

func (wm *WaveletMatrixWithSum) SumAll(start, end int32) WmSum {
	return wm._get(wm.log, start, end)
}

// 使得predicate(count, sum)为true的最大的(count, sum).
func (wm *WaveletMatrixWithSum) MaxRight(predicate func(int32, WmSum) bool, start, end int32, xorVal WmValue) (int32, WmSum) {
	if xorVal != 0 {
		if !wm.setLog {
			panic("log should be set when xor is used")
		}
	}
	if start == end {
		return end - start, wm.e()
	}
	if s := wm._get(wm.log, start, end); predicate(end-start, s) {
		return end - start, s
	}
	count := int32(0)
	sum := wm.e()
	for d := wm.log - 1; d >= 0; d-- {
		f := (xorVal>>d)&1 == 1
		l0, r0 := wm.bv[d].Rank(start, false), wm.bv[d].Rank(end, false)
		c := int32(0)
		if f {
			c = (end - start) - (r0 - l0)
		} else {
			c = (r0 - l0)
		}
		var s WmSum
		if f {
			s = wm._get(d, start+wm.mid[d]-l0, end+wm.mid[d]-r0)
		} else {
			s = wm._get(d, l0, r0)
		}
		if tmp := wm.op(sum, s); predicate(count+c, tmp) {
			count += c
			sum = tmp
			if f {
				start, end = l0, r0
			} else {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			}
		} else {
			if !f {
				start, end = l0, r0
			} else {
				start += wm.mid[d] - l0
				end += wm.mid[d] - r0
			}
		}
	}
	k := wm._binarySearch(func(k int32) bool {
		return predicate(count+k, wm.op(sum, wm._get(0, start, start+k)))
	}, 0, end-start)
	count += k
	sum = wm.op(sum, wm._get(0, start, start+k))
	return count, sum
}

// [start, end) 中小于等于 x 的数中最大的数
//
//	如果不存在则返回-INF
func (wm *WaveletMatrixWithSum) Floor(start, end int32, x WmValue, xor WmValue) WmValue {
	less := wm.CountPrefix(start, end, x, xor)
	if less == 0 {
		return -INF
	}
	res := wm.Kth(start, end, less-1, xor)
	return res
}

// [start, end) 中大于等于 x 的数中最小的数
//
//	如果不存在则返回INF
func (wm *WaveletMatrixWithSum) Ceil(start, end int32, x WmValue, xor WmValue) int {
	less := wm.CountPrefix(start, end, x, xor)
	if less == end-start {
		return INF
	}
	res := wm.Kth(start, end, less, xor)
	return res
}

func (wm *WaveletMatrixWithSum) _get(d, l, r int32) WmSum {
	return wm.op(wm.inv(wm.presum[d][l]), wm.presum[d][r])
}

func (wm *WaveletMatrixWithSum) _argSort(nums []WmValue) []int32 {
	order := make([]int32, len(nums))
	for i := range order {
		order[i] = int32(i)
	}
	sort.Slice(order, func(i, j int) bool { return nums[order[i]] < nums[order[j]] })
	return order
}

func (wm *WaveletMatrixWithSum) _maxs(nums []WmValue) WmValue {
	res := nums[0]
	for _, v := range nums {
		if v > res {
			res = v
		}
	}
	return res
}

func (wm *WaveletMatrixWithSum) _lowerBound(nums []WmValue, target WmValue) WmValue {
	left, right := int32(0), int32(len(nums)-1)
	for left <= right {
		mid := (left + right) >> 1
		if nums[mid] < target {
			left = mid + 1
		} else {
			right = mid - 1
		}
	}
	return WmValue(left)
}

func (wm *WaveletMatrixWithSum) _binarySearch(f func(int32) bool, ok, ng int32) int32 {
	for abs32(ok-ng) > 1 {
		x := (ok + ng) >> 1
		if f(x) {
			ok = x
		} else {
			ng = x
		}
	}
	return ok
}

type BitVector struct {
	bits   []uint64
	preSum []int32
}

func NewBitVector(n int32) *BitVector {
	return &BitVector{bits: make([]uint64, n>>6+1), preSum: make([]int32, n>>6+1)}
}

func (bv *BitVector) Set(i int32) {
	bv.bits[i>>6] |= 1 << (i & 63)
}

func (bv *BitVector) Build() {
	for i := 0; i < len(bv.bits)-1; i++ {
		bv.preSum[i+1] = bv.preSum[i] + int32(bits.OnesCount64(bv.bits[i]))
	}
}

func (bv *BitVector) Rank(k int32, f bool) int32 {
	m, s := bv.bits[k>>6], bv.preSum[k>>6]
	res := s + int32(bits.OnesCount64(m&((1<<(k&63))-1)))
	if f {
		return res
	}
	return k - res
}

func abs(x int) int {
	if x < 0 {
		return -x
	}
	return x
}

func abs32(x int32) int32 {
	if x < 0 {
		return -x
	}
	return x
}

func min32(a, b int32) int32 {
	if a < b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func test() {

	medianBruteForce := func(nums []int) int {
		if len(nums) == 0 {
			return 0
		}
		sortedNums := append([]int(nil), nums...)
		sort.Ints(sortedNums)
		mid := (len(sortedNums) - 1) / 2
		return sortedNums[mid]
	}

	distSumBruteForce := func(nums []int, to int) int {
		res := 0
		for _, num := range nums {
			res += abs(num - to)
		}
		return res
	}

	distSumRangeBruteForce := func(nums []int, to, start, end int) int {
		res := 0
		for i := start; i < end; i++ {
			res += abs(nums[i] - to)
		}
		return res
	}

	distSumToMedianBruteForce := func(nums []int) int {
		median := medianBruteForce(nums)
		return distSumBruteForce(nums, median)
	}

	distSumToMedianRangeBruteForce := func(nums []int, start, end int) int {
		median := medianBruteForce(nums[start:end])
		return distSumRangeBruteForce(nums, median, start, end)
	}

	for tc := 0; tc < 1000; tc++ {
		n := rand.Intn(1000) + 1
		nums := make([]int, n)
		for i := 0; i < n; i++ {
			nums[i] = rand.Intn(1e6) - 5e5
		}
		mf := NewMedianFinderWaveletMatrix(NewWaveletMatrixWithSum(nums, nums, -1, true))

		for i := 0; i < 100; i++ {
			start, end := rand.Intn(n), rand.Intn(n)+1
			if start > end {
				start, end = end, start
			}
			to := rand.Intn(1e5) - 5e4

			if mf.MedianRange(int32(start), int32(end)) != medianBruteForce(nums[start:end]) {
				panic("err0")
			}
			if mf.DistSum(int(to)) != distSumBruteForce(nums, to) {
				panic("err1")
			}
			if mf.DistSumRange(int(to), int32(start), int32(end)) != distSumRangeBruteForce(nums, to, start, end) {
				panic("err2")
			}
			if mf.DistSumToMedian() != distSumToMedianBruteForce(nums) {
				panic("err3")
			}
			if mf.DistSumToMedianRange(int32(start), int32(end)) != distSumToMedianRangeBruteForce(nums, start, end) {
				fmt.Println(mf.DistSumToMedianRange(int32(start), int32(end)), distSumToMedianRangeBruteForce(nums, start, end))
				panic("err4")
			}
		}
	}

	fmt.Println("pass")
}