結果

問題 No.5010 Better Mo's Algorithm is Needed!! (Unweighted)
ユーザー ID 21712
提出日時 2025-01-27 02:04:18
言語 Go
(1.23.4)
結果
AC  
実行時間 3,905 ms / 5,000 ms
コード長 5,005 bytes
コンパイル時間 12,440 ms
コンパイル使用メモリ 238,292 KB
実行使用メモリ 49,980 KB
スコア 18,113,977,559
最終ジャッジ日時 2025-01-27 02:11:57
合計ジャッジ時間 422,392 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge3
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ファイルパターン 結果
other AC * 120
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ソースコード

diff # 

package main

import (
	. "fmt"
	. "os"
	bf "bufio"
	"container/list"
	"math"
	"math/rand"
)

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

func max(a,b int) int {
	return a+b-min(a,b)
}

func parttime(ls,rs,p []int, i,j int) (t int64) {
	pi := p[i]
	a, b := ls[pi], rs[pi]
	pj := p[j]
	c, d := ls[pj], rs[pj]
	x,y:=min(a,c),max(a,c)
	u,v:=min(b,d),max(b,d)
	t += int64(y-x)*100
	t += int64(v-u)*100
	return
}

func main() {
	rd:=bf.NewReader(Stdin)
	wr:=bf.NewWriter(Stdout)
	defer wr.Flush()
	
	var n,q,wt,st int
	Fscan(rd,&n,&q,&wt,&st)
	ws := make([]int, n)
	ls := make([]int, q)
	rs := make([]int, q)
	p := make([]int, q)
	for i := range ws {
		Fscan(rd,&ws[i])
	}
	for i := range ls {
		Fscan(rd,&ls[i],&rs[i])
		p[i] = i
	}
	tt := make([][][]int, 50)
	tte := make([][][]*list.Element, 50)
	for i := range tt {
		tt[i] = make([][]int, 50)
		tte[i] = make([][]*list.Element, 50)
	}
	for i,vl := range ls {
		vr := rs[i]
		rl := (vr-vl)/4000
		vg := (vr+vl)/8000
		tt[rl][vg] = append(tt[rl][vg], i)
	}
	used := make([]bool, q)
	plist := list.New()
	loop1:
	for rl,tt0 := range tt {
		var best int64 = math.MaxInt64
		var bestvg int = -1
		var bestti int = -1
		for vg,tt1:= range tt0 {
			for i, t := range tt1 {
				value := int64(rs[t]-ls[t]+1)*100
				if value < best {
					best =  value
					bestvg = vg
					bestti = i
				}
			}
		}
		if best < math.MaxInt64 {
			tt1 := tt0[bestvg]
			tt1[0],tt1[bestti] = tt1[bestti],tt1[0]
			i := tt1[0]
			tt[rl][bestvg] = tt1[1:]
			elem := plist.PushBack(i)
			tte[rl][bestvg] = append(tte[rl][bestvg], elem)
			used[i] = true
			break loop1
		}
	}
	for _, rl := range rand.Perm(50) {
		for _, vg := range rand.Perm(50) {
			if len(tt[rl][vg]) == 0 || len(tte[rl][vg]) > 0 {
				continue
			}
			t := tt[rl][vg][0]
			elem := plist.Front()
			var best int64
			var bestElem *list.Element
			{
				i := elem.Value.(int)
				best = -int64(rs[i]-ls[i]+1)*100
				best += int64(rs[t]-ls[t]+1)*100
				best += parttime(ls,rs,p, t, i)
			}
			for elem != nil {
				i := elem.Value.(int)
				next := elem.Next()
				if next != nil {
					k := next.Value.(int)
					diff := -parttime(ls,rs,p, i,k)
					diff += parttime(ls,rs,p, i,t)
					diff += parttime(ls,rs,p, t,k)
					if diff < best {
						best = diff
						bestElem = elem
					}
				} else {
					diff := parttime(ls,rs,p, i,t)
					if diff < best {
						best = diff
						bestElem = elem
					}
				}
				elem = next
			}
			if bestElem != nil {
				newElem := plist.InsertAfter(t, bestElem)
				tt[rl][vg] = tt[rl][vg][1:]
				tte[rl][vg] = append(tte[rl][vg], newElem)
				used[t] = true
			} else {
				elem = plist.Front()
				newElem := plist.InsertBefore(t, elem)
				tt[rl][vg] = tt[rl][vg][1:]
				tte[rl][vg] = append(tte[rl][vg], newElem)
				used[t] = true
			}
		}
	}
	for rl, tt0 := range tt {
		for vg, tt1 := range tt0 {
			for _, t := range tt1 {
				var best int64 = math.MaxInt64
				var bestElem *list.Element
				for _, elem := range tte[rl][vg] {
					i := elem.Value.(int)
					if prev := elem.Prev(); prev != nil {
						j := prev.Value.(int)
						diff :=-parttime(ls,rs,p, j, i)
						diff += parttime(ls,rs,p, j, t)
						diff += parttime(ls,rs,p, t, i)
						if diff < best {
							best = diff
							bestElem = prev
						}
					} else {
						diff :=-int64(rs[i]-ls[i]+1)*100
						diff += int64(rs[t]-ls[t]+1)*100
						diff += parttime(ls,rs,p, t, i)
						if diff < best {
							best = diff
							bestElem = nil
						}
					}
					if next := elem.Next(); next != nil {
						j := next.Value.(int)
						diff :=-parttime(ls,rs,p, i, j)
						diff += parttime(ls,rs,p, i, t)
						diff += parttime(ls,rs,p, t, j)
						if diff < best {
							best = diff
							bestElem = elem
						}
					} else {
						diff := parttime(ls,rs,p, i, t)
						if diff < best {
							best = diff
							bestElem = elem
						}
					}
				}
				if best < math.MaxInt64 {
					if bestElem != nil {
						newElem := plist.InsertAfter(t, bestElem)
						tte[rl][vg] = append(tte[rl][vg], newElem)
						used[t] = true
					} else {
						bestElem = plist.Front()
						newElem := plist.InsertBefore(t, bestElem)
						tte[rl][vg] = append(tte[rl][vg], newElem)
						used[t] = true
					}
				}
			}
		}
	}
	
	if plist.Len() == len(p) {
		p = p[:0]
		elem := plist.Front()
		for elem != nil {
			p = append(p, elem.Value.(int))
			elem = elem.Next()
		}
	}

	for j := 0; j < 100; j++ {
		for i := range rand.Perm(q) {
			k := min(rand.Intn(q/2500+1)+i+1,q-1)
			f,g := min(i,k), max(i,k)
			var t0,t1 int64
			if f > 0 {
				t0 += parttime(ls,rs,p,f-1,f)
				t1 += parttime(ls,rs,p,f-1,g)
			} else {
				t0 += int64(rs[p[f]]-ls[p[f]]+1)*100
				t1 += int64(rs[p[g]]-rs[p[g]]+1)*100
			}
			if g+1 < len(p) {
				t0 += parttime(ls,rs,p,g,g+1)
				t1 += parttime(ls,rs,p,f,g+1)
			}
			if t0 >= t1 {
				for ; f<g ; f,g =f+1,g-1 {
					p[f],p[g]=p[g],p[f]
				}
			}
		}
	}

	for i,vp := range p {
		if i > 0 {
			Fprint(wr, " ")
		}
		Fprint(wr, vp+1)
	}
	Fprintln(wr)
}
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