結果

問題 No.1418 Sum of Sum of Subtree Size
ユーザー dot_haraaidot_haraai
提出日時 2021-06-04 00:36:35
言語 Nim
(2.0.2)
結果
AC  
実行時間 278 ms / 2,000 ms
コード長 3,127 bytes
コンパイル時間 5,028 ms
コンパイル使用メモリ 87,168 KB
実行使用メモリ 48,512 KB
最終ジャッジ日時 2024-04-28 19:45:47
合計ジャッジ時間 10,753 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
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
5,248 KB
testcase_01 AC 1 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 271 ms
38,784 KB
testcase_04 AC 278 ms
38,784 KB
testcase_05 AC 270 ms
38,784 KB
testcase_06 AC 271 ms
38,784 KB
testcase_07 AC 275 ms
38,784 KB
testcase_08 AC 165 ms
27,136 KB
testcase_09 AC 61 ms
14,592 KB
testcase_10 AC 68 ms
15,360 KB
testcase_11 AC 33 ms
9,856 KB
testcase_12 AC 120 ms
22,272 KB
testcase_13 AC 149 ms
25,728 KB
testcase_14 AC 159 ms
26,752 KB
testcase_15 AC 108 ms
20,608 KB
testcase_16 AC 10 ms
5,376 KB
testcase_17 AC 11 ms
5,376 KB
testcase_18 AC 246 ms
35,712 KB
testcase_19 AC 29 ms
9,088 KB
testcase_20 AC 5 ms
5,376 KB
testcase_21 AC 103 ms
20,352 KB
testcase_22 AC 87 ms
17,792 KB
testcase_23 AC 6 ms
5,376 KB
testcase_24 AC 7 ms
5,376 KB
testcase_25 AC 5 ms
5,376 KB
testcase_26 AC 7 ms
5,376 KB
testcase_27 AC 3 ms
5,376 KB
testcase_28 AC 3 ms
5,376 KB
testcase_29 AC 8 ms
5,376 KB
testcase_30 AC 7 ms
5,376 KB
testcase_31 AC 4 ms
5,376 KB
testcase_32 AC 5 ms
5,376 KB
testcase_33 AC 32 ms
13,312 KB
testcase_34 AC 165 ms
48,512 KB
testcase_35 AC 66 ms
22,144 KB
testcase_36 AC 17 ms
7,424 KB
testcase_37 AC 201 ms
36,608 KB
testcase_38 AC 180 ms
33,920 KB
testcase_39 AC 1 ms
5,376 KB
testcase_40 AC 2 ms
5,376 KB
testcase_41 AC 1 ms
5,376 KB
testcase_42 AC 2 ms
5,376 KB
testcase_43 AC 2 ms
5,376 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
/home/judge/data/code/Main.nim(2, 18) Warning: Use the new 'sugar' module instead; future is deprecated [Deprecated]
/home/judge/data/code/Main.nim(1, 8) Warning: imported and not used: 'times' [UnusedImport]
/home/judge/data/code/Main.nim(2, 26) Warning: imported and not used: 'strformat' [UnusedImport]
/home/judge/data/code/Main.nim(2, 18) Warning: imported and not used: 'future' [UnusedImport]
/home/judge/data/code/Main.nim(2, 37) Warning: imported and not used: 'deques' [UnusedImport]
/home/judge/data/code/Main.nim(1, 41) Warning: imported and not used: 'algorithm' [UnusedImport]
/home/judge/data/code/Main.nim(1, 52) Warning: imported and not used: 'tables' [UnusedImport]
/home/judge/data/code/Main.nim(1, 60) Warning: imported and not used: 'sets' [UnusedImport]
/home/judge/data/code/Main.nim(1, 66) Warning: imported and not used: 'lists' [UnusedImport]
/home/judge/data/code/Main.nim(1, 73) Warning: imported and not used: 'intsets' [UnusedImport]
/home/judge/data/code/Main.nim(2, 8) Warning: imported and not used: 'critbits' [UnusedImport]

ソースコード

diff #

import times, strutils, sequtils, math, algorithm, tables, sets, lists, intsets
import critbits, future, strformat, deques
template `max=`(x,y) = x = max(x,y)
template `min=`(x,y) = x = min(x,y)
template `mod=`(x,y) = x = x mod y
template scan2 = (scan(), scan())
template scan3 = (scan(), scan())
let read* = iterator: string {.closure.} =
    while true: (for s in stdin.readLine.split: yield s)
proc scan(): int = read().parseInt
proc scanf(): float = read().parseFloat
proc toInt(c:char): int =
    return int(c) - int('0')




proc solve():int=
  var
    n = scan()
    es = newseqwith(n,newseq[int]())
    sumTo = newseq[seq[int]](n)
    sizeTo = newseq[seq[int]](n)
    cumScoreL = newseq[seq[int]](n)
    cumScoreR = newseq[seq[int]](n)
    cumSizeL = newseq[seq[int]](n)
    cumSizeR = newseq[seq[int]](n)
    parIdx = newseqwith(n,0)
  for i in 0..<n-1:
    var
      a = scan()-1
      b = scan()-1
    es[a].add(b)
    es[b].add(a)
  var s = -1
  # 始点を探す
  for i in 0..<n:
    if es[i].len==1:
      s = i
      break
  for i in 0..<n:
    sumTo[i] = newseqwith(es[i].len,0)
    sizeTo[i] = newseqwith(es[i].len,0)
    

  

  # return
  # (部分木のサイズ,部分木のスコア)
  proc dfs(par,p:int):(int,int)=
    
    #if es[p].len==1 and es[p][0]==par:return (1,1)
    for idx,nxt in es[p]:
      if par==nxt:
        # 親のインデックスが分かっていると全方位木DPのときに親を除くのが楽
        parIdx[p]=idx
        continue
      (sizeTo[p][idx],sumTo[p][idx]) = dfs(p,nxt)
    cumScoreL[p] = newseq[int](es[p].len+1)
    cumScoreR[p] = newseq[int](es[p].len+1)
    cumSizeL[p] = newseq[int](es[p].len+1)
    cumSizeR[p] = newseq[int](es[p].len+1)
    for idx in 0..<es[p].len:
      cumSizeL[p][idx+1] = cumSizeL[p][idx]+sizeTo[p][idx]
      cumScoreL[p][idx+1] = cumScoreL[p][idx]+sumTo[p][idx]
    for idx in countdown(es[p].len-1,0):
      cumSizeR[p][idx] = cumSizeR[p][idx+1]+sizeTo[p][idx]
      cumScoreR[p][idx] = cumScoreR[p][idx+1]+sumTo[p][idx]
    return (cumSizeR[p][0]+1,cumScoreR[p][0]+cumSizeR[p][0]+1)
  
  discard dfs(-1,s)

  var res = 0
  var resNodes = newseqwith(n,0)
  proc dpfs(par,p,parScore:int)=
    #echo fmt"(par, p, score) = ({par}, {p}, {parScore})"
      # 足すもの
      # ・親方向の自分を含まない子要素のスコア:全方位木DPの根拠
      # ・自分を親とする部分木のサイズ = 常にnでは???
      # ・子方向の自分を含まない子要素のスコアの総和
    resNodes[p] = parScore+n+cumScoreR[p][0]+n-(cumSizeR[p][0]+1)
    res+=parScore+n+cumScoreR[p][0]
    res+=n-(cumSizeR[p][0]+1)
    #res+=n-cumSizeR[p][0]
    for idx,nxt in es[p]:
      if par==nxt:continue
      dpfs(p,nxt,cumScoreL[p][idx]+cumScoreR[p][idx+1]+parScore+n-(cumSizeR[p][0]+1))




  
  #echo sumTo.join("\n")
  #echo ""
  #echo sizeTo.join("\n")
  #echo ""
  #echo cumScoreL.join("\n")
  #echo ""
  #echo cumScoreR.join("\n")
  #echo "cumSizeL:"
  #echo cumSizeL.join("\n")
  #echo "cumSizeR:"
  #echo cumSizeR.join("\n")
  dpfs(-1,s,0)
  #echo resNodes
  return res


  
  
  



echo solve()
0