結果
| 問題 |
No.1488 Max Score of the Tree
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-05-31 10:45:06 |
| 言語 | Nim (2.2.0) |
| 結果 |
AC
|
| 実行時間 | 158 ms / 2,000 ms |
| コード長 | 1,745 bytes |
| コンパイル時間 | 3,744 ms |
| コンパイル使用メモリ | 87,552 KB |
| 実行使用メモリ | 81,536 KB |
| 最終ジャッジ日時 | 2024-11-08 21:08:29 |
| 合計ジャッジ時間 | 6,826 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 29 |
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
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()=
var
n = scan()
k = scan()
es = newseqwith(n,newseq[int]())
cost = newseqwith(n,newseq[int]())
esu = newseqwith(n,newseq[int]())
for i in 0..<n-1:
var
(a,b,c)=(scan()-1,scan()-1,scan())
es[a].add(b)
es[b].add(a)
cost[a].add(c)
cost[b].add(c)
esu[a].add(0)
esu[b].add(0)
proc dfs(par,p:int):int=
if es[p].len==1 and es[p][0]==par:
return 1
for idx, nxt in es[p]:
if nxt == par:continue
var t = dfs(p,nxt)
esu[p][idx]=t
result+=t
discard dfs(-1,0)
# 各辺の使用回数を計算
var
edge = newseq[int]()
score = newseq[int]()
base = 0
for p in 0..<n:
for (c,m) in zip(cost[p],esu[p]):
if m!=0:
base+=c*m
edge.add(c)
score.add(m*c)
var
m = edge.len
dp = newseqwith(m+1,newseqwith(k+1,0))
# dp[i][j] := i個目の辺まで見たときに選んだ辺の総和がjであるときに得られるスコアの最大値
for i in 1..m:
for j in 0..k:
if j - edge[i-1]>=0:
dp[i][j] = max(dp[i-1][j-edge[i-1]]+score[i-1],dp[i-1][j])
else:
dp[i][j].max= dp[i-1][j]
echo dp[m].max() + base
solve()