結果
| 問題 |
No.1254 補強への架け橋
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-06-05 20:51:37 |
| 言語 | Nim (2.2.0) |
| 結果 |
AC
|
| 実行時間 | 179 ms / 2,000 ms |
| コード長 | 2,120 bytes |
| コンパイル時間 | 4,517 ms |
| コンパイル使用メモリ | 88,960 KB |
| 実行使用メモリ | 25,984 KB |
| 最終ジャッジ日時 | 2024-11-21 19:43:46 |
| 合計ジャッジ時間 | 16,717 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 123 |
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, 73) Warning: imported and not used: 'intsets' [UnusedImport] /home/judge/data/code/Main.nim(1, 52) Warning: imported and not used: 'tables' [UnusedImport] /home/judge/data/code/Main.nim(2, 8) Warning: imported and not used: 'critbits' [UnusedImport] /home/judge/data/code/Main.nim(1, 66) Warning: imported and not used: 'lists' [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()
es = newseqwith(n,newseq[int]())
loopE = newseqwith(n,newseq[bool]())
invE = newseqwith(n,newseq[int]())
ids = newseqwith(n,newseq[int]())
touch = newseqwith(n,false)
for i in 0..<n:
var
a = scan()-1
b = scan()-1
es[a].add(b)
loopE[a].add(false)
ids[a].add(i+1)
es[b].add(a)
loopE[b].add(false)
ids[b].add(i+1)
invE[a].add(es[b].len-1)
invE[b].add(es[a].len-1)
proc dfsFindLoop(par,p:int):int=
result = -1
if touch[p]:
return p
else:
touch[p]=true
for nIdx in 0..<es[p].len:
var
nxt = es[p][nIdx]
if nxt == par:continue
else:
var t = dfsFindLoop(p,nxt)
if t>=0:
return t
return -1
proc dfs(par:int,p:int):bool=
if touch[p]:
return true
else:
touch[p]=true
for nIdx in 0..<es[p].len:
var
nxt = es[p][nIdx]
if nxt == par:continue
else:
var t = dfs(p,nxt)
if t:
loopE[p][nIdx]=true
loopE[nxt][invE[p][nIdx]]=true
result = result or t
if es.anyIt(it.len>=3):
var
s = dfsFindLoop(-1,0)
ans = inithashset[int]()
touch.fill(false)
discard dfs(-1,s)
for p in 0..<n:
for nIdx in 0..<es[p].len:
if loopE[p][nIdx]:
ans.incl(ids[p][nIdx])
echo ans.len
echo ans.toseq.join(" ")
else:
# 全部ループ
var ans = newseq[int]()
for i in 1..n:
ans.add(i)
echo n
echo ans.join(" ")
solve()