結果
| 問題 |
No.1424 Ultrapalindrome
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-06-02 21:39:37 |
| 言語 | Nim (2.2.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 1,450 bytes |
| コンパイル時間 | 5,455 ms |
| コンパイル使用メモリ | 87,552 KB |
| 実行使用メモリ | 12,800 KB |
| 最終ジャッジ日時 | 2024-11-15 17:22:04 |
| 合計ジャッジ時間 | 7,802 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 28 RE * 1 |
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(2, 8) Warning: imported and not used: 'critbits' [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]
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]())
mv = -1
for i in 0..<n-1:
var
a = scan()-1
b = scan()-1
es[a].add(b)
es[b].add(a)
if es[a].len>=3:
mv = a
#echo es.join("\n")
proc dfs(par,p:int):int=
if es[p].len==1:
return 1
else:
for nxt in es[p]:
if par == nxt:continue
return 1+dfs(p,nxt)
# 葉が2枚しかない場合は可能
if es.filterIt(it.len==1).len==2:
echo "Yes"
# 枝分かれしている頂点が一つしかない
# 一つしかないならmvがそれに該当する
elif es.filterIt(it.len>2).len==1:
#echo "mv:", mv
var t = initHashSet[int]()
for nxt in es[mv]:
#echo mv,",",nxt,",", dfs(mv,nxt)
t.incl(dfs(mv,nxt))
if t.len==1:
echo "Yes"
else:
echo "No"
elif n == 1:
echo "Yes"
else:
echo "No"
solve()