結果
問題 | No.20 砂漠のオアシス |
ユーザー | むらため |
提出日時 | 2019-01-28 07:55:37 |
言語 | Nim (2.0.2) |
結果 |
WA
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 3,569 bytes |
コンパイル時間 | 3,164 ms |
コンパイル使用メモリ | 67,200 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-07-01 11:05:12 |
合計ジャッジ時間 | 4,028 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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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 | WA | - |
testcase_01 | WA | - |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 3 ms
6,944 KB |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | AC | 5 ms
6,940 KB |
testcase_07 | WA | - |
testcase_08 | AC | 10 ms
6,940 KB |
testcase_09 | AC | 29 ms
6,944 KB |
testcase_10 | AC | 1 ms
6,944 KB |
testcase_11 | WA | - |
testcase_12 | AC | 3 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 6 ms
6,940 KB |
testcase_18 | WA | - |
testcase_19 | AC | 8 ms
6,940 KB |
testcase_20 | WA | - |
コンパイルメッセージ
/home/judge/data/code/Main.nim(1, 17) Warning: imported and not used: 'strutils' [UnusedImport]
ソースコード
import sequtils,strutils,algorithm proc getchar_unlocked():char {. importc:"getchar_unlocked",header: "<stdio.h>" .} proc scan(): int = while true: let k = getchar_unlocked() if k < '0': break result = 10 * result + k.ord - '0'.ord template times*(n:int,body) = (for _ in 0..<n: body) template `max=`*(x,y)= (x = max(x,y)) template `min=`*(x,y)= (x = min(x,y)) const dxdy4 :seq[tuple[x,y:int]] = @[(0,1),(1,0),(0,-1),(-1,0)] template useBinaryHeap() = type BinaryHeap*[T] = object nodes: seq[T] compare: proc(x,y:T):int popchunk: bool proc newBinaryHeap*[T](compare:proc(x,y:T):int): BinaryHeap[T] = BinaryHeap[T](nodes:newSeq[T](),compare:compare,popchunk:false) proc compareNode[T](h:BinaryHeap[T],i,j:int):int = h.compare(h.nodes[i],h.nodes[j]) proc size*[T](h:BinaryHeap[T]):int = h.nodes.len() - h.popchunk.int proc items*[T](h:var BinaryHeap[T]):seq[T] = if h.popchunk : discard h.popimpl() return h.nodes proc top*[T](h:var BinaryHeap[T]): T = if h.popchunk : discard h.popimpl() return h.nodes[0] proc push*[T](h:var BinaryHeap[T],node:T):void = if h.popchunk : h.nodes[0] = node h.shiftdown() else: h.pushimpl(node) proc pop*[T](h:var BinaryHeap[T]):T = if h.popchunk: discard h.popimpl() h.popchunk = true return h.nodes[0] proc shiftdown[T](h:var BinaryHeap[T]): void = h.popchunk = false let size = h.nodes.len() var i = 0 while true : let L = i * 2 + 1 let R = i * 2 + 2 if L >= size : break let child = if R < size and h.compareNode(R,L) <= 0 : R else: L if h.compareNode(i,child) <= 0: break swap(h.nodes[i],h.nodes[child]) i = child proc pushimpl[T](h:var BinaryHeap[T],node:T):void = h.nodes.add(node) #末尾に追加 var i = h.nodes.len() - 1 while i > 0: # 末尾から木を整形 let parent = (i - 1) div 2 if h.compare(h.nodes[parent],node) <= 0: break h.nodes[i] = h.nodes[parent] i = parent h.nodes[i] = node proc popimpl[T](h:var BinaryHeap[T]):T = result = h.nodes[0] # rootと末尾を入れ替えて木を整形 h.nodes[0] = h.nodes[^1] h.nodes.setLen(h.nodes.len() - 1) h.shiftdown() useBinaryHeap() # 0以下で死亡 / V - Lxy => Oasis(v *= 2,once) # N <= 200, V <= 500, Lxy <= 9 # x:N * y:N * use:2 => V # 最短でゴール or 最短でオアシス +最短でゴールのみ let n = scan() let v = scan() let ox = scan() - 1 let oy = scan() - 1 var L = newSeqWith(n,newSeqUninitialized[int](n)) for y in 0..<n: for x in 0..<n: L[x][y] = scan() type Field = ref object x,y,v:int proc newField(x,y,v:int):Field= new(result) result.x = x result.y = y result.v = v proc twoFactorDijkestra(sx,sy,sv:int,checkOasis:bool = true):void = var closed = newSeqWith(n,newSeq[bool](n)) var opens = newBinaryHeap[Field](proc (x,y:Field) : int = - x.v + y.v) opens.push(newField(sx,sy,sv)) while opens.size > 0: let field = opens.pop() let x = field.x let y = field.y let v = field.v if closed[x][y] : continue closed[x][y] = true if checkOasis and x == ox and y == oy: twoFactorDijkestra(x,y,v * 2,false) continue for d in dxdy4: let (nx,ny) = (d.x + x,d.y + y) if nx < 0 or ny < 0 or nx >= n or ny >= n : continue var n_v = v - L[nx][ny] if n_v <= 0 : continue if not closed[nx][ny]: opens.push(newField(nx,ny,n_v)) if nx == n-1 and ny == n-1: quit "YES",0 twoFactorDijkestra(0,0,v) echo "NO"