結果
問題 | No.120 傾向と対策:門松列(その1) |
ユーザー | むらため |
提出日時 | 2019-10-12 16:07:36 |
言語 | Nim (2.0.2) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,118 bytes |
コンパイル時間 | 6,704 ms |
コンパイル使用メモリ | 90,744 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-05-06 00:36:20 |
合計ジャッジ時間 | 7,417 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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 | WA | - |
testcase_03 | WA | - |
ソースコード
{.checks:off,optimization:speed.} import algorithm type PriorityQueue*[T] = ref object data*: seq[T] cmp*:proc(x,y:T):int proc ascending*[T](x,y:T):int = (x - y).int # 最小値 proc descending*[T](x,y:T):int = (y - x).int # 最大値 proc `[]`[T](heap: PriorityQueue[T], i: Natural): T {.inline.}= heap.data[i] proc siftdown[T](heap: var PriorityQueue[T], startpos, p: int) = var pos = p var newitem = heap[pos] while pos > startpos: let parentpos = (pos - 1) shr 1 let parent = heap[parentpos] if 0 <= heap.cmp(newitem, parent): break heap.data[pos] = parent pos = parentpos heap.data[pos] = newitem proc siftup[T](heap: var PriorityQueue[T], p: int) = let endpos = len(heap) var pos = p let startpos = pos let newitem = heap[pos] var childpos = 2 * pos + 1 while childpos < endpos: let rightpos = childpos + 1 if rightpos < endpos and 0 <= heap.cmp(heap[childpos], heap[rightpos]): childpos = rightpos heap.data[pos] = heap[childpos] pos = childpos childpos = 2 * pos + 1 heap.data[pos] = newitem siftdown(heap, startpos, pos) proc len*[T](heap: PriorityQueue[T]): int = heap.data.len proc push*[T](heap: var PriorityQueue[T], item: T) = heap.data.add(item) siftdown(heap, 0, len(heap)-1) proc pop*[T](heap: var PriorityQueue[T]): T {.discardable.} = let lastelt = heap.data.pop() if heap.len > 0: result = heap[0] heap.data[0] = lastelt siftup(heap, 0) else: result = lastelt proc top*[T](heap: PriorityQueue[T]): T = heap.data[0] proc poppush*[T](heap: var PriorityQueue[T], item: T): T = result = heap[0] heap.data[0] = item siftup(heap, 0) proc pushpop*[T](heap: var PriorityQueue[T], item: T): T = if heap.len > 0 and 0 > heap.cmp(heap[0], item): swap(item, heap[0]) siftup(heap, 0) return item proc clear*[T](heap: var PriorityQueue[T]) = heap.data.setLen(0) proc toSequence*[T](heap: PriorityQueue[T]): seq[T] = heap.data.sorted(cmp) proc `$`*[T](heap: PriorityQueue[T]): string = $heap.toSequence() iterator items*[T](heap:PriorityQueue[T]) : T = for v in heap.toSequence(): yield v proc newPriorityQueue*[T](cmp:proc(x,y:T):int) : PriorityQueue[T] = new(result) result.data = @[] result.cmp = cmp when isMainModule: import unittest test "Priority Queue": block: # 最小値 var pq = newPriorityQueue[int](ascending) pq.push(30) pq.push(10) pq.push(20) check: pq.pop() == 10 check: pq.top() == 20 check: pq.pop() == 20 pq.push(0) check: pq.pop() == 0 check: pq.pop() == 30 var pq2 = newPriorityQueue[int](proc(x,y:int):int = x - y) pq2.push(30) pq2.push(10) pq2.push(20) check: pq2.pop() == 10 check: pq2.top() == 20 check: pq2.pop() == 20 pq2.push(0) check: pq2.pop() == 0 check: pq2.pop() == 30 block: # 最大値 var pq = newPriorityQueue[int](descending) pq.push(30) pq.push(10) pq.push(20) check: pq.pop() == 30 check: pq.pop() == 20 pq.push(0) check: pq.pop() == 10 check: pq.pop() == 0