結果
| 問題 | No.2740 Old Maid |
| ユーザー |
👑  seekworser
|
| 提出日時 | 2024-04-23 21:08:57 |
| 言語 | Nim (2.2.0) |
| 結果 |
AC
|
| 実行時間 | 866 ms / 2,000 ms |
| コード長 | 13,575 bytes |
| コンパイル時間 | 6,212 ms |
| コンパイル使用メモリ | 93,880 KB |
| 実行使用メモリ | 25,584 KB |
| 最終ジャッジ日時 | 2024-11-06 03:29:01 |
| 合計ジャッジ時間 | 29,066 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 62 |
ソースコード
import macros;macro ImportExpand(s:untyped):untyped = parseStmt($s[2])# https://github.com/tatyam-prime/SortedSet/blob/main/SortedMultiset.pywhen not declared CPLIB_COLLECTIONS_TATYAMSET:import algorithmimport mathimport sequtilsimport sugarimport optionsconst CPLIB_COLLECTIONS_TATYAMSET* = 1const BUCKET_RATIO = 8const SPLIT_RATIO = 12type SortedMultiSet*[T] = ref objectsize: intarr*: seq[seq[T]]proc initSortedMultiset*[T](v: seq[T] = @[]): SortedMultiSet[T] =#Make a new SortedMultiset from seq. / O(N) if sorted / O(N log N)var v = vif not isSorted(v):v.sort()var n = len(v)var bucket_size = int(ceil(sqrt(n/BUCKET_RATIO)))var arr = collect(newseq): (for i in 0..<bucket_size: v[(n*i div bucket_size) ..< (n*(i+1) div bucket_size)])result = SortedMultiSet[T](size: n, arr: arr)proc len*(self: SortedMultiSet): int =return self.sizeproc position[T](self: SortedMultiSet[T], x: T): (int, int) =#"return the bucket, index of the bucket and position in which x should be. self must not be empty."for i in 0..<self.arr.len:if x <= self.arr[i][^1]:return (i, self.arr[i].lowerBound(x))return (len(self.arr)-1, self.arr[^1].lowerBound(x))proc contains*[T](self: SortedMultiSet[T], x: T): bool =if self.size == 0: return falsevar (i, j) = self.position(x)return j != len(self.arr[i]) and self.arr[i][j] == xproc incl*[T](self: SortedMultiSet[T], x: T) =#"Add an element. / O(√N)"if self.size == 0:self.arr = @[@[x]]self.size = 1returnvar (b, i) = self.position(x)self.arr[b].insert(x, i)self.size += 1if len(self.arr[b]) > len(self.arr) * SPLIT_RATIO:var mid = len(self.arr[b]) shr 1self.arr.insert(self.arr[b][mid..<len(self.arr[b])], b+1)self.arr[b] = self.arr[b][0..<mid]proc innerpop[T](self: SortedMultiSet[T], b: int, i: int): T{.discardable.} =var b = bif b < 0:b = self.size + bvar ans = self.arr[b][i]self.arr[b].delete(i)self.size -= 1if len(self.arr[b]) == 0: self.arr.delete(b)return ansproc excl*[T](self: SortedMultiSet[T], x: T): bool{.discardable.} =#"Remove an element and return True if removed. / O(√N)"if self.size == 0: return falsevar (b, i) = self.position(x)if i == len(self.arr[b]) or self.arr[b][i] != x: return falseself.innerpop(b, i)return trueproc lt*[T](self: SortedMultiSet[T], x: T): Option[T] =#"Find the largest element < x, or None if it doesn't exist."for i in countdown(len(self.arr)-1, 0, 1):if self.arr[i][0] < x:return some(self.arr[i][lowerBound(self.arr[i], x) - 1])return none(T)proc le*[T](self: SortedMultiSet[T], x: T): Option[T] =#"Find the largest element <= x, or None if it doesn't exist."for i in countdown(len(self.arr)-1, 0, 1):if self.arr[i][0] <= x:return some(self.arr[i][upperBound(self.arr[i], x) - 1])return none(T)proc gt*[T](self: SortedMultiSet[T], x: T): Option[T] =#"Find the smallest element > x, or None if it doesn't exist."for i in 0..<len(self.arr):if self.arr[i][^1] > x:return some(self.arr[i][upperBound(self.arr[i], x)])return none(T)proc ge*[T](self: SortedMultiSet[T], x: T): Option[T] =#"Find the smallest element >= x, or None if it doesn't exist."for i in 0..<len(self.arr):if self.arr[i][^1] >= x:return some(self.arr[i][lowerBound(self.arr[i], x)])return none(T)proc `[]`*[T](self: SortedMultiSet[T], i: int): T =var i = i#"Return the i-th element."if i < 0:for j in countdown(len(self.arr)-1, 0, 1):i += len(self.arr[j])if i >= 0: return self.arr[j][i]else:for j in 0..<len(self.arr):if i < len(self.arr[j]): return self.arr[j][i]i -= len(self.arr[j])raise newException(IndexDefect, "index " & $i & " not in 0 .. " & $(self.size-1))proc pop*[T](self: SortedMultiSet[T], i: int = -1): T =#"Pop and return the i-th element."var i = iif i < 0:for b in countdown(len(self.arr)-1, 0, 1):i += len(self.arr[b])if i >= 0: return self.innerpop(not b, i)else:for b in 0..<len(self.arr):if i < len(self.arr[b]): return self.innerpop(b, i)i -= len(self.arr[b])raise newException(IndexDefect, "index " & $i & " not in 0 .. " & $(self.size-1))proc index*[T](self: SortedMultiSet[T], x: T): int =#"Count the number of elements < x."for i in 0..<len(self.arr):if self.arr[i][^1] >= x:return result + lowerBound(self.arr[i], x)result += len(self.arr[i])proc index_right*[T](self: SortedMultiSet[T], x: T): int =#"Count the number of elements <= x."for i in 0..<len(self.arr):if self.arr[i][^1] > x:return result + upperBound(self.arr[i], x)result += len(self.arr[i])proc count*[T](self: SortedMultiSet[T], x: T): int =#"Count the number of x."return self.index_right(x) - self.index(x)iterator items*[T](self: SortedMultiSet[T]): T =for i in 0..<len(self.arr):for j in self.arr[i]:yield jImportExpand "cplib/tmpl/citrus.nim" <=== "when not declared CPLIB_TMPL_CITRUS:\n const CPLIB_TMPL_CITRUS* = 1\n {.warning[UnusedImport]: off.}\n {.hint[XDeclaredButNotUsed]: off.}\n import os\n import algorithm\n import sequtils\n import tables\n import macros\nimport std/math\n import sets\n import strutils\n import strformat\n import sugar\n import streams\n import deques\n importbitops\n import heapqueue\n import options\n import hashes\n const MODINT998244353* = 998244353\n const MODINT1000000007* =1000000007\n #[ include cplib/utils/infl ]#\n when not declared CPLIB_UTILS_INFL:\n const CPLIB_UTILS_INFL* = 1\n constINFi32* = 100100111.int32\n const INFL* = int(3300300300300300491)\n type double* = float64\n let readNext = iterator(getsChar: bool= false): string {.closure.} =\n while true:\n var si: string\n try: si = stdin.readLine\n exceptEOFError: yield \"\"\n for s in si.split:\n if getsChar:\n for i in 0..<s.len():\nyield s[i..i]\n else:\n if s.isEmptyOrWhitespace: continue\n yield s\n proc input*(t: typedesc[string]): string = readNext()\n proc input*(t: typedesc[char]): char = readNext(true)[0]\n proc input*(t: typedesc[int]): int= readNext().parseInt\n proc input*(t: typedesc[float]): float = readNext().parseFloat\n macro input*(t: typedesc, n: varargs[int]):untyped =\n var repStr = \"\"\n for arg in n:\n repStr &= &\"({arg.repr}).newSeqWith \"\n parseExpr(&\"{repStr}input({t})\")\n macro input*(ts: varargs[auto]): untyped =\n var tupStr = \"\"\n for t in ts:\n tupStr &=&\"input({t.repr}),\"\n parseExpr(&\"({tupStr})\")\n macro input*(n: int, ts: varargs[auto]): untyped =\n for typ in ts:\nif typ.typeKind != ntyAnything:\n error(\"Expected typedesc, got \" & typ.repr, typ)\n parseExpr(&\"({n.repr}).newSeqWith input({ts.repr})\")\n proc `fmtprint`*(x: int or string or char or bool): string = return $x\n proc `fmtprint`*(x: float orfloat32 or float64): string = return &\"{x:.16f}\"\n proc `fmtprint`*[T](x: seq[T] or Deque[T] or HashSet[T] or set[T]): string = return x.toSeq.join(\" \")\n proc `fmtprint`*[T, N](x: array[T, N]): string = return x.toSeq.join(\" \")\n proc `fmtprint`*[T](x: HeapQueue[T]):string =\n var q = x\n while q.len != 0:\n result &= &\"{q.pop()}\"\n if q.len != 0: result &= \" \"\nproc `fmtprint`*[T](x: CountTable[T]): string =\n result = x.pairs.toSeq.mapIt(&\"{it[0]}: {it[1]}\").join(\" \")\n proc `fmtprint`*[K,V](x: Table[K, V]): string =\n result = x.pairs.toSeq.mapIt(&\"{it[0]}: {it[1]}\").join(\" \")\n proc print*(prop: tuple[f: File, sepc:string, endc: string, flush: bool], args: varargs[string, `fmtprint`]) =\n for i in 0..<len(args):\n prop.f.write(&\"{args[i]}\")\n if i != len(args) - 1: prop.f.write(prop.sepc) else: prop.f.write(prop.endc)\n if prop.flush: prop.f.flushFile()\n proc print*(args: varargs[string, `fmtprint`]) = print((f: stdout, sepc: \" \", endc: \"\\n\", flush: false), args)\n constLOCAL_DEBUG{.booldefine.} = false\n macro getSymbolName(x: typed): string = x.toStrLit\n macro debug*(args: varargs[untyped]): untyped =\nwhen LOCAL_DEBUG:\n result = newNimNode(nnkStmtList, args)\n template prop(e: string = \"\"): untyped = (f: stderr,sepc: \"\", endc: e, flush: true)\n for i, arg in args:\n if arg.kind == nnkStrLit:\n result.add(quote do: print(prop(), \"\\\"\", `arg`, \"\\\"\"))\n else:\n result.add(quote do: print(prop(\": \"),getSymbolName(`arg`)))\n result.add(quote do: print(prop(), `arg`))\n if i != args.len - 1: result.add(quote do: print(prop(), \", \"))\n else: result.add(quote do: print(prop(), \"\\n\"))\n else:\n return (quote do:discard)\n proc `%`*(x: SomeInteger, y: SomeInteger): int =\n result = x mod y\n if y > 0 and result < 0: result += y\nif y < 0 and result > 0: result += y\n proc `//`*(x: SomeInteger, y: SomeInteger): int =\n result = x div y\n if y > 0 andresult * y > x: result -= 1\n if y < 0 and result * y < x: result -= 1\n proc `^`*(x: SomeInteger, y: SomeInteger): int = x xor y\nproc `&`*(x: SomeInteger, y: SomeInteger): int = x and y\n proc `|`*(x: SomeInteger, y: SomeInteger): int = x or y\n proc `>>`*(x:SomeInteger, y: SomeInteger): int = x shr y\n proc `<<`*(x: SomeInteger, y: SomeInteger): int = x shl y\n proc `%=`*(x: var SomeInteger, y:SomeInteger): void = x = x % y\n proc `//=`*(x: var SomeInteger, y: SomeInteger): void = x = x // y\n proc `^=`*(x: var SomeInteger, y:SomeInteger): void = x = x ^ y\n proc `&=`*(x: var SomeInteger, y: SomeInteger): void = x = x & y\n proc `|=`*(x: var SomeInteger, y:SomeInteger): void = x = x | y\n proc `>>=`*(x: var SomeInteger, y: SomeInteger): void = x = x >> y\n proc `<<=`*(x: var SomeInteger, y:SomeInteger): void = x = x << y\n proc `[]`*(x, n: int): bool = (x and (1 shl n)) != 0\n proc `[]=`*(x: var int, n: int, i: bool) =\nif i: x = x or (1 << n)\n else: (if x[n]: x = x xor (1 << n))\n proc pow*(a, n: int, m = INFL): int =\n var\n rev =1\n a = a\n n = n\n while n > 0:\n if n % 2 != 0: rev = (rev * a) mod m\n if n > 1: a = (a * a) mod m\n n >>= 1\n return rev\n #[ include cplib/math/isqrt ]#\n when not declared CPLIB_MATH_ISQRT:\n constCPLIB_MATH_ISQRT* = 1\n proc isqrt*(n: int): int =\n var x = n\n var y = (x + 1) shr 1\n while y < x:\nx = y\n y = (x + n div x) shr 1\n return x\n proc chmax*[T](x: var T, y: T): bool {.discardable.} =(if x < y: (x = y; return true; ) return false)\n proc chmin*[T](x: var T, y: T): bool {.discardable.} = (if x > y: (x = y; return true; )return false)\n proc `max=`*[T](x: var T, y: T) = x = max(x, y)\n proc `min=`*[T](x: var T, y: T) = x = min(x, y)\n proc at*(x: char, a= '0'): int = int(x) - int(a)\n proc Yes*(b: bool = true): void = print(if b: \"Yes\" else: \"No\")\n proc No*(b: bool = true): void = Yes(not b)\n proc YES_upper*(b: bool = true): void = print(if b: \"YES\" else: \"NO\")\n proc NO_upper*(b: bool = true): void = Yes_upper(notb)\n const DXY* = [(0, -1), (0, 1), (-1, 0), (1, 0)]\n const DDXY* = [(1, -1), (1, 0), (1, 1), (0, -1), (0, 1), (-1, -1), (-1, 0), (-1, 1)]\n macro exit*(statement: untyped): untyped = (quote do: (`statement`; quit()))\n proc initHashSet[T](): Hashset[T] = initHashSet[T](0)\n"var n = input(int)var p = input(int, n).mapit(it-1)var pi = newSeq[int](n)for i in 0..<n: pi[p[i]] = ivar st, rem = initSortedMultiSet[int]()for i in 0..<n:st.incl(i * 1000000 + p[i])rem.incl(i)var ans = newSeq[int]()for i in 0..<n//2:var x, y: intfor xi in rem:x = xivar idx = st.index(pi[x] * 1000000 + x)if idx == st.len - 1: continuevar y = (st[idx + 1]) % 1000000ans.add(@[x, y])rem.excl(x)rem.excl(y)st.excl(pi[x] * 1000000 + x)st.excl(pi[y] * 1000000 + y)breakprint(ans.mapit(it+1))