結果
| 問題 | No.2887 Minahoshi (Easy) |
| ユーザー |
👑  seekworser
|
| 提出日時 | 2024-07-09 10:49:40 |
| 言語 | Nim (2.0.2) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 13,840 bytes |
| コンパイル時間 | 5,180 ms |
| コンパイル使用メモリ | 94,268 KB |
| 実行使用メモリ | 13,760 KB |
| 最終ジャッジ日時 | 2024-07-09 10:49:52 |
| 合計ジャッジ時間 | 10,432 ms |
|
ジャッジサーバーID （参考情報） |
judge2 / judge5 |
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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 | AC | 2 ms
13,760 KB |
| testcase_01 | AC | 2 ms
6,816 KB |
| testcase_02 | TLE | - |
| testcase_03 | -- | - |
| testcase_04 | -- | - |
| testcase_05 | -- | - |
| testcase_06 | -- | - |
| testcase_07 | -- | - |
| testcase_08 | -- | - |
| testcase_09 | -- | - |
| testcase_10 | -- | - |
| testcase_11 | -- | - |
| testcase_12 | -- | - |
| testcase_13 | -- | - |
| testcase_14 | -- | - |
| testcase_15 | -- | - |
| testcase_16 | -- | - |
| testcase_17 | -- | - |
| testcase_18 | -- | - |
| testcase_19 | -- | - |
| testcase_20 | -- | - |
| testcase_21 | -- | - |
| testcase_22 | -- | - |
| testcase_23 | -- | - |
| testcase_24 | -- | - |
| testcase_25 | -- | - |
| testcase_26 | -- | - |
| testcase_27 | -- | - |
ソースコード
import macros;macro ImportExpand(s:untyped):untyped = parseStmt($s[2])
# source: https://github.com/kemuniku/cplib/tree/main/src/cplib/tmpl/citrus.nim
ImportExpand "cplib/tmpl/citrus" <=== "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\n import std/math\n import sets\n import strutils\n import strformat\n import sugar\n import streams\n import deques\n import bitops\n import heapqueue\n import options\n import hashes\n const MODINT998244353* = 998244353\n const MODINT1000000007* = 1000000007\n when not declared CPLIB_UTILS_CONSTANTS:\n const CPLIB_UTILS_CONSTANTS* = 1\n const INF32*: int32 = 100100111.int32\n const INF64*: int = int(3300300300300300491)\n \n const INFL = INF64\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 except EOFError: yield \"\"\n for s in si.split:\n if getsChar:\n for i in 0..<s.len():\n yield 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:\n if 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 or float32 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 &= \" \"\n proc `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 const LOCAL_DEBUG{.booldefine.} = false\n macro getSymbolName(x: typed): string = x.toStrLit\n macro debug*(args: varargs[untyped]): untyped =\n when 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\n if y < 0 and result > 0: result += y\n proc `//`*(x: SomeInteger, y: SomeInteger): int =\n result = x div y\n if y > 0 and result * y > x: result -= 1\n if y < 0 and result * y < x: result -= 1\n proc `^`*(x: SomeInteger, y: SomeInteger): int = x xor y\n proc `&`*(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) =\n if i: x = x or (1 << n)\n else: (if x[n]: x = x xor (1 << n))\n proc pow*(a, n: int, m = INF64): 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 when not declared CPLIB_MATH_ISQRT:\n const CPLIB_MATH_ISQRT* = 1\n proc isqrt*(n: int): int =\n var x = n\n var y = (x + 1) shr 1\n while y < x:\n x = y\n y = (x + n div x) shr 1\n return x\n \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(not b)\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"
# source: https://github.com/zer0-star/Nim-ACL/tree/master/src/atcoder/string.nim
ImportExpand "atcoder/string" <=== "when not declared ATCODER_STRING_HPP:\n const ATCODER_STRING_HPP* = 1\n\n import std/algorithm\n import std/sequtils\n\n proc sa_naive*(s:seq[int]):seq[int] =\n let n = s.len\n var sa = newSeq[int](n)\n for i in 0..<n:sa[i] = i\n sa.sort() do (l, r:int) -> int:\n if l == r: return 0\n var (l, r) = (l, r)\n while l < n and r < n:\n if s[l] != s[r]: return cmp[int](s[l], s[r])\n l.inc;r.inc\n return cmp[int](n, l)\n return sa\n \n proc sa_doubling*(s:seq[int]):seq[int] =\n let n = s.len\n var\n sa, tmp = newSeq[int](n)\n rnk = s\n for i in 0..<n:sa[i] = i\n var k = 1\n while k < n:\n proc cmp0(x, y:int):int =\n if rnk[x] != rnk[y]: return cmp[int](rnk[x], rnk[y])\n let\n rx = if x + k < n: rnk[x + k] else: -1\n ry = if y + k < n: rnk[y + k] else: -1\n return cmp[int](rx, ry)\n sa.sort(cmp0)\n tmp[sa[0]] = 0\n for i in 1..<n:\n tmp[sa[i]] = tmp[sa[i - 1]] + (if cmp0(sa[i - 1], sa[i]) < 0: 1 else: 0)\n swap(tmp, rnk)\n k = k shl 1\n return sa\n\n # SA-IS, linear-time suffix array construction\n # Reference:\n # G. Nong, S. Zhang, and W. H. Chan,\n # Two Efficient Algorithms for Linear Time Suffix Array Construction\n# template <int THRESHOLD_NAIVE = 10, int THRESHOLD_DOUBLING = 40>\n proc sa_is*(s:seq[int], upper:int, THRESHOLD_NAIVE:static[int] = 10, THRESHOLD_DOUBLING:static[int] = 40):seq[int] =\n let n = s.len\n if n == 0: return @[]\n if n == 1: return @[0]\n if n == 2:\n if s[0] < s[1]:\n return @[0, 1]\n else:\n return @[1, 0]\n if n < THRESHOLD_NAIVE:\n return sa_naive(s)\n if n < THRESHOLD_DOUBLING:\n return sa_doubling(s)\n \n var sa, ls = newSeq[int](n)\n for i in countdown(n - 2, 0):\n ls[i] = if s[i] == s[i + 1]: ls[i + 1] else: (s[i] < s[i + 1]).int\n var sum_l, sum_s = newSeq[int](upper + 1)\n for i in 0..<n:\n if ls[i] == 0:\n sum_s[s[i]].inc\n else:\n sum_l[s[i] + 1].inc\n for i in 0..upper:\n sum_s[i] += sum_l[i]\n if i < upper: sum_l[i + 1] += sum_s[i]\n\n proc induce(lms:seq[int]):auto =\n sa.fill(-1)\n var buf = sum_s\n for d in lms:\n if d == n: continue\n sa[buf[s[d]]] = d\n buf[s[d]].inc\n buf = sum_l\n sa[buf[s[n - 1]]] = n - 1\n buf[s[n - 1]].inc\n for i in 0..<n:\n let v = sa[i]\n if v >= 1 and ls[v - 1] == 0:\n sa[buf[s[v - 1]]] = v - 1\n buf[s[v - 1]].inc\n buf = sum_l\n for i in countdown(n - 1, 0):\n let v = sa[i]\n if v >= 1 and ls[v - 1] != 0:\n buf[s[v - 1] + 1].dec\n sa[buf[s[v - 1] + 1]] = v - 1\n \n var lms_map = newSeqWith(n + 1, -1)\n var m = 0\n for i in 1..<n:\n if ls[i - 1] == 0 and ls[i] != 0:\n lms_map[i] = m\n m.inc\n var lms = newSeqOfCap[int](m)\n for i in 1..<n:\n if ls[i - 1] == 0 and ls[i] != 0:\n lms.add(i)\n \n induce(lms)\n \n if m != 0:\n var sorted_lms = newSeqOfCap[int](m)\n for v in sa:\n if lms_map[v] != -1: sorted_lms.add(v)\n var\n rec_s = newSeq[int](m)\n rec_upper = 0;\n rec_s[lms_map[sorted_lms[0]]] = 0\n for i in 1..<m:\n var (l, r) = (sorted_lms[i - 1], sorted_lms[i])\n let\n end_l = if lms_map[l] + 1 < m: lms[lms_map[l] + 1] else: n\n end_r = if lms_map[r] + 1 < m: lms[lms_map[r] + 1] else: n\n var same = true\n if end_l - l != end_r - r:\n same = false\n else:\n while l < end_l:\n if s[l] != s[r]:\n break\n l.inc\n r.inc\n if l == n or s[l] != s[r]: same = false\n if not same: rec_upper.inc\n rec_s[lms_map[sorted_lms[i]]] = rec_upper\n\n let rec_sa =\n sa_is[THRESHOLD_NAIVE, THRESHOLD_DOUBLING](rec_s, rec_upper)\n\n for i in 0..<m:\n sorted_lms[i] = lms[rec_sa[i]]\n induce(sorted_lms)\n return sa\n\n# namespace internal\n \n proc suffix_array*(s:seq[int], upper:int):seq[int] =\n assert 0 <= upper\n for d in s:\n assert 0 <= d and d <= upper\n return sa_is(s, upper)\n \n proc suffix_array*[T](s:seq[T]):seq[int] =\n let n = s.len\n var idx = newSeq[int](n)\n for i in 0..<n: idx[i] = i\n idx.sort(proc(l,r:int):int = cmp[int](s[l], s[r]))\n var s2 = newSeq[int](n)\n var now = 0\n for i in 0..<n:\n if i != 0 and s[idx[i - 1]] != s[idx[i]]: now.inc\n s2[idx[i]] = now\n return sa_is(s2, now)\n \n proc suffix_array*(s:string):seq[int] =\n return sa_is(s.mapIt(it.int), 255);\n \n # Reference:\n # T. Kasai, G. Lee, H. Arimura, S. Arikawa, and K. Park,\n # Linear-Time Longest-Common-Prefix Computation in Suffix Arrays and Its\n # Applications\n proc lcp_array*[T](s:seq[T], sa:seq[int]):seq[int] =\n let n = s.len\n assert n >= 1\n var rnk = newSeq[int](n)\n for i in 0..<n:\n rnk[sa[i]] = i\n var lcp = newSeq[int](n - 1)\n var h = 0;\n for i in 0..<n:\n if h > 0: h.dec\n if rnk[i] == 0: continue\n let j = sa[rnk[i] - 1]\n while j + h < n and i + h < n:\n if s[j + h] != s[i + h]: break\n h.inc\n lcp[rnk[i] - 1] = h\n return lcp\n \n proc lcp_array*(s:string, sa:seq[int]):seq[int] = lcp_array(s.mapIt(it.int), sa)\n \n # Reference:\n # D. Gusfield,\n # Algorithms on Strings, Trees, and Sequences: Computer Science and\n # Computational Biology\n proc z_algorithm*[T](s:seq[T]):seq[T] =\n let n = s.len\n if n == 0: return @[]\n var z = newSeq[int](n)\n z[0] = 0\n var j = 0\n for i in 1..<n:\n var k = z[i].addr\n k[] = if j + z[j] <= i: 0 else: min(j + z[j] - i, z[i - j])\n while i + k[] < n and s[k[]] == s[i + k[]]: k[].inc\n if j + z[j] < i + z[i]: j = i\n z[0] = n\n return z\n\n proc z_algorithm*(s:string):auto = z_algorithm(s.mapIt(it.int))\n\n# namespace atcoder\n\n"
# {.checks: off.}
type str = string
proc solve() =
var n = input(int)
var ans = ""
var cur = -INFL
for bit in 0..<(1 << n):
var s = ""
for i in 0..<n:
if bit[i]: s &= "a"
else: s &= "b"
var sa = s.suffix_array
var lcp = s.lcp_array(sa)
if chmax(cur, lcp.sum):
ans = s
print(ans)
solve()