import macros;macro ImportExpand(s:untyped):untyped = parseStmt($s[2]) # {.checks: off.} ImportExpand "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\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 const INF* = 100100111\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 except EOFError: yield \"\"\n for s in si.split:\n if getsChar:\n for i in 0.. 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 = 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 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 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 converter tofloat*(n: int): float = float(n)\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" ImportExpand "cplib/collections/segtree.nim" <=== "when not declared CPLIB_COLLECTIONS_SEGTREE:\n const CPLIB_COLLECTIONS_SEGTREE* = 1\n import algorithm\n type SegmentTree*[T] = ref object\n default: T\n merge: proc(x: T, y: T): T\n arr*: seq[T]\n lastnode: int\n length: int\n proc initSegmentTree*[T](v: seq[T], merge: proc(x: T, y: T): T, default: T): SegmentTree[T] =\n ## セグメントツリーを生成します。\n ## vに元となるリスト、mergeに二つの区間をマージする関数、デフォルトに単位元を与えてください。\n var lastnode = 1\n while lastnode < len(v):\n lastnode*=2\n var arr = newSeq[T](2*lastnode)\n arr.fill(default)\n var self = SegmentTree[T](default: default, merge: merge, arr: arr, lastnode: lastnode, length: len(v))\n #1-indexedで作成する\n for i in 0.. 1:\n x = x shr 1\n self.arr[x] = self.merge(self.arr[2*x], self.arr[2*x+1])\n proc get*[T](self: SegmentTree[T], q_left: Natural, q_right: Natural): T =\n ## 半解区間[q_left,q_right)についての演算結果を返します。\n assert q_left <= q_right and 0 <= q_left and q_right <= self.length\n var q_left = q_left\n var q_right = q_right\n q_left += self.lastnode\n q_right += self.lastnode\n var (lres, rres) = (self.default, self.default)\n while q_left < q_right:\n if (q_left and 1) > 0:\n lres = self.merge(lres, self.arr[q_left])\n q_left += 1\n if (q_right and 1) > 0:\n q_right -= 1\n rres = self.merge(self.arr[q_right], rres)\n q_left = q_left shr 1\n q_right = q_right shr 1\n return self.merge(lres, rres)\n proc get*[T](self: SegmentTree[T], segment: HSlice[int, int]): T =\n assert segment.a <= segment.b + 1 and 0 <= segment.a and segment.b+1 <= self.length\n return self.get(segment.a, segment.b+1)\n proc `[]`*[T](self: SegmentTree[T], index: Natural): T =\n assert index < self.length\n return self.arr[index+self.lastnode]\n proc `[]=`*[T](self: SegmentTree[T], index: Natural, val: T) =\n assert index < self.length\n self.update(index, val)\n proc get_all*[T](self: SegmentTree[T]): T =\n ## [0,len(self))区間の演算結果をO(1)で返す\n return self.arr[1]\n proc len*[T](self: SegmentTree[T]): int =\n return self.length\n\n template newSegWith*(V, merge, default: untyped): untyped =\n initSegmentTree(V, (l, r{.inject.}: typeof(default)) => merge, default)\n\n" ImportExpand "cplib/collections/unionfind.nim" <=== "when not declared CPLIB_COLLECTIONS_UNIONFIND:\n const CPLIB_COLLECTIONS_UNIONFIND* = 1\n import algorithm\n import sequtils\n type UnionFind = ref object\n count*: int\n par_or_siz: seq[int]\n proc initUnionFind*(N: int): UnionFind =\n result = UnionFind(count: N, par_or_siz: newSeqwith(N, -1))\n proc root*(self: UnionFind, x: int): int =\n if self.par_or_siz[x] < 0:\n return x\n else:\n self.par_or_siz[x] = self.root(self.par_or_siz[x])\n return self.par_or_siz[x]\n proc issame*(self: UnionFind, x: int, y: int): bool =\n return self.root(x) == self.root(y)\n proc unite*(self: UnionFind, x: int, y: int) =\n var x = self.root(x)\n var y = self.root(y)\n if(x != y):\n if(self.par_or_siz[x] > self.par_or_siz[y]):\n swap(x, y)\n self.par_or_siz[x] += self.par_or_siz[y]\n self.par_or_siz[y] = x\n self.count -= 1\n proc siz*(self: UnionFind, x: int): int =\n var x = self.root(x)\n return -self.par_or_siz[x]\n" # https://atcoder.jp/contests/abc337/submissions/50216964 # ↑上記の提出より引用 type HeavyLightDecomposition = ref object N: int P: seq[int] PP: seq[int] PD: seq[int] D: seq[int] I: seq[int] rangeL: seq[int] rangeR: seq[int] proc initHld(hld: HeavyLightDecomposition, adj: seq[seq[int]], root: int) = var n: int = len(adj) hld.N = n hld.P = newSeqWith(n, -1) hld.I = newSeqWith(n, 0) hld.I[0] = root var iI: int = 1 for i in 0.. hld.PD[v]: u = hld.P[hld.PP[u]] while hld.PP[u] != hld.PP[v]: u = hld.P[hld.PP[u]] v = hld.P[hld.PP[v]] if hld.D[u] > hld.D[v]: return v u proc dist(hld: HeavyLightDecomposition, u: int, v: int): int = hld.depth(u) + hld.depth(v) - hld.depth(hld.lca(u, v)) * 2 proc path(hld: HeavyLightDecomposition, r: int, c: int, include_root: bool, reverse_path: bool): seq[(int, int)] = var (r, c) = (r, c) var k = hld.PD[c] - hld.PD[r] + 1 if k <= 0: return @[] var res = newSeqWith(k, (0, 0)) for i in 0.. hld.D[c]: return @[] var root_off: int = 0 if include_root: root_off = 1 res[^1] = (hld.rangeL[r]+root_off, hld.rangeL[c]+1) if res[^1][0] == res[^1][1]: discard res.pop() k -= 1 if reverse_path: for i in 0..= 0: ans.max= p print(ans)