import sequtils # import algorithm,math,tables # import times,macros,queues,bitops,strutils,intsets,sets # import rationals,critbits,ropes,nre,pegs,complex,stats,heapqueue,sugar template times*(n:int,body) = (for _ in 0.." ,discardable.} proc scan(): int = while true: let k = getchar_unlocked() if k < '0': return result = 10 * result + k.ord - '0'.ord import sequtils,math type SegmentTree[T] = ref object data:seq[T] n : int rawSize:int infinity: T cmp:proc(x,y:T):T SegmentTreeType = enum SaveMin , SaveMax proc newSegmentTree[T](size:int,segType:SegmentTreeType) : SegmentTree[T] = new(result) if segType == SaveMin: # 最小値 proc minimpl[T](x,y:T): T = (if x <= y: x else: y) result.infinity = 1e12.T result.cmp = minimpl elif segType == SaveMax: # 最大値 proc maximpl[T](x,y:T): T = (if x >= y: x else: y) result.infinity = -1e12.T result.cmp = maximpl else: doAssert false result.n = size.nextPowerOfTwo() result.rawSize = size result.data = newSeqWith(result.n * 2,result.infinity) proc `[]=`[T](self:var SegmentTree[T],i:int,val:T) = var i = i + self.n - 1 self.data[i] = val while i > 0: i = (i - 1) shr 1 self.data[i] = self.cmp(self.data[i * 2 + 1],self.data[i * 2 + 2]) proc queryImpl[T](self:SegmentTree[T],a,b,k,l,r:int) : T = if r <= a or b <= l : return self.infinity if a <= l and r <= b : return self.data[k] let vl = self.queryImpl(a,b,k*2+1,l,(l+r) shr 1) let vr = self.queryImpl(a,b,k*2+2,(l+r) shr 1,r) return self.cmp(vl,vr) proc `[]`[T](self:SegmentTree[T],slice:Slice[int]): T = return self.queryImpl(slice.a,slice.b+1,0,0,self.n) proc `[]`[T](self:SegmentTree[T],i:int): T = self[i..i] proc findIndexImpl[T](self:SegmentTree[T],a,b,k,l,r:int) : int = if r <= a or b <= l : return -1 if a <= l and r <= b : return k let vl = self.findIndexImpl(a,b,k*2+1,l,(l+r) shr 1) let vr = self.findIndexImpl(a,b,k*2+2,(l+r) shr 1,r) if vl == -1: return vr if vr == -1: return vl return self.cmp(self.data[vl],self.data[vr]) proc findIndex[T](self:SegmentTree[T],slice:Slice[int]): int = var index = self.findIndexImpl(slice.a,slice.b+1,0,0,self.n) while index < self.n - 1: let l = index * 2 + 1 if self.data[l] == self.data[index] : index = l else: index = l + 1 return index - (self.n - 1) proc `$`[T](self:SegmentTree[T]): string = var arrs : seq[seq[int]] = @[] var l = 0 var r = 1 while r <= self.data.len: arrs.add self.data[l..