import algorithm, deques, heapqueue, math, sets, sequtils, strutils, sugar, tables proc input*(): string = return stdin.readLine proc chmax*[T: SomeNumber](num0: var T, num1: T) = num0 = max(num0, num1) proc chmin*[T: SomeNumber](num0: var T, num1: T) = num0 = min(num0, num1) proc bit_length(n: Natural): Natural = if n == 0: return 0 let s = toBin(n, 60) return 60 - s.find('1') type DuelSegmentTree*[T] = ref object LV: Natural N0: Positive lazy_ide_ele: T lazy_data: seq[T] proc initDuelSegmentTree*[T](size: Positive, lazy_ide_ele: T): DuelSegmentTree[T] = var LV = bit_length(size - 1) N0 = 1 shl LV return DuelSegmentTree[T](LV: LV, N0: N0, lazy_ide_ele: lazy_ide_ele, lazy_data: newSeqWith(2 * N0, lazy_ide_ele)) iterator gindex*[T](self: var DuelSegmentTree[T], left, right: Natural): Natural = var L = (left + self.N0) shr 1 R = (right + self.N0) shr 1 lc = if (left and 1) == 1: 0 else: bit_length(L and -L) rc = if (right and 1) == 1: 0 else: bit_length(R and -R) for i in 0..