import algorithm, complex, macros, math, sequtils, sets, strutils, tables import sugar macro unpack*(rhs: seq, cnt: static[int]): auto = let v = genSym(); result = quote do:(let `v` = `rhs`;()) if NimMajor == 0 and NimMinor <= 17: for i in 0 ..< cnt: result[0][1].add(quote do:`v`[`i`]) else: for i in 0 ..< cnt: result[1].add(quote do:`v`[`i`]) template input*(T: typedesc, cnt: Natural = 1): untyped = let line = stdin.readLine.split(" ") when T is int: line.map(parseInt).unpack(cnt) elif T is float: line.map(parseFloat).unpack(cnt) elif T is string: line.unpack(cnt) elif T is char: line.mapIt(it[0]).unpack(cnt) elif T is seq[int]: line.map(parseint) elif T is seq[float]: line.map(parseFloat) elif T is seq[string]: line elif T is seq[char]: line.mapIt(it[0]) proc `|=`*(n: var int, m: int) = n = n or m proc `|=`*(n: var bool, m: bool) = n = n or m proc `&=`*(n: var int, m: int) = n = n and m proc `&=`*(n: var bool, m: bool) = n = n and m proc `^=`*(n: var int, m: int) = n = n xor m proc `^=`*(n: var bool, m: bool) = n = n xor m proc `%=`*(n: var int, m: int) = n = n mod m proc `/=`*(n: var int, m: int) = n = n div m proc `<<=`*(n: var int, m: int) = n = n shl m proc `>>=`*(n: var int, m: int) = n = n shr m proc `?=`*(n: var SomeNumber, m: SomeNumber) = n = max(n, m) proc newSeq2*[T](n1, n2: Natural): seq[seq[T]] = newSeqWith(n1, newSeq[T](n2)) proc newSeq3*[T](n1, n2, n3: Natural): seq[seq[seq[T]]] = newSeqWith(n1, newSeqWith(n2, newSeq[T](n3))) # -------------------------------------------------- # type MergeOperator[T] = proc(a: T, b: T): T SegmentTree[T] = object node: seq[T] identityElement: T nodeCount: Natural innerNodeCount: Natural leafNodeCount: Natural merge: MergeOperator[T] proc initSegmentTree*[T](n: Natural, identityElement: T, merge: MergeOperator[T]): SegmentTree[T] = var n = nextPowerOfTwo(n) result.node = newSeqWith(2 * n, identityElement) result.identityElement = identityElement result.nodeCount = 2 * n - 1 result.innerNodeCount = n - 1 result.leafNodeCount = n result.merge = merge proc update*[T](self: var SegmentTree[T], x: Natural, value: T) = var idx = (x + self.innerNodeCount) self.node[idx] = value while idx > 1: idx = idx div 2 self.node[idx] = self.merge(self.node[idx * 2], self.node[idx * 2 + 1]) proc query*[T](self: var SegmentTree[T], l: Natural, r: Natural): T = # [l, r] var l = l + self.innerNodeCount var r = r + self.innerNodeCount + 1 var leftResult = self.identityElement var rightResult = self.identityElement while l < r: if l mod 2 == 1: leftResult = self.merge(leftResult, self.node[l]) inc l if r mod 2 == 1: dec r rightResult = self.merge(self.node[r], rightResult) l = l div 2 r = r div 2 result = self.merge(leftResult, rightResult) # -------------------------------------------------- # const INF = 10 ^ 6 let (N, Q) = input(int, 2) var A = @[0] & input(seq[int]) var seg = initSegmentTree[int](N, INF, ((n1: int, n2: int) => (min(n1, n2)))) var place = newSeq[int](N + 1) for i, a in A: place[a] = i seg.update(i, a) for _ in 1 .. Q: let (T, L, R) = input(int, 3) if T == 1: swap(place[A[L]], place[A[R]]) swap(A[L], A[R]) seg.update(L, A[L]) seg.update(R, A[R]) elif T == 2: echo place[seg.query(L, R)]