import sys input = sys.stdin.buffer.readline class Bit: """1-indexed""" def __init__(self, n): self.size = n self.tree = [0] * (n + 1) def _sum(self, i): s = 0 while i > 0: s += self.tree[i] i -= i & -i return s def sum(self, i, j): """閉区間[i, j]""" return self._sum(j) - self._sum(i - 1) def add(self, i, x): while i <= self.size: self.tree[i] += x i += i & -i class SegmentTree: """ https://tjkendev.github.io/procon-library/python/range_query/ruq_segment_tree.html から拝借しています。 """ # N: 処理する区間の長さ def __init__(self, N): self.N = N self.N0 = 2 ** (self.N - 1).bit_length() self.data = [None] * (2 * self.N0) self.INF = (-1, 2 ** 31 - 1) # 区間[l, r)の値をvに書き換える # vは(t, value)というタプルにする (新しい値ほどtは大きくなる) def update(self, l, r, v): L = l + self.N0 R = r + self.N0 while L < R: if R & 1: R -= 1 self.data[R - 1] = v if L & 1: self.data[L - 1] = v L += 1 L >>= 1 R >>= 1 # a_iの現在の値を取得 def _query(self, k): k += self.N0 - 1 s = self.INF while k >= 0: if self.data[k]: s = max(s, self.data[k]) k = (k - 1) // 2 return s # これを呼び出す def query(self, k): return self._query(k)[1] N, Q = map(int, input().split()) A = map(int, input().split()) bit = Bit(N) for i, a in enumerate(A, 1): bit.add(i, a) seg_left = SegmentTree(N) seg_right = SegmentTree(N) t = 0 for i in range(1, N + 1): seg_left.update(i, i + 1, (t, i)) seg_right.update(i, i + 1, (t, i)) t += 1 for _ in range(Q): q, x = map(int, input().split()) if q == 1: new_left = seg_left.query(x) new_right = seg_right.query(x + 1) seg_left.update(x + 1, new_right + 1, (t, new_left)) seg_right.update(new_left, x + 1, (t, new_right)) t += 1 elif q == 2: left = seg_left.query(x) right = seg_right.query(x + 1) seg_left.update(x + 1, right + 1, (t, x + 1)) seg_right.update(left, x + 1, (t, x)) t += 1 elif q == 3: bit.add(x, 1) else: # q==4 left = seg_left.query(x) right = seg_right.query(x) print(bit.sum(left, right))