def divisors(M): d=[] i=1 while M>=i**2: if M%i==0: d.append(i) if i**2!=M: d.append(M//i) i=i+1 return d def popcount(x): x = x - ((x >> 1) & 0x55555555) x = (x & 0x33333333) + ((x >> 2) & 0x33333333) x = (x + (x >> 4)) & 0x0f0f0f0f x = x + (x >> 8) x = x + (x >> 16) return x & 0x0000007f def eratosthenes(n): res=[0 for i in range(n+1)] prime=set([]) for i in range(2,n+1): if not res[i]: prime.add(i) for j in range(1,n//i+1): res[i*j]=1 return prime def factorization(n): res=[] for p in prime: if n%p==0: while n%p==0: n//=p res.append(p) if n!=1: res.append(n) return res def euler_phi(n): res = n for x in range(2,n+1): if x ** 2 > n: break if n%x==0: res = res//x * (x-1) while n%x==0: n //= x if n!=1: res = res//n * (n-1) return res def ind(b,n): res=0 while n%b==0: res+=1 n//=b return res def isPrimeMR(n): d = n - 1 d = d // (d & -d) L = [2, 3, 5, 7, 11, 13, 17] for a in L: t = d y = pow(a, t, n) if y == 1: continue while y != n - 1: y = (y * y) % n if y == 1 or t == n - 1: return 0 t <<= 1 return 1 def findFactorRho(n): from math import gcd m = 1 << n.bit_length() // 8 for c in range(1, 99): f = lambda x: (x * x + c) % n y, r, q, g = 2, 1, 1, 1 while g == 1: x = y for i in range(r): y = f(y) k = 0 while k < r and g == 1: ys = y for i in range(min(m, r - k)): y = f(y) q = q * abs(x - y) % n g = gcd(q, n) k += m r <<= 1 if g == n: g = 1 while g == 1: ys = f(ys) g = gcd(abs(x - ys), n) if g < n: if isPrimeMR(g): return g elif isPrimeMR(n // g): return n // g return findFactorRho(g) def primeFactor(n): i = 2 ret = {} rhoFlg = 0 while i*i <= n: k = 0 while n % i == 0: n //= i k += 1 if k: ret[i] = k i += 1 + i % 2 if i == 101 and n >= 2 ** 20: while n > 1: if isPrimeMR(n): ret[n], n = 1, 1 else: rhoFlg = 1 j = findFactorRho(n) k = 0 while n % j == 0: n //= j k += 1 ret[j] = k if n > 1: ret[n] = 1 if rhoFlg: ret = {x: ret[x] for x in sorted(ret)} return ret def divisors(n): res = [1] prime = primeFactor(n) for p in prime: newres = [] for d in res: for j in range(prime[p]+1): newres.append(d*p**j) res = newres res.sort() return res def xorconv(n,X,Y): if n==0: res=[(X[0]*Y[0])%mod] return res x=[X[i]+X[i+2**(n-1)] for i in range(2**(n-1))] y=[Y[i]+Y[i+2**(n-1)] for i in range(2**(n-1))] z=[X[i]-X[i+2**(n-1)] for i in range(2**(n-1))] w=[Y[i]-Y[i+2**(n-1)] for i in range(2**(n-1))] res1=xorconv(n-1,x,y) res2=xorconv(n-1,z,w) former=[(res1[i]+res2[i])*inv for i in range(2**(n-1))] latter=[(res1[i]-res2[i])*inv for i in range(2**(n-1))] former=list(map(lambda x:x%mod,former)) latter=list(map(lambda x:x%mod,latter)) return former+latter def merge_sort(A,B): pos_A,pos_B = 0,0 n,m = len(A),len(B) res = [] while pos_A < n and pos_B < m: a,b = A[pos_A],B[pos_B] if a < b: res.append(a) pos_A += 1 else: res.append(b) pos_B += 1 res += A[pos_A:] res += B[pos_B:] return res class UnionFindVerSize(): def __init__(self, N): self._parent = [n for n in range(0, N)] self._size = [1] * N self.group = N def find_root(self, x): if self._parent[x] == x: return x self._parent[x] = self.find_root(self._parent[x]) stack = [x] while self._parent[stack[-1]]!=stack[-1]: stack.append(self._parent[stack[-1]]) for v in stack: self._parent[v] = stack[-1] return self._parent[x] def unite(self, x, y): gx = self.find_root(x) gy = self.find_root(y) if gx == gy: return self.group -= 1 if self._size[gx] < self._size[gy]: self._parent[gx] = gy self._size[gy] += self._size[gx] else: self._parent[gy] = gx self._size[gx] += self._size[gy] def get_size(self, x): return self._size[self.find_root(x)] def is_same_group(self, x, y): return self.find_root(x) == self.find_root(y) class WeightedUnionFind(): def __init__(self,N): self.parent = [i for i in range(N)] self.size = [1 for i in range(N)] self.val = [0 for i in range(N)] self.flag = True self.edge = [[] for i in range(N)] def dfs(self,v,pv): stack = [(v,pv)] new_parent = self.parent[pv] while stack: v,pv = stack.pop() self.parent[v] = new_parent for nv,w in self.edge[v]: if nv!=pv: self.val[nv] = self.val[v] + w stack.append((nv,v)) def unite(self,x,y,w): if not self.flag: return if self.parent[x]==self.parent[y]: self.flag = (self.val[x] - self.val[y] == w) return if self.size[self.parent[x]]>self.size[self.parent[y]]: self.edge[x].append((y,-w)) self.edge[y].append((x,w)) self.size[x] += self.size[y] self.val[y] = self.val[x] - w self.dfs(y,x) else: self.edge[x].append((y,-w)) self.edge[y].append((x,w)) self.size[y] += self.size[x] self.val[x] = self.val[y] + w self.dfs(x,y) class Dijkstra(): class Edge(): def __init__(self, _to, _cost): self.to = _to self.cost = _cost def __init__(self, V): self.G = [[] for i in range(V)] self._E = 0 self._V = V @property def E(self): return self._E @property def V(self): return self._V def add_edge(self, _from, _to, _cost): self.G[_from].append(self.Edge(_to, _cost)) self._E += 1 def shortest_path(self, s): import heapq que = [] d = [10**15] * self.V d[s] = 0 heapq.heappush(que, (0, s)) while len(que) != 0: cost, v = heapq.heappop(que) if d[v] < cost: continue for i in range(len(self.G[v])): e = self.G[v][i] if d[e.to] > d[v] + e.cost: d[e.to] = d[v] + e.cost heapq.heappush(que, (d[e.to], e.to)) return d #Z[i]:length of the longest list starting from S[i] which is also a prefix of S #O(|S|) def Z_algorithm(s): N = len(s) Z_alg = [0]*N Z_alg[0] = N i = 1 j = 0 while i < N: while i+j < N and s[j] == s[i+j]: j += 1 Z_alg[i] = j if j == 0: i += 1 continue k = 1 while i+k < N and k + Z_alg[k] 0: res_sum += self.BIT[idx] if mod: res_sum %= mod idx -= idx&(-idx) return res_sum #Ai += x O(logN) def update(self,idx,x): mod = self.mod while idx <= self.num: self.BIT[idx] += x if mod: self.BIT[idx] %= mod idx += idx&(-idx) return class dancinglink(): def __init__(self,n,debug=False): self.n = n self.debug = debug self._left = [i-1 for i in range(n)] self._right = [i+1 for i in range(n)] self.exist = [True for i in range(n)] def pop(self,k): if self.debug: assert self.exist[k] L = self._left[k] R = self._right[k] if L!=-1: if R!=self.n: self._right[L],self._left[R] = R,L else: self._right[L] = self.n elif R!=self.n: self._left[R] = -1 self.exist[k] = False def left(self,idx,k=1): if self.debug: assert self.exist[idx] res = idx while k: res = self._left[res] if res==-1: break k -= 1 return res def right(self,idx,k=1): if self.debug: assert self.exist[idx] res = idx while k: res = self._right[res] if res==self.n: break k -= 1 return res class SparseTable(): def __init__(self,A,merge_func,ide_ele): N = len(A) self.merge_func = merge_func self.lg = [0]*(N + 1) for i in range(2, N+1): self.lg[i] = self.lg[i >> 1] + 1 self.pow_2 = [pow(2,i) for i in range(20)] self.table = [None]*(self.lg[N] + 1) st0 = self.table[0] = [a for a in A] b = 1 for i in range(self.lg[N]): st0 = self.table[i+1] = [self.merge_func(u,v) for u, v in zip(st0, st0[b:])] b <<= 1 def query(self,s,t): b = t-s+1 m = self.lg[b] return self.merge_func(self.table[m][s],self.table[m][t-self.pow_2[m]+1]) class BinaryTrie: class node: def __init__(self,val): self.left = None self.right = None self.max = val def __init__(self): self.root = self.node(-10**15) def append(self,key,val): pos = self.root for i in range(29,-1,-1): pos.max = max(pos.max,val) if key>>i & 1: if pos.right is None: pos.right = self.node(val) pos = pos.right else: pos = pos.right else: if pos.left is None: pos.left = self.node(val) pos = pos.left else: pos = pos.left pos.max = max(pos.max,val) def search(self,M,xor): res = -10**15 pos = self.root for i in range(29,-1,-1): if pos is None: break if M>>i & 1: if xor>>i & 1: if pos.right: res = max(res,pos.right.max) pos = pos.left else: if pos.left: res = max(res,pos.left.max) pos = pos.right else: if xor>>i & 1: pos = pos.right else: pos = pos.left if pos: res = max(res,pos.max) return res def solveequation(edge,ans,n,m): #edge=[[to,dire,id]...] def dfs(v): used[v]=True r=ans[v] for to,dire,id in edge[v]: if used[to]: continue y=dfs(to) if dire==-1: x[id]=y else: x[id]=-y r+=y return r x=[0]*m used=[False]*n for v in range(n): if used[v]: continue y = dfs(v) if y!=0: return False return x class slope_trick(): def __init__(self): self.L = [10**17] self.R = [10**17] self.min_f = 0 self.x_left = 0 self.x_right = 0 def add_right(self,a): a -= self.x_left l0 = -self.L[0] self.min_f = self.min_f + max(0,l0-a) if l0 <= a: a += self.x_left a -= self.x_right heappush(self.R,a) else: heappush(self.L,-a) a = -heappop(self.L) a += self.x_left a -= self.x_right heappush(self.R,a) #self.min_f = self.min_f + max(0,l0-a) def add_left(self,a): a -= self.x_right r0 = self.R[0] self.min_f = self.min_f + max(0,a-r0) if a <= r0: a += self.x_right a -= self.x_left heappush(self.L,-a) else: heappush(self.R,a) a = heappop(self.R) a += self.x_right a -= self.x_left heappush(self.L,-a) #self.min_f = self.min_f + max(0,a-r0) def add_abs(self,a): self.add_left(a) self.add_right(a) def change_min_slide(self,a,b): self.x_left += a self.x_right += b def get_val(self,x): L = [-l+self.x_left for l in self.L] L.sort() R = [r+self.x_right for r in self.R] R.sort() res = self.min_f if 0 < L[-1]: L = L[::-1] n = len(L) for i in range(n): c0 = L[i] c1 = L[i+1] if c1 <= x <= c0: res += (i+1) * (c0-x) break else: res += (i+1) * (c0-c1) return res elif L[-1] <= x <= R[0]: return res else: n = len(R) for i in range(n): c0 = R[i] c1 = R[i+1] if c0 <= x <= c1: res += (i+1) * (x-c0) break else: res += (i+1) * (c1-c0) return res def fwt(n,A): assert len(A) == 2**n for i in range(n): t = 2**i for j in range(2**n): if j&t==0: A[j] += A[j|t] return A def ifwt(n,A): assert len(A) == 2**n for i in range(n): t = 2**i for j in range(2**n): if j&t==0: A[j] -= A[j|t] return A class SegmentTree: def __init__(self, init_val, segfunc, ide_ele): n = len(init_val) self.segfunc = segfunc self.ide_ele = ide_ele self.num = 1 << (n - 1).bit_length() self.tree = [ide_ele] * 2 * self.num self.size = n for i in range(n): self.tree[self.num + i] = init_val[i] for i in range(self.num - 1, 0, -1): self.tree[i] = self.segfunc(self.tree[2 * i], self.tree[2 * i + 1]) def update(self, k, x): k += self.num self.tree[k] = x while k > 1: k >>= 1 self.tree[k] = self.segfunc(self.tree[2*k], self.tree[2*k+1]) def query(self, l, r): if r==self.size: r = self.num res = self.ide_ele l += self.num r += self.num right = [] while l < r: if l & 1: res = self.segfunc(res, self.tree[l]) l += 1 if r & 1: right.append(self.tree[r-1]) l >>= 1 r >>= 1 for e in right[::-1]: res = self.segfunc(res,e) return res import sys from math import gcd input = lambda :sys.stdin.readline().rstrip() mi = lambda :map(int,input().split()) li = lambda :list(mi()) M = 2 * 10**5 N = int(input()) A = li() + [0] idx = [N for i in range(M+1)] for i in range(N): if idx[A[i]]==N: idx[A[i]] = i else: A[i] = 0 zero = 0 res = 0 for i in range(N): if A[i]==0: continue res += 1 plus = A[i] - zero for j in range(zero+1,zero+plus): if idx[j+plus] > idx[j]: A[idx[j+plus]] = 0 A[idx[j]] = j+plus idx[j+plus] = idx[j] else: A[idx[j]] = 0 #print(A,idx) zero = A[i] print(res)