class Graph:
    #入力定義
    def __init__(self,vertex=[]):
        self.vertex=set(vertex)

        self.edge_number=0
        self.adjacent={v:set() for v in vertex}

    #頂点の追加
    def add_vertex(self,*adder):
        for v in adder:
            if not self.vertex_exist(v):
                self.adjacent[v]=set()
                self.vertex.add(v)

    #辺の追加
    def add_edge(self,u,v):
        self.add_vertex(u)
        self.add_vertex(v)

        if not self.edge_exist(u,v):
            self.adjacent[u].add(v)
            self.adjacent[v].add(u)
            self.edge_number+=1

    #辺を除く
    def remove_edge(self,u,v):
        self.add_vertex(u)
        self.add_vertex(v)

        if self.edge_exist(u,v):
            self.adjacent[u].discard(v)
            self.adjacent[v].discard(u)
            self.edge_number-=1

    #頂点を除く
    def remove_vertex(self,*vertexes):
        for v in vertexes:
            if self.vertex_exist(v):
                U=self.neighbohood(v)
                for u in U:
                    self.edge_number-=1
                    self.adjacent[u].discard(v)

                del self.adjacent[v]
                self.vertex.discard(v)

    #Walkの追加
    def add_walk(self,*walk):
        n=len(walk)
        for i in range(n-1):
            self.add_edge(walk[i],walk[i+1])

    #Cycleの追加
    def add_cycle(self,*cycle):
        self.add_walk(*cycle)
        self.add_edge(cycle[-1],cycle[0])

    #頂点の交換
    def __vertex_swap(self,p,q):
        self.vertex.sort()

    #グラフに頂点が存在するか否か
    def vertex_exist(self,v):
        return v in self.vertex

    #グラフに辺が存在するか否か
    def edge_exist(self,u,v):
        if not(self.vertex_exist(u) and self.vertex_exist(v)):
            return False
        return v in self.adjacent[u]

    #近傍
    def neighbohood(self,v):
        if not self.vertex_exist(v):
            return []
        return list(self.adjacent[v])

    #次数
    def degree(self,v):
        if not self.vertex_exist(v):
            return 0

        return len(self.adjacent[v])

    #頂点数
    def vertex_count(self):
        return len(self.vertex)

    #辺数
    def edge_count(self):
        return self.edge_number

    #頂点vを含む連結成分
    def connected_component(self,v):
        if v not in self.adjacent:
            return []

        from collections import deque
        T={u:0 for u in self.vertex}
        T[v]=1
        Q=deque([v])
        while Q:
            u=Q.popleft()
            for w in self.adjacent[u]:
                if not T[w]:
                    T[w]=1
                    Q.append(w)
        return [x for x in self.adjacent if T[x]]

    #距離
    def distance(self,u,v):
        from collections import deque
        inf=float("inf")
        T={v:inf  for v in self.vertex}

        if u==v:
            return 0
        Q=deque([u])
        T[u]=0
        while Q:
            w=Q.popleft()
            for x in self.adjacent[w]:
                if T[x]==inf:
                    T[x]=T[w]+1
                    Q.append(x)
                    if x==v:
                        return T[x]
        return inf

    #ある1点からの距離
    def distance_all(self,u):
        from collections import deque
        inf=float("inf")
        T={v:inf  for v in self.vertex}

        Q=deque([u])
        T[u]=0
        while Q:
            w=Q.popleft()
            for x in self.adjacent[w]:
                if T[x]==inf:
                    T[x]=T[w]+1
                    Q.append(x)
        return T

    #最短路
    def shortest_path(self,u,v):
        from collections import deque
        inf=float("inf")
        T={v:None for v in self.vertex}

        if u==v:
            return [u]

        Q=deque([u])
        T[u]=u
        while Q:
            w=Q.popleft()
            for x in self.adjacent[w]:
                if not T[x]:
                    T[x]=w
                    Q.append(x)
                    if x==v:
                        P=[v]
                        a=v
                        while a!=u:
                            a=T[a]
                            P.append(a)
                        return P[::-1]
        return None

    #何かしらの頂点を選ぶ.
    def poping_vertex(self):
        v=self.vertex.pop()
        self.vertex.add(v)
        return v

#連結成分に分解
def Connected_Component_Decomposition(G):
    T={v:False for v in G.vertex}
    C=[]
    for v in G.vertex:
        if not T[v]:
            X=G.connected_component(v)
            for x in X:
                T[x]=True
            C.append(X)
    return C

#連結成分の個数
def Connected_Component_Number(G):
    T={v:False for v in G.vertex}
    C=0
    for v in G.vertex:
        if not T[v]:
            X=G.connected_component(v)
            for x in X:
                T[x]=True
            C+=1
    return C
#==================================================
import sys
input=sys.stdin.readline
N=int(input())

G=Graph(list(range(1,N+1)))
for _ in range(N-1):
    u,v=map(int,input().split())
    G.add_edge(u,v)

X=[v for v in range(1,N+1) if G.degree(v)==1]

Flag=1
while Flag:
    Flag=0

    Y=[]
    for x in X:
        if G.degree(x)==0: continue

        Flag=1
        y=G.neighbohood(x)[0]
        M=G.neighbohood(y)
        G.remove_vertex(y)

        for z in M:
            if G.degree(z)==1:
                Y.append(z)
    X=Y

print(Connected_Component_Number(G))