def main():
    N = int(input())
    G = [[] for _ in range(N)]
    for i in range(N-1):
        u,v = map(int,input().split())
        u-=1;v-=1
        G[u].append(v)
        G[v].append(u)
    #print(G)
    stack = [0]
    par = [-1]*N
    leaf = 0
    while stack:
        v = stack.pop()
        cnt = 0
        for u in G[v]:
            if u == par[v]: continue
            par[u] = v
            stack.append(u)
            cnt += 1
        if cnt == 0:
            leaf += 1
    ans = N - leaf
    print(ans)
        
if __name__ == '__main__':
    main()