import sys

def main():
    n = int(sys.stdin.readline())
    # Skip red edges
    for _ in range(n-1):
        sys.stdin.readline()
    # Read black edges and calculate degrees
    degree = [0] * (n + 1)
    for _ in range(n-1):
        c, d = map(int, sys.stdin.readline().split())
        degree[c] += 1
        degree[d] += 1
    # Calculate the sum of (max(0, degree - 2)) for all nodes
    sum_degree = sum(max(0, d - 2) for d in degree)
    ans = (n - 1) + sum_degree
    print(ans)

if __name__ == "__main__":
    main()