import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;

class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	void run() {
		Scanner sc = new Scanner();
		int N = sc.nextInt();
		boolean[] ex = new boolean[N];
		int[] deg = new int[N];
		Arrays.fill(ex, true);
		ArrayDeque<Integer> pd = new ArrayDeque<Integer>();
		ArrayList<Integer>[] g = new ArrayList[N];
		for (int i = 0; i < N; ++i) {
			g[i] = new ArrayList<>();
		}
		for (int i = 0; i < N - 1; ++i) {
			int u = sc.nextInt() - 1;
			int v = sc.nextInt() - 1;
			g[u].add(v);
			g[v].add(u);
			++deg[u];
			++deg[v];
		}
		if (N == 1) {
			System.out.println(1);
			return;
		}
		for (int i = 0; i < N; ++i) {
			if (deg[i] == 1)
				pd.add(i);
		}
		int ans = 0;
		while (!pd.isEmpty()) {
			int u = pd.poll();
			if (!ex[u])
				continue;
			for (int v : g[u]) {
				if (!ex[v])
					continue;
				ex[v] = false;
				for (int v2 : g[v]) {
					if (!ex[v2])
						continue;
					--deg[v2];
					if (deg[v2] == 0) {
						++ans;
						ex[v2] = false;
					} else if (deg[v2] == 1) {
						pd.add(v2);
					}
				}
			}
		}
		System.out.println(ans);
	}

	void tr(Object... o) {
		System.out.println(Arrays.deepToString(o));
	}

}

class Scanner {
	private final InputStream in = System.in;
	private final byte[] buffer = new byte[1024];
	private int ptr = 0;
	private int buflen = 0;

	private boolean hasNextByte() {
		if (ptr < buflen) {
			return true;
		} else {
			ptr = 0;
			try {
				buflen = in.read(buffer);
			} catch (IOException e) {
				e.printStackTrace();
			}
			if (buflen <= 0) {
				return false;
			}
		}
		return true;
	}

	private int readByte() {
		if (hasNextByte())
			return buffer[ptr++];
		else
			return -1;
	}

	private static boolean isPrintableChar(int c) {
		return 33 <= c && c <= 126;
	}

	private void skipUnprintable() {
		while (hasNextByte() && !isPrintableChar(buffer[ptr]))
			ptr++;
	}

	public boolean hasNext() {
		skipUnprintable();
		return hasNextByte();
	}

	public String next() {
		if (!hasNext())
			throw new NoSuchElementException();
		StringBuilder sb = new StringBuilder();
		int b = readByte();
		while (isPrintableChar(b)) {
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}

	public long nextLong() {
		if (!hasNext())
			throw new NoSuchElementException();
		long n = 0;
		boolean minus = false;
		int b = readByte();
		if (b == '-') {
			minus = true;
			b = readByte();
		}
		if (b < '0' || '9' < b) {
			throw new NumberFormatException();
		}
		while (true) {
			if ('0' <= b && b <= '9') {
				n *= 10;
				n += b - '0';
			} else if (b == -1 || !isPrintableChar(b)) {
				return minus ? -n : n;
			} else {
				throw new NumberFormatException();
			}
			b = readByte();
		}
	}

	public int nextInt() {
		return (int) nextLong();
	}
}