#include <bits/stdc++.h>

using namespace std;

int N;
vector<int> G[100010];
bool remv[100010];

void dfs(int u, int p) {
  remv[u] = false;
  for(int v : G[u]) if(v != p) dfs(v, u);
  if(~p && !remv[u]) remv[p] = true;
}

int main() {
  cin >> N;
  for(int i = 0; i < N-1; ++i) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    G[u].push_back(v);
    G[v].push_back(u);
  }
  if(N < 3) {
    cout << 1 << endl;
    return 0;
  }
  int root = 0;
  while(G[root].size() < 2) ++root;
  dfs(root, -1);
  cout << count(remv, remv+N, false) << endl;

  return 0;
}