#include<stdio.h>
#include<stdlib.h>
#include<stdint.h>
#include<inttypes.h>

typedef int32_t i32;

void run (void) {
  i32 n;
  scanf ("%" SCNi32, &n);
  i32 *cnt = (i32 *) calloc (n + 1, sizeof (i32));
  for (i32 i = 1; i < n; ++i) {
    i32 a, b;
    scanf ("%" SCNi32 "%" SCNi32, &a, &b);
    cnt[a]++;
    cnt[b]++;
  }
  i32 ans = 0;
  for (i32 i = 1; i <= n; ++i) {
    if (cnt[i] == 1) {
      ans++;
    }
  }
  printf("%" PRIi32 "\n", ans - 2);
}

int main (void) {
  run ();
  return 0;
}