// yukicoder: 806 木を道に
// 2019.5.12 bal4u

#include <stdio.h>

#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif
int in()    // 非負整数の入力
{
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf), c = gc(); while (c >= '0');
	return n;
}

int hi[100005];

int main()
{
	int i, N, ans;
	
	N = in(); for (i = 1; i < N; i++) hi[in()]++, hi[in()]++;
	ans = 0;
	for (i = 1; i <= N; i++) if (hi[i] > 2) ans += hi[i]-2;
	printf("%d\n", ans);
	return 0;
}