#include <cstdio>
#include <vector>
using namespace std;
const int MAXN = 100001;
int n, m, rez, c;
int d[MAXN];
vector <int> graph[MAXN];
void dis(int x) {
m-=d[x];
for (int j = 0; j < graph[x].size(); j++) {
if (d[graph[x][j]] > 0) {
d[graph[x][j]]--;
}
}
d[x] = 0;
}
int main() {
scanf("%d", &n);
m = n - 1;
rez = 0;
for (int i = 0; i < m; i++) {
int a, b;
scanf("%d%d", &a, &b);
d[a]++;
d[b]++;
graph[a].push_back(b);
graph[b].push_back(a);
}
while (m > 0) {
for (int i = 1; i <= n; i++) {
if (d[i] == 1) {
c = i;
break;
}
}
for (int i = 0; i < graph[c].size(); i++) {
if (d[graph[c][i]] > 0) {
dis(graph[c][i]);
rez++;
break;
}
}
}
printf("%d", rez);
}
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