#include <cstdio>
#include <list>

struct Node {
    std::list<unsigned> neighbourList;
    bool marked;
    Node(): marked(false) { }
};


int main() {
    unsigned n, i, a, b, cuts, markedNeighbours;

    scanf("%u", &n);
    Node nodes[n + 1];
    for(i = 0; i < n - 1; ++i) {
        scanf("%u %u", &a, &b);
        nodes[a].neighbourList.push_back(b);
        nodes[b].neighbourList.push_back(a);
    }

    cuts = 0;
    for(i = 1; i <= n; ++i) {
        if(nodes[i].neighbourList.size() > 2) {
            cuts += nodes[i].neighbourList.size() - 2;
        }
    }

    printf("%u\n", cuts);

    return 0;
}