#include<stdio.h>//求出葉子結點數除以2
#include<string.h>
int main()
{
    int n,sum,a,b,i,d[10001];
    while(scanf("%d",&n)!=EOF){
        memset(d,0,sizeof(d));
        sum=0;
        for(i=1;i<n;++i){
            scanf("%d%d",&a,&b);
            d[a]++;
            d[b]++;
        }
        for
 
(i=1;i<=n;++i)
            if(d[i]==1)
                sum++;
        if(sum&1)
            printf("%d\n",(sum+1)/2);
        else
            printf("%d\n",sum/2);
    }
    return 0;
}