#include <stdio.h>

int i,j,k,l,t,n,a[100010];

int main()
{
    freopen("zvon.in","r",stdin);
    freopen("zvon.out","w",stdout);
    scanf("%d",&t);
    for (l=1;l<=t;++l)
    {
        scanf("%d",&n);
        for (i=1;i<=n;++i)
            a[i]=0;
        for (k=1;k<n;++k)
        {
            scanf("%d %d",&i,&j);
            a[i]++;
        }
        k=0;
        j=0;
        for (i=1;i<=n;++i)
        {
            if (a[i]-j>=0) k+=a[i]-j;
            if (a[i]>0) j=a[i]-1;
        }

        printf("%d\n",k);
    }

    return 0;
}