#include<iostream>
#define init(x,y) memset(x,y,sizeof(x))
#define MAX 50010
using namespace std;
int n, m, i, j, k, t, a, b;
int num[MAX],flag[MAX],team[MAX],suv[MAX]; 
int main() {
    scanf("%d", &t);
    while (t--) {
        int max[2] = { 0 };
        int cnt = 0;
        int sum = 0;
        int l = 0;
        init(suv, 0);
        init(flag, 0);
        scanf("%d%d", &n, &m);
        for (int i = 1; i <=n; i++) {
            scanf("%d%d", team + i, num + i);
        }
        for (int i = 0; i < m; i++) {
            scanf("%d", &j);
            flag[j]++;
        }
        for (int i = n ; i > 0; i--) {
            cnt += flag[i];
            int temp = num[i] + cnt;
            if (temp < max[!team[i]]) {
                suv[i] = 1;
            }
            
            if (max[team[i]] < num[i] + cnt) {
                max[team[i]] = num[i] + cnt;
            }
        }
        for (int i = 1; i <= n; i++) {
            if (suv[i] == 0) {
                sum++;
            }
        }
        printf("%d\n", sum);
    }
    return 0;
}