B

#include <bits/stdc++.h>

using namespace std;

#define ll     long long
#define pb     push_back

int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        ll int n, k;
        cin >> n >> k;

        ll int a[n];
        for (int i = 0; i < n; i++)
            cin >> a[i];

        ll int b[n + 1] = {0};
        for (int i = 0; i < n; i++)
        {
            int x;
            cin >> x;
            b[abs(x)] += a[i];
        }

        int f = 1;
        ll int rem = 0;

        for (int i = 1; i <= n; i++)
        {
            int tmp = min(b[i], rem);
            b[i] -= tmp;
            rem -= tmp;
            if (b[i] > k)
                f = 0;
            else
                rem += k - b[i];
        }

        if(f)
            cout << "YES\n";
        else
            cout << "NO\n";
    }
}