#include <bits/stdc++.h>
#define pb push_back
#define all(x) x.begin(), x.end()
#define small_black_cock cout
using namespace std;
using ll = long long;




int main() {
    int t;
    cin >> t;

    for(int k = 0; k < t; k++){
        int n;
        cin >> n;
        vector<int> a(n), b(n);
        for(int i = 0; i < n; i++) cin >> a[i];
        for(int i = 0; i < n; i++) cin >> b[i];
        int zeroID = -1;
        int nozeroID = -1;
        vector<int> d(n);
        bool flag = false;
        for(int i =0; i < n; i++){
            if(b[i] == 0){
                d[i] = a[i];
                zeroID = i;
            }else{
                d[i] = a[i] - b[i];
                if(d[i] < 0){
                    flag = true;
                    break;
                }
                if(zeroID != -1){
                    if(d[zeroID] >  d[i]){
                        flag = true;
                        break;
                    }
                    zeroID = -1;

                }
                if(nozeroID != -1){
                    if(d[nozeroID] > d[i]){
                        flag = true;
                        break;
                    }
                }
                nozeroID = i;
//                cout << nozeroID << " ";
            }


        }
        if(!flag){
            cout<< "YES" << "\n";
        }else{
            cout << "NO" << "\n";
        }



    }

    return 0;
}