#include<iostream>
using namespace std;

int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n,i,count=0;
        cin>>n;
        int a[n];
        for(int i=0;i<n;i++)
            cin>>a[i];
       for(i=0;i<n;i++)
        {
            if(a[i]>a[i+1])
            {
                a[i+1]=a[i+1] + (a[i]-a[i+1]);
                count++;
            }
           if(count>1)
               break;
                
        }
        if(count==1)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
    }
}