#include <stdio.h> #include <atcoder/all> #include <bits/stdc++.h> using namespace std; using namespace atcoder; using mint = modint998244353; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 1000000000 int main(){ int _t; cin>>_t; rep(_,_t){ long long N,M; cin>>N>>M; vector<long long> a(N); rep(i,N)cin>>a[i]; a.insert(a.begin(),M); a.push_back(0LL); vector<long long> b(a.size(),0); b[0] = M; rep(i,b.size()-2){ long long x = max(0LL,a[i+1]-b[i+1]); x = min(x,b[i]); b[i+1] += x; b[i+2] += b[i]-x; } if(a==b)cout<<"Yes"<<endl; else cout<<"No"<<endl; } return 0; }