/* -*- coding: utf-8 -*-
 *
 * 2015.cc:  No.2015 Stair Counter - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_N = 200000;

/* typedef */

/* global variables */

int as[MAX_N + 1];

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n, m;
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++) scanf("%d", as + i);
    as[0] = m;

    bool ok = true;

    for (int i = 1; i <= n; i++) {
      int d = as[i];
      if (i > 1) {
	if (as[i - 2] > d) { ok = false; break; }
	d -= as[i - 2];
      }

      if (d > as[i - 1]) { ok = false; break; }
      as[i - 1] -= d;
    }

    if (ok && as[n - 1] == 0) puts("Yes");
    else puts("No");
  }
  return 0;
}