妈的考完之后发现没有考虑x = 0的边界条件 直接炸了 \n 按照题意模拟每天两个人走的步数即可。

import sys
def main():
    t = int(input())
    for _ in range(t):
        n, x, y = map(int, input().split())
        data = list(map(int, sys.stdin.readline().strip().split()))
        data.sort(reverse = True)
        total = 0
        today = 0
        if x == 0:
            print(0)
            break
        for i in range(n):
            today += 1
            total += data[i]
            x += y
            if total >= x:
                print(today)
                break
        else:
            print(-1)
if __name__ == "__main__":
    main()