package main
 
import (
	"bufio"
	"os"
	"fmt"
	"strconv"
	"strings"
)
 
func main() {
 
	var t int
	fmt.Scanln(&t)
 
	for i := 0; i < t; i++ {
		scanner := bufio.NewScanner(os.Stdin)
		var n,k,ans,owns int
		owns = 0
		ans = 0
		fmt.Scanln(&n,&k) 
 
		scanner.Scan()
		s := scanner.Text()
		fmt.Println("s=",s)
		//s, _ := reader.ReadString('\n') 
		//s = strings.TrimSpace(s)
 
		ai := strings.Split(s," ")
 
		for j := 0; j < n; j++ {
			a, _ := strconv.Atoi(ai[j])
 
			if a >= k && a> 0{
				owns += a
			}else if a == 0 && owns > 0 {
				owns--
				ans++
			}
		}
		fmt.Println(ans)	
	}
}

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4
2 2
2 0
3 2
3 0 0
6 2
0 3 0 0 0 0
2 5
5 4