For problem statement at 1000-1999/1400-1499/1420-1429/1426/problemB.txt this is a correct solution, but verifier at 1000-1999/1400-1499/1420-1429/1426/verifierB.go ends with All tests passed can you fix the verifier? package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	in := bufio.NewReaderSize(os.Stdin, 1<<20)
	out := bufio.NewWriterSize(os.Stdout, 1<<20)
	defer out.Flush()

	var t int
	fmt.Fscan(in, &t)
	for ; t > 0; t-- {
		var n, m int
		fmt.Fscan(in, &n, &m)
		ok := false
		for i := 0; i < n; i++ {
			var a, b, c, d int
			fmt.Fscan(in, &a, &b)
			fmt.Fscan(in, &c, &d)
			if b == c {
				ok = true
			}
		}
		if m%2 == 0 && ok {
			fmt.Fprintln(out, "YES")
		} else {
			fmt.Fprintln(out, "NO")
		}
	}
}