For problem statement at 1000-1999/1800-1899/1840-1849/1848/problemA.txt this is a correct solution, but verifier at 1000-1999/1800-1899/1840-1849/1848/verifierA.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, k int
		fmt.Fscan(in, &n, &m, &k)

		var x, y int
		fmt.Fscan(in, &x, &y)
		p := (x + y) % 2

		ok := true
		for i := 0; i < k; i++ {
			var xi, yi int
			fmt.Fscan(in, &xi, &yi)
			if (xi+yi)%2 == p {
				ok = false
			}
		}

		if ok {
			fmt.Fprintln(out, "YES")
		} else {
			fmt.Fprintln(out, "NO")
		}
	}
}