For problem statement at 1000-1999/1900-1999/1990-1999/1999/problemG1.txt this is a correct solution, but verifier at 1000-1999/1900-1999/1990-1999/1999/verifierG1.go ends with target output invalid on test 1: expected 1 values, got 32
output:
? 1 500
? 1 251
? 1 126
? 1 64
? 1 33
? 1 17
? 1 9
? 1 5
? 1 3
? 1 2
! 2
exit status 1 can you fix the verifier? ```go
package main

import (
	"fmt"
	"os"
)

func main() {
	var t int
	fmt.Scan(&t)
	for test := 0; test < t; test++ {
		low := 2
		high := 999
		for low < high {
			mid := (low + high) / 2
			fmt.Printf("? 1 %d\n", mid)
			os.Stdout.Sync()
			var resp int
			fmt.Scan(&resp)
			if resp == -1 {
				os.Exit(0)
			}
			if resp == mid {
				low = mid + 1
			} else {
				high = mid
			}
		}
		fmt.Printf("! %d\n", low)
		os.Stdout.Sync()
	}
}
```