For problem statement at 1000-1999/1500-1599/1500-1509/1500/problemA.txt this is a correct solution, but verifier at 1000-1999/1500-1599/1500-1509/1500/verifierA.go ends with All 100 tests passed can you fix the verifier? ```go
package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)
	writer := bufio.NewWriter(os.Stdout)
	defer writer.Flush()

	if !scanner.Scan() {
		return
	}
	n, _ := strconv.Atoi(scanner.Text())

	a := make([]int, n)
	for i := 0; i < n; i++ {
		scanner.Scan()
		a[i], _ = strconv.Atoi(scanner.Text())
	}

	type pair struct {
		x, y int
	}

	history := make([]pair, 5000001)

	for i := 0; i < n; i++ {
		for j := i + 1; j < n; j++ {
			sum := a[i] + a[j]
			p := history[sum]
			if p.x == 0 {
				history[sum] = pair{i + 1, j + 1}
			} else {
				if p.x != i+1 && p.x != j+1 && p.y != i+1 && p.y != j+1 {
					fmt.Fprintln(writer, "YES")
					fmt.Fprintln(writer, p.x, p.y, i+1, j+1)
					return
				}
			}
		}
	}

	fmt.Fprintln(writer, "NO")
}
```