For problem statement at 0-999/0-99/10-19/18/problemA.txt this is a correct solution, but verifier at 0-999/0-99/10-19/18/verifierA.go ends with All tests passed can you fix the verifier? package main

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

type P struct {
	x, y int
}

func dist2(a, b P) int {
	dx := a.x - b.x
	dy := a.y - b.y
	return dx*dx + dy*dy
}

func isRight(p []P) bool {
	s := []int{
		dist2(p[0], p[1]),
		dist2(p[1], p[2]),
		dist2(p[0], p[2]),
	}
	sort.Ints(s)
	return s[0] > 0 && s[1] > 0 && s[0]+s[1] == s[2]
}

func main() {
	in := bufio.NewReader(os.Stdin)

	var x1, y1, x2, y2, x3, y3 int
	fmt.Fscan(in, &x1, &y1, &x2, &y2, &x3, &y3)

	p := []P{{x1, y1}, {x2, y2}, {x3, y3}}

	if isRight(p) {
		fmt.Println("RIGHT")
		return
	}

	dirs := []P{{1, 0}, {-1, 0}, {0, 1}, {0, -1}}

	for i := 0; i < 3; i++ {
		for _, d := range dirs {
			q := make([]P, 3)
			copy(q, p)
			q[i].x += d.x
			q[i].y += d.y
			if isRight(q) {
				fmt.Println("ALMOST")
				return
			}
		}
	}

	fmt.Println("NEITHER")
}