For problem statement at 0-999/400-499/410-419/419/problemE.txt this is a correct solution, but verifier at 0-999/400-499/410-419/419/verifierE.go ends with case 1 failed: expected 4 got 2
input:
1 5
-7 4 5
exit status 1 can you fix the verifier? package main

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

type Event struct {
	angle float64
	delta int
}

func main() {
	reader := bufio.NewReader(os.Stdin)
	var n int
	var d float64
	if _, err := fmt.Fscan(reader, &n, &d); err != nil {
		return
	}

	var events []Event

	for i := 0; i < n; i++ {
		var x, y, r float64
		fmt.Fscan(reader, &x, &y, &r)

		D := math.Hypot(x, y)
		theta := math.Atan2(y, x)
		if theta < 0 {
			theta += 2 * math.Pi
		}

		kmin := int(math.Floor((D-r)/d)) - 1
		if kmin < 1 {
			kmin = 1
		}
		kmax := int(math.Ceil((D+r)/d)) + 1

		for k := kmin; k <= kmax; k++ {
			kd := float64(k) * d
			if kd < D-r-1e-7 || kd > D+r+1e-7 {
				continue
			}
			V := (kd*kd + D*D - r*r) / (2 * kd * D)
			if V > 1.0 {
				V = 1.0
			} else if V < -1.0 {
				V = -1.0
			}

			delta := math.Acos(V)
			L := theta - delta
			R := theta + delta

			if L < 0 {
				events = append(events, Event{L + 2*math.Pi, 1}, Event{2 * math.Pi, -1})
				events = append(events, Event{0, 1}, Event{R, -1})
			} else if R >= 2*math.Pi {
				events = append(events, Event{L, 1}, Event{2 * math.Pi, -1})
				events = append(events, Event{0, 1}, Event{R - 2*math.Pi, -1})
			} else {
				events = append(events, Event{L, 1}, Event{R, -1})
			}
		}
	}

	sort.Slice(events, func(i, j int) bool {
		if math.Abs(events[i].angle-events[j].angle) > 1e-11 {
			return events[i].angle < events[j].angle
		}
		return events[i].delta > events[j].delta
	})

	maxOverlap := 0
	currentOverlap := 0
	for _, e := range events {
		currentOverlap += e.delta
		if currentOverlap > maxOverlap {
			maxOverlap = currentOverlap
		}
	}

	fmt.Println(maxOverlap)
}