import kotlin.math.*

fun calculateHaversineDistance(
    lat1: Double, lon1: Double,
    lat2: Double, lon2: Double
): Double {
    val R = 6371 // Radius of the Earth in kilometers

    val dLat = Math.toRadians(lat2 - lat1)
    val dLon = Math.toRadians(lon2 - lon1)

    val a = sin(dLat / 2) * sin(dLat / 2) +
            cos(Math.toRadians(lat1)) * cos(Math.toRadians(lat2)) *
            sin(dLon / 2) * sin(dLon / 2)

    val c = 2 * atan2(sqrt(a), sqrt(1 - a))

    return R * c // Distance in kilometers
}

fun main() {
    // Example coordinates for two points
    val lat1 = 37.7749 // Latitude for point 1
    val lon1 = -122.4194 // Longitude for point 1

    val lat2 = 34.0522 // Latitude for point 2
    val lon2 = -118.2437 // Longitude for point 2

    val distance = calculateHaversineDistance(lat1, lon1, lat2, lon2)

    println("Distance between the two points: $distance kilometers")
}