How to set up an unusual health system?

Question

C++ / C#

We have a character whose initial xp=1, when he gets 50 points, his xp++, when he gets 100 points his xp++ again, and so on, I can't do it, I don't understand how to write the condition correctly. Note points are not scored equally, it is possible to go from 49 to 58.

Answer 1

Make an array of how much experience you need for a certain amount: 50 100 160 280 500 900 and so on.
Keep the total amount of experience, and when starting the scene / adding experience, recalculate the amount of hp

Answer 2

Pseudocode

function experienceUp(int amount)
{
    if (player.exp < 50 <= player.exp + amount) {
        player.health++
    } else if (player.exp < 100 <= player.exp + amount) {
        player.health++
    }
    player.exp += amount
}

Answer 3

public int Health => Exp / 50 + 1