chocolateFeast.js

// source: https://www.hackerrank.com/challenges/chocolate-feast/problem
// video: https://youtu.be/TPjNYmUzOdg
function chocolateFeast(n, c, m) {
    // initial buy
    let bars = Math.floor(n/c)
    let wrappers = bars
    while (wrappers >= m){
        // buy more bars
        const additionalBars = Math.floor(wrappers/m)
        bars += additionalBars
        // handle reduction of old & addition of new wrappers
        wrappers = wrappers % m
        wrappers += additionalBars
    }
    return bars
}