Amazon - Online Assessment

1.js

function cellCompete(states, days) {
      if (days === 0) return states
      const a = new Array(states.length)
      states.push(0)
      states.unshift(0)
      for (var i = 1; i < states.length - 1; i++)
          a[i - 1] = states[i - 1] === states[i + 1]
              ? 0
              : 1
      return cellCompete(a, days - 1)
  }

2.js

function generalizedGCD(num, arr) {
    function gcd (a, b) {
        var cents = a % b
        if (cents === 0) return b
        return gcd(b, cents)
    }
    var hcf = arr[0]
    for (var i = 1; i < num; i++)
        hcf = gcd(hcf, arr[i])
    return hcf
}