Deficient solution to Majority Element

MajorityElement1.kt

class Solution {

    fun majorityElement(nums: IntArray): Int {
        var count = 0
        var candidate: Int? = null
        for (num in nums) {
            if (count == 0) {
                candidate = num
                count++
            } else {
                if (num == candidate) {
                    count++
                } else {
                    count--
                }
            }
        }
        return candidate!!
    }
}