1346. Check If N and Its Double Exist

🟩 Easy

Solution

My Solution

func checkIfExist(arr []int) bool {
    m := make(map[int]bool, len(arr))

    for _, num := range arr {
        if _, ok := m[num*2]; ok || (num%2 == 0 && m[num/2]) {
            return true
        }
        m[num] = true
    }

    return false
}

result

Leetcode: link