golang max duplicate element

main.go

package main

import "fmt"

// MaxDup input a random slice and return max duplicate element and lenght
func MaxDup(a []int) (int, int) {
	maxV := 0
	max := 0
	b := make(map[int]int)

	for i := 0; i < len(a); i++ {
		b[a[i]]++

		if b[a[i]] > max {
			max = b[a[i]]
			maxV = a[i]
		}
	}

	return maxV, max
}

func main() {
  // output: 3 4
	fmt.Println(MaxDup([]int{1, 3, 2, 4, 1, 4, 2, 32, 45, 3, 55, 3, 4, 5, 2, 3}))
}