3300. Minimum Element After Replacement With Digit Sum

You are given an integer array nums.

You replace each element in nums with the sum of its digits.

Return the minimum element in nums after all replacements.

package main

import "math"

func helper(x int) int {
	res := 0
	for x > 0 {
		res += x % 10
		x /= 10
	}
	return res
}

func minElement(nums []int) int {
	res := math.MaxInt64
	for _, n := range nums {
		res = min(res, helper(n))
	}
	return res
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}