package main

import (
	"fmt"
	"strings"
)

// fmtCount formats a count with a space as the thousands separator.
func fmtCount(n int64) string {
	s := fmt.Sprintf("%d", n)
	if len(s) <= 3 {
		return s
	}
	var b strings.Builder
	start := len(s) % 3
	if start > 0 {
		b.WriteString(s[:start])
	}
	for i := start; i < len(s); i += 3 {
		if i > 0 {
			b.WriteByte(' ')
		}
		b.WriteString(s[i : i+3])
	}
	return b.String()
}