package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func nextInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}
func nextStr() string {
	sc.Scan()
	return sc.Text()
}
func get(n int) []string {
	inputs :=
		make([]string, n)
	for index := range inputs {
		inputs[index] = nextStr()
	}
	return inputs
}
func main() {
	sc.Split(bufio.ScanWords)
	n := nextInt()
	etos := get(n)
	m := make(map[string]int)
	for _, eto := range etos {
		m[eto]++
	}
	for _, count := range m {
		if count == n || count > n/2+1 {
			fmt.Println("NO")
			return
		}
	}
	fmt.Println("YES")
}