AtCoder Beginner Contest 395

A問題

package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

func main() {
	var n int

	fmt.Scan(&n)

	reader := bufio.NewReaderSize(os.Stdin, 1<<20)
	line, _ := reader.ReadString('\n')
	line = strings.TrimSpace(line)
	parts := strings.Split(line, " ")

	nums := make([]int, n)
	for i := 0; i < n; i++ {
		fmt.Sscanf(parts[i], "%d", &nums[i])
	}

	for i := 1; i < n; i++ {

		if nums[i-1] >= nums[i] {
			fmt.Println("No")
			return
		}
	}
	fmt.Println("Yes")

}