Problem:
Score : 200 points

Problem Statement

Raccoon is fighting with a monster.

The health of the monster is H.

Raccoon can use N kinds of special moves. Using the i-th move decreases the monster's health by A_i.
There is no other way to decrease the monster's health.

Raccoon wins when the monster's health becomes 0 or below.

If Raccoon can win without using the same move twice or more, print Yes; otherwise, print No.

Constraints

1 \leq H \leq 10^9

1 \leq N \leq 10^5

1 \leq A_i \leq 10^4

All values in input are integers.

Input

Input is given from Standard Input in the following format:

H N
A_1 A_2 ... A_N

Output

If Raccoon can win without using the same move twice or more, print Yes; otherwise, print No.

Sample Input 1

10 3
4 5 6

Sample Output 1

Yes

The monster's health will become 0 or below after, for example, using the second and third moves.

Sample Input 2

20 3
4 5 6

Sample Output 2

No

Sample Input 3

210 5
31 41 59 26 53

Sample Output 3

Yes

Sample Input 4

211 5
31 41 59 26 53

Sample Output 4

No

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

namespace abc153_b
{
    static class Program
    {
        static void Main(string[] args)
        {
            var items = Console.ReadLine().ToIntArray();
            // モンスターの体力
            var h = items[0];
            // アライグマの攻撃の種類
            var n = items[1];
            // 各攻撃の攻撃力
            var a = Console.ReadLine().ToIntArray();

            // 同じ技を2回使わずに勝てるか
            // →すべての攻撃を1回ずつ当てても体力が残っていたらNo

            for (var i = 0; i < a.Length; i++)
            {
                h -= a[i];
                if (h <= 0)
                {
                    break;
                }
            }

            Console.WriteLine($"{(h > 0 ? "No" : "Yes")}");
        }

        static int ToInteger(this string s)
        {
            return int.Parse(s);
        }

        static int[] ToIntArray(this string s, char separator = ' ')
        {
            var items = s.Split(separator);
            var ret = new int[items.Length];
            for (int i = 0; i < items.Length; i++)
            {
                ret[i] = items[i].ToInteger();
            }
            return ret;
        }
    }
}