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;
using System.Linq;
using System.Collections.Generic;

namespace AtCoder2020Ned
{
    class Program
    {
        static void Main(string[] args)
        {
            var inputs = Console.ReadLine().Split(' ');
            var monster = new Monster(int.Parse(inputs[0]));
            var ultimate = Console.ReadLine().Split(' ');
            var ultimateAtk = new int[ultimate.Length];

            foreach (var item in ultimate.Select((atk, index) => new { Atk = atk, Index = index }))
            {
                ultimateAtk[item.Index] = int.Parse(item.Atk);
            }

            var raccoon = new Raccoon(int.Parse(inputs[1]), ultimateAtk);
            var result = CanRaccoonBeat(raccoon, monster);

            Console.WriteLine(result ? "Yes" : "No");
            Console.Read();
        }

        static bool CanRaccoonBeat(Raccoon raccoon, Monster monster)
        {
            var maxRaccoonAtk = 0;
            foreach (var item in raccoon.Ultimate)
            {
                maxRaccoonAtk += item;
            }

            if (maxRaccoonAtk >= monster.HP)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    }

    class Raccoon
    {
        public int HP { get; set; } = 0;
        public int[] Ultimate { get; set; }

        private Raccoon()
        {

        }

        public Raccoon(int hp, int[] ultimate) : base()
        {
            HP = hp;
            Ultimate = ultimate;
        }
    }

    class Monster
    {
        public int HP { get; set; } = 0;

        private Monster()
        {

        }

        public Monster(int hp) : base()
        {
            this.HP = hp;
        }
    }
}