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.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Contest_01_Valeo_P2
{
    class Program
    {
        static void Main(string[] args)
        {
            //while (true)
            {
                //Console.WriteLine("start problem");
                string input = Console.ReadLine();
                int h = int.Parse(input.Split(' ')[0]);
                int n = int.Parse(input.Split(' ')[1]);
                input = Console.ReadLine();
                string[] a_string = input.Split(' ');
                List<int> a = new List<int>();
                a_string.ToList().ForEach(x => a.Add(int.Parse(x)));
                bool result = canWin(h, n, a);
                Console.WriteLine(result ? "Yes" : "No");
                //Console.Write("press y to exit : ");
                //if (Console.ReadLine() == "y")
                //    return;
            }
        }

        private static bool canWin(int h, int n, List<int> a)
        {
            int health = h;
            for (int i = 0; i < n; i++)
            {
                health -= a[i];
                if (health <= 0)
                    return true;
            }
            if (health <= 0)
                return true;
            return false;
        }
    }
}