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 ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            bool ret = false;
            int retint = 0;
            string retstr = string.Empty;
            var ins = Console.ReadLine().Split(' ');
            var num = ins.Select(x => c2i(x)).ToList();

            var ins2 = Console.ReadLine().Split(' ');
            var numwaza = ins2.Select(x => c2i(x)).ToList();
            var HP = num[0];
            var wazasuu = num[1];

            var sumAtack = 0;
            foreach (var at in numwaza)
            {
                sumAtack += at;
            }
            retstr = (sumAtack >= HP) ? "Yes" : "No";

            Console.WriteLine(retstr);
            //Console.ReadLine();
        }
            
        static int c2i(string c) { return int.Parse(c); }
    }
}