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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <vector>
#include <queue>
#include <utility>

using namespace std;
typedef long long ll;
const int LEN = 100000;

struct fastio{
  int it,len;
  char s[LEN + 5];
  fastio(){
    it = len = 0;
  }
  char get(){
    if(it < len) return s[it++];
    it = 0, len = fread(s,1,LEN,stdin);
    return len ? s[it++] : EOF;
  }
  bool notend(){
    char c;
    for(c = get();c == ' ' || c == '\n';c = get());
    if(it) it--;
    return c != EOF;
  }
  void put(char c){
    if(it == LEN) fwrite(s,1,LEN,stdout), it = 0;
    s[it++] = c;
  }
  void flush(){
    fwrite(s,1,it,stdout);
  }
}buff,bufo;
inline int getint(){
  char c; int res = 0, sig = 1;
  for(c = buff.get();c < '0' || c > '9';c = buff.get()) if(c == '-') sig = -1;
  for(;c >= '0' && c <= '9';c = buff.get()) res = res * 10 + (c - '0');
  return sig * res;
}
inline ll getll(){
  char c; ll res = 0, sig = 1;
  for(c = buff.get();c < '0' || c > '9';c = buff.get()) if(c == '-') sig = -1;
  for(;c >= '0' && c <= '9';c = buff.get()) res = res * 10 + (c - '0');
  return sig * res;
}
inline void putint(int x,char suf){
  if(!x) bufo.put('0');
  else{
    if(x < 0) bufo.put('-'), x = -x;
    int k = 0; char s[15];
    while(x){
      s[++k] = x % 10 + '0';
      x /= 10;
    }
    for(;k;k--) bufo.put(s[k]);
  }
  bufo.put(suf);
}
inline void putll(ll x,char suf){
  if(!x) bufo.put('0');
  else{
    if(x < 0) bufo.put('-'), x = -x;
    int k = 0; char s[25];
    while(x){
      s[++k] = x % 10 + '0';
      x /= 10;
    }
    for(;k;k--) bufo.put(s[k]);
  }
  bufo.put(suf);
}
inline char get_char(){
  char c;
  for(c = buff.get();c == ' ' || c == '\n';c = buff.get());
  return c;
}

int main(){
  int h = getint(), n = getint();
  for(int i = 1;i <= n;i++) h -= getint();
  if(h <= 0) puts("Yes");
  else puts("No");
  return 0;
}