#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
template<class S, class T> inline S min_L(S a,T b){
  return a<=b?a:b;
}
template<class S, class T> inline S max_L(S a,T b){
  return a>=b?a:b;
}
inline int my_getchar_unlocked(){
  static char buf[1048576];
  static int s = 1048576;
  static int e = 1048576;
  if(s == e && e == 1048576){
    e = fread_unlocked(buf, 1, 1048576, stdin);
    s = 0;
  }
  if(s == e){
    return EOF;
  }
  return buf[s++];
}
inline void rd(int &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = my_getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = my_getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
struct MY_WRITER{
  char buf[1048576];
  int s;
  int e;
  MY_WRITER(){
    s = 0;
    e = 1048576;
  }
  ~MY_WRITER(){
    if(s){
      fwrite_unlocked(buf, 1, s, stdout);
    }
  }
}
;
MY_WRITER MY_WRITER_VAR;
void my_putchar_unlocked(int a){
  if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){
    fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);
    MY_WRITER_VAR.s = 0;
  }
  MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;
}
inline void wt_L(char a){
  my_putchar_unlocked(a);
}
inline void wt_L(const char c[]){
  int i=0;
  for(i=0;c[i]!='\0';i++){
    my_putchar_unlocked(c[i]);
  }
}
int N;
int X;
int C[100];
int main(){
  int mn;
  int mx;
  rd(N);
  rd(X);
  {
    int Lj4PdHRW;
    for(Lj4PdHRW=(0);Lj4PdHRW<(N);Lj4PdHRW++){
      rd(C[Lj4PdHRW]);
    }
  }
  {
    int e98WHCEY;
    int cTE1_r3A;
    if(N==0){
      cTE1_r3A = 0;
    }
    else{
      cTE1_r3A = C[0];
      for(e98WHCEY=(1);e98WHCEY<(N);e98WHCEY++){
        cTE1_r3A = min_L(cTE1_r3A, C[e98WHCEY]);
      }
    }
    mn =cTE1_r3A;
  }
  {
    int xr20shxY;
    int WYIGIcGE;
    if(N==0){
      WYIGIcGE = 0;
    }
    else{
      WYIGIcGE = C[0];
      for(xr20shxY=(1);xr20shxY<(N);xr20shxY++){
        WYIGIcGE = max_L(WYIGIcGE, C[xr20shxY]);
      }
    }
    mx =WYIGIcGE;
  }
  if(mn<=X && X<=mx){
    wt_L("Yes");
    wt_L('\n');
  }
  else{
    wt_L("No");
    wt_L('\n');
  }
  return 0;
}
// cLay version 20210103-1 [bug fixed 2]

// --- original code ---
// int N, X, C[100];
// {
//   int mn, mx;
//   rd(N,X,C(N));
//   mn = min(C(N));
//   mx = max(C(N));
//   wt(if[mn<=X<=mx, "Yes", "No"]);
// }