/*I MAY NOT GET THE SUCCESS IMMEDIATELY BUT I WILL GET IT FOR SURE*/
#include<bits/stdc++.h>
#define opt std::ios_base::sync_with_stdio(false)
#define I int
#define li		int32_t
#define lli		long long
#define ulli unsigned long long
 
#define pn			printf("\n")
#define nl			cout<<'\n'
#define sf(N)       scanf("%lld",&N)
#define pf(N)       printf("%lld",N)
#define sl          cout<<' '
#define ps          printf(" ")
 
#define rep(i,a,b)	for(i=a;i<b;i++)
#define repr(i,a,b)	for(i=a;i>b;i--)
#define elif		else if
#define mset(a,b)	memset(a,b,sizeof(a))
 
#define pb		push_back
#define pob		pop_back
#define itr		iterator
#define sz()	size()
#define szof    sizeof
#define lb		lower_bound
#define ub		upper_bound
#define mp		make_pair
#define vlli    vector<lli>
#define plli	pair<lli,lli>
#define vplli	vector<plli >
#define F   	first
#define S		second
#define Dup erase(unique(V.begin(),V.end()),V.end())
 
#define Inf     1000000000000000
#define mod		1000000007
using namespace std;
 
lli Power(lli a,lli b)
{
    lli result=1;
 
    while(b)
    {
        if(b%2)
        {
            result=(result*a)%mod;
        }
 
        b=b>>1;
        a=(a*a)%mod;
    }
 
 return result;
}
 
int main()
{
    opt;
 
    /*#ifndef ONLINE_JUDGE
    freopen("double_squares.txt","r",stdin);
    freopen("double_squares_out.txt","w",stdout);
    #endif // ONLINE_JUDGE*/
    
    lli a,b,c,d;
    cin>>a>>b>>c>>d;
    
    if(min(c,d)>=max(a,b))
    {
        cout<<"YES";
    }
    else
    {
        cout<<"NO";
    }
    
    
    
    
    
    
 
 return 0;
}