abcd.cpp

#include <bits/stdc++.h>
using namespace std;
 

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define endl "\n"
#define ll long long int
#define mp make_pair
#define pq priority_queue
#define ub upper_bound
#define lb lower_bound 
#define um unordered_map
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define pf push_front
#define ppf pop_front
#define loop(i,n) for(ll i=0;i<n;i++)
#define mem1(a) memset(a,-1,sizeof(a))
#define mem0(a) memset(a, 0,sizeof(a))



int main()
{
	int a, b, c;
	cin >>a>>b>>c;
	if(a==b || a==c)
		cout<<"YES"<<endl;
	else if( b==a || b==c)
		cout<<"YES"<<endl;
	else 
		cout<<"NO"<<endl;

	return 0;
}