#include <bits/stdc++.h> 
using namespace std;
int main()
{
    int a,b,c;
    cin >> a >> b >> c;
    if (a == b)
    {
        cout << "YES" << endl;
    }
    else if (a == c)
    {
        cout << "YES" << endl; 
    }
    else if (b == c)
    {
        cout << "YES" << endl;
    }
    else
    {
        cout << "NO" << endl;
    }
    return 0;
}