#include <iostream>
using  namespace std;
int main() 
{
    int a,b,c;
    cin >> a >> b >> c;
    if (a == b)
    {
        cout << "YES";
    }
    else
    {
        if (a == c)
        {
            cout << "YES";
        }
        else
        {
            cout << "NO";
        }
    }
    return 0;
}