#include <bits/stdc++.h>
using namespace std;
int main() {
  int a[3];
  cin >> a[1];
  cin >> a[2];
  cin >> a[3];
  sort(a, a + 3);
  if (a == a + 3) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
