#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<int> vs(3);
  for (int i = 0; i < 3; i++) cin >> vs[i];
  sort(vs.begin(), vs.end());
  cout << (vs[0] == vs[2] ? "Yes" : "No") << endl;
  return 0;
}
