#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>
#include <set>
#include <cstdio>
#include <string>

using namespace std;

int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  cout << (a <= b && a <= c ? "Yes" : "No") << endl;
  return 0;
}