#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unrolled-loops")
using namespace std;
const int mod = 1e9 + 7;
int test = 1;
void nathan_on_osu() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
}
int n, m, k;
int main() {
  nathan_on_osu();
  cin >> n >> m >> k;
  if (n <= m && n <= k)
    cout << "Yes";
  else
    cout << "No";
}
