#include <bits/stdc++.h>
int main() {
  int n, m, k, r = 0, t = 0;
  while (scanf("%d%d%d", &n, &m, &k) != EOF) {
    r = m / n;
    t = k / n;
    if (r >= 1 && t >= 1)
      printf("YES\n");
    else
      printf("NO\n");
  }
}
