# require "debug"
alias LL = Int64
macro chmin(x, y); {{x}} = {{y}} if {{x}} > {{y}}; end
macro chmax(x, y); {{x}} = {{y}} if {{x}} < {{y}}; end
macro yn(x); {{x}} ? "Yes" : "No"; end

# ---------------------------------------------------- :)

i, j, k = read_line.split.map(&.to_i)
puts yn(i<=j && i<=k)