import std;
import core.bitop;
import core.checkedint;
import core.time;

void main() {
	int i, j, k;
	readf("%d %d %d\n", i, j, k);
	writeln(yes(i <= j && i <= k));
}

pragma(inline)
string yes(const bool b) pure @nogc nothrow @safe {
	return b ? "Yes" : "No";
}