import std.stdio, std.string, std.conv;

void main() {
	auto input = getStdin!(string[])()[0];
	int[] num = input.split(" ").to!(int[]);
	if (num[0] < num[1]) {
		if (num[1] < num[2]) {
			"Yes".writeln;
			return;
		}
	}
	"No".writeln;
}

T getStdin(T)() {
    string[] cmd;
    string line;
    while ((line = chomp(stdin.readln())) != "") cmd ~= line;
    return to!(T)(cmd);
}