import std.stdio;
import std.string;
import std.conv;
import std.algorithm;
import std.array;

void main()
{ 
	auto ab = readln().split().to!(int[]);
	int[3] answers;
	answers[0] = ab[0] + ab[1];
	answers[1] = ab[0] - ab[1];
	answers[2] = ab[0] * ab[1];

	answers[0..$].maxElement.writeln;
}
