import std.stdio, std.conv, std.string, std.regex, std.math, std.array, std.algorithm;

void main(){
	auto ip = readln.split;
	int A = ip[0].to!int;
	int B = ip[2].to!int;
	char op = ip[1].to!char;
	if(op == '+'){
		writeln(A + B);
	} else if(op == '-'){
		writeln(A - B);
	}
}