import std.algorithm, std.array, std.container, std.range, std.bitmanip;
import std.numeric, std.math, std.bigint, std.random, core.bitop;
import std.string, std.regex, std.conv, std.stdio, std.typecons;

void main()
{
  auto s = readln.chomp;
  auto m = s.match(r"([-+]?\d+)([-+])([-+]?\d+)").captures;
  auto x1 = m[1].to!int, op = m[2], x2 = m[3].to!int;
  if (op == "+")
    writeln(x1 - x2);
  else
    writeln(x1 + x2);
}