import std;

alias sread = () => readln.chomp();
alias lread = () => readln.chomp.to!long();
alias aryread(T = long) = () => readln.split.to!(T[]);

void main()
{
    long a, b;
    char op;
    scan(a, op, b);
    // writeln(a);
    // writeln(op);
    // writeln(b);
    if (op == '+')
    {
        writeln(a + b);
    }
    else
    {
        writeln(a - b);
    }

}

void scan(L...)(ref L A)
{
    auto l = readln.split;
    foreach (i, T; L)
    {
        A[i] = l[i].to!T;
    }
}
