open System
open System.Collections.Generic


let ReadOne T = stdin.ReadLine()|> T
let ReadSplit T = stdin.ReadLine().Split()|>Array.map T
let Mod = (1e9|>int64)+7L
[<EntryPoint>]
let main argv =
    let p =stdin.ReadLine().Split()
    let a,b =int p.[0],int p.[2]
    if p.[1]="+" then (a+b) else (a-b)
    |>stdout.WriteLine
    0
