题解 | #四则运算#

import java.util.*;
import javax.script.*;
public class Main{
    public static void main(String[] args)throws ScriptException{
        Scanner scan = new Scanner(System.in);
        String input = scan.nextLine();
        input = input.replace("[","(");
        input = input.replace("{","(");
        input = input.replace("}",")");
        input = input.replace("]",")");
        ScriptEngine sciptEngine = new ScriptEngineManager().getEngineByName("nashorn");
        System.out.println(sciptEngine.eval(input));
    }
}