solve

//разкоментирайте закоментираното долу, и махнете биг интиджърите, с които се боря....
и минават 9/10

package com.company;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.util.Stack;

public class Solve {
    public static void main(String[] args) throws IOException {
        testInput();

        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String problem = in.readLine();
        problem = problem.replaceAll(" ", "");

        Stack<Integer> integers = new Stack<>();
        Stack<Character> signs = new Stack<>();

        String number;
        char sign;
        int i = 0;

        while (problem.contains("*") || problem.contains("+") || problem.contains("-")) {
            if (problem.charAt(i) == '(') {
                number = problem.substring(0, i - 1);
                sign = problem.substring(i - 1, i).charAt(0);
                integers.push(Integer.parseInt(number));
                signs.push(sign);

                problem = problem.substring(i + 1, problem.length() - 1);
                i = 0;
            } else {
                i++;
            }

            if (!problem.endsWith(")")) {
                for (int j = 0; j < problem.length(); j++) {
                    if (problem.charAt(j) == '+' || problem.charAt(j) == '-' || problem.charAt(j) == '*') {
                        number = problem.substring(0, j);
                        sign = problem.substring(j, j + 1).charAt(0);
                        integers.push(Integer.parseInt(number));
                        signs.push(sign);

                        problem = problem.substring(j + 1, problem.length());
                    }
                }
            }
        }

        BigInteger finalSum = new BigInteger(problem);
        int rotations = integers.size();

        for (int j = 0; j < rotations; j++) {
            if (signs.peek() == '+') {
                finalSum.add(BigInteger.valueOf(integers.pop()));
//                finalSum += integers.pop();
                signs.pop();
            } else if (signs.peek() == '*') {
                finalSum.multiply(BigInteger.valueOf(integers.pop()));
//                finalSum *= integers.pop();
                signs.pop();
            } else if (signs.peek() == '-') {
                finalSum =  BigInteger.valueOf(integers.pop()).subtract(finalSum);
//                finalSum = integers.pop() - finalSum;
                signs.pop();
            }
        }

        System.out.println(finalSum);
    }

    private static void testInput() {
        String test = "12*(35-(46*(5+15)))";
        System.setIn(new ByteArrayInputStream(test.getBytes()));
    }
}