[백준] 1541 잃어버린 괄호

import java.util.Arrays;

public class Brackets {

    int writeBrackets(String input) {
        int result = 0;

        String[] splited = input.split("-");

        for (int i = 0; i < splited.length; i++) {
            int sum = Arrays.stream(splited[i].split("\\+")).mapToInt(Integer::parseInt).sum();

            if (i > 0) {
                sum *= -1;
            }

            result += sum;
        }

        return result;
    }
}