백준 1541번(Java)

import java.io.*;
import java.util.*;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		int sum = Integer.MAX_VALUE;
		StringTokenizer sub = new StringTokenizer(br.readLine(), "-");

		while (sub.hasMoreTokens()) {
			int temp = 0;

			StringTokenizer add = new StringTokenizer(sub.nextToken(), "+");

			while (add.hasMoreTokens()) {
				temp += Integer.parseInt(add.nextToken());
			}

			if (sum == Integer.MAX_VALUE) {
				sum = temp;
			} else {
				sum -= temp;
			}
		}
		System.out.println(sum);
	}
}