백준 소스코드 [C++] 1541 잃어버린 괄호

www.acmicpc.net/problem/1541

1541번: 잃어버린 괄호

백준 소스코드 [C++] 1541 잃어버린 괄호

#include <iostream>
#include <algorithm>
#include <queue>
#include <string.h>
#include <limits.h>
#include <vector>
#include <math.h>
#include <stack>
#include <bitset>
#include <string>
#define all(v) v.begin(), v.end()
#define pii pair<int,int>
typedef long long ll;
using namespace std;
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	string s;
	cin >> s;
	int state = 1;
	int sub = 0;
	int sum = 0;
	for (int i = 0;i < s.size();i++) {
		if ('0' <= s[i] && s[i] <= '9') sub = sub * 10 + (s[i] - '0');
		else {
			sum = sum + state * sub;
			sub = 0;
			if (s[i] == '-') state = -1;
		}
	}
	sum = sum + state * sub;
	cout << sum;
	return 0;
}