1541번 - 파싱 이용

[illuminoplanet]

#include <bits/stdc++.h>
#define endl '\n'
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

int main(void)
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    string s; cin >> s;
    int n = s.size();

    vector<int> number;
    int minus = 0;
    for (int i = 0; i < n; i++)
    {
        if (isdigit(s[i]))
        {
            int j = i;
            while (j+1 < n && isdigit(s[j+1])) j++;
            int parsed = stoi(s.substr(i, j-i+1));
            number.push_back(parsed);
            i = j;
        }
        if (!minus && s[i] == '-') minus = number.size();
    }

    if (!minus) minus = number.size();

    int result = accumulate(number.begin(), number.begin()+minus, 0)-accumulate(number.begin()+minus, number.end(), 0);
    cout << result << endl;
    return 0;
}