题解 | A+B

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

long long func(string s) {
    long long n = 0;
    if (s[0] != '-') {
        for (int i = 0; i < s.size(); i++) {
            if (isdigit(s[i])) {
                n += s[i] - '0';
                n *= 10;
            }
        }
        n /= 10;
    } else {
        for (int i = 1; i < s.size(); i++) {
            if (isdigit(s[i])) {
                n += s[i] - '0';
                n *= 10;
            }
        }
        n /= 10;
        n = -n;
    }
    return n;
}

int main() {
    string s1, s2;
    while (cin >> s1 >> s2) {
        long long n1 = func(s1), n2 = func(s2);
        long long res = n1 + n2;
        cout << res << endl;
    }
}