题解 | A+B

#include <iostream>
#include <string>

using namespace std;

int string_to_int(const string &a)
{
    int x = 0;
    int n = a.length();
    if(a[0] == '-')
    {
        for(int i = 1; i < n; i++)
        {
            if(a[i] != ',') x = x * 10 - (a[i] - '0');
        }
    }
    else 
    {
        for(int i = 0; i < n; i++)
        {
            if(a[i] != ',') x = x * 10 + (a[i] - '0');
        }
    }
    return x;
}

int main() 
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    string a, b;
    while(cin >> a >> b)
    {
        int aint = string_to_int(a);
        int bint = string_to_int(b);
        cout << aint + bint << "\n";
    }
    return 0;
}