题解

又来发题解了：升级版

#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <stdlib.h>
using std::cout;
using std::cin;
using std::vector;
using std::string;
using std::ios;
class Father
{
    public:
    private:
};
class IO : 
public Father
{
    public:
    template<typename T>
    T read()
    {
        T IN;
        cin>>IN;
        return IN;
    }
    template<typename ...T>
    void write(T...args)
    {
        (cout<<...<<args);
    }
    template<typename ...T>
    void writeln(T...args)
    {
        write(args...,"\n");
    }
};
class AB : 
public Father
{
    private:
    string A,B;
    IO * io = new IO();
    vector<int> add
    (
        const vector<int>& a, 
                    const vector<int>& b
                   ) {
        vector<int> res;
        int carry = 0;
        int i = 0;
        while 
            (
            i < a.size() ||
               i < b.size() ||
               carry > 0
            ) {
            int sum;
            sum = carry;
            if 
                (
                i < a.size()
                ) 
                sum += a[i];
            if 
                (
                i < b.size()
                ) 
                sum += b[i];
            res.push_back(sum % 10);
            carry = sum / 10;
            i++;
        }
        return res;
    }
    vector<int> stb(
        const string& s
    ) {
        vector<int> res;
        for (
            int i = s.size() - 1;
            i >= 0;
            i--
            ) {
            res.push_back((s[i] - '0'));
        }
        return res;
    }
    public:
    AB(
        bool YES_RUN_GO,
       int argc,
       const char* argv[]
    ){
        if(
            YES_RUN_GO
        ){
            this->A=io->read<string>(),this->B=io->read<string>();
        }
    }
    void __init__(
        bool YES_INIT_GO
    ){
        if(
            YES_INIT_GO
        ){
            vector<int> a = 
            this->stb(
                this->A
            );
            vector<int> b = 
            this->stb(
                this->B
            );
            vector<int> c = 
            this->add(
                a
                ,
                b
            )
            ;
            for(
                int i = c.size()-1;
                i>=0;
                i--
                ){
                io->write(
                    int(c[i])
                );
            }
            io->writeln();
        }
    }
    
};
static bool AB_PROBLEM_YES=true;
int main(int argc,
         const char* argv[]
        ){
    ios::sync_with_stdio(0);
    cin.tie(0);
    AB * ab = new AB(AB_PROBLEM_YES,
                    argc,
                    argv);
    ab->__init__(AB_PROBLEM_YES);
    delete ab;
}