题解 | #高精度整数加法#

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s1,s2;
    while(cin >> s1 >> s2)
    {
        vector<int> res;
        int f=0;
        for(int l1=s1.size()-1,l2=s2.size()-1; l1>=0||l2>=0; l1--,l2--)
        {
            int s = (l1>=0?s1[l1]-'0':0)+(l2>=0?s2[l2]-'0':0)+f;
            res.push_back(s%10);
            f = s/10;
        }
        if(f)res.push_back(1);
        reverse(res.begin(), res.end());
        for(auto i:res)cout << i;
    }
}