class Solution {
public:
    vector<int> addToArrayForm(vector<int>& num, int k) {
        vector<int>a;
        reverse(num.begin(),num.end());
        while(k)
        {
            a.push_back(k%10);
            k/=10;
        }
        vector<int>c;
        int t=0;//进位
        for(int i=0;i<num.size() || i<a.size();i++) 
        {
            if(i<num.size()) t+=num[i];
            if(i<a.size()) t+=a[i];
            c.push_back(t%10);
            t/=10;

        }
        if(t) c.push_back(1);
        reverse(c.begin(),c.end());
        return c;
    }
};