AcWing 794. 高精度除法

#include<bits/stdc++.h>

using namespace std;

vector<int> div(vector<int> A, int b, int &r) {
    vector<int> res;
    for (int i = 0; i < A.size(); i++) {
        r = r * 10 + A[i];
        res.push_back(r / b);
        r %= b;
    }
    reverse(res.begin(), res.end());
    while (res.size() > 1 && res.back() == 0)res.pop_back();
    return res;
}

int main() {
    vector<int> A;
    int b;
    string a;
    cin >> a >> b;
    for (int i = 0; i < a.size(); i++)A.push_back(a[i] - '0');

    int r = 0;
    vector<int> res = div(A, b, r);
    for (int i = res.size() - 1; i >= 0; i--)cout << res[i];
    cout << endl;
    cout << r;

    return 0;
}