没人用高精度么？

没人用高精度么？我来！

#include <iostream>
#include <vector>
using namespace std;
vector<int> multiply(vector<int>& num1, int num2) {
    vector<int> result;
    int carry = 0;

    for (int i=num1.size()-1; i>=0; i--) {
        int prod = num1[i] * num2 + carry;
        result.insert(result.begin(), prod%10);
        carry = prod / 10;
    }

    while (carry > 0) {
        result.insert(result.begin(), carry % 10);
        carry = carry / 10;
    }

    return result;
}

int main() {
    string strNum;
    cin >> strNum;

    vector<int> num;
    for (char c : strNum) {
        num.push_back(c - '0');
    }

    vector<int> result = multiply(num, 114514);
    for (int digit : result) {
        cout << digit;
    }

    return 0;
}