Minimum Moves

minimum-moves.cc

#include <iostream>

using namespace std;

int diff = 0;

// C++ get each digit in integer
// https://stackoverflow.com/a/4615187/3513266
void calc_each_moves(int a, int m) {
    // the variable `a` is used as a reference.
    if (a >= 10)
        calc_each_moves(a / 10, m / 10);

    int ai = a % 10;
    int mi = m % 10;

    diff += abs(ai - mi);
}

int main() {
    int an, mn;

    // inputs for Andrea's array.
    cin >> an;
    int a[an];
    for (int i = 0; i < an; i++) {
        cin >> a[i];
    }

    // inputs for Maria's array.
    cin >> mn;
    int m[mn];
    for (int i = 0; i < mn; i++) {
        cin >> m[i];
    }

    // calculate the each moves.
    for (int i = 0; i < an; i++) {
        calc_each_moves(a[i], m[i]);
    }

    // print the whole moves.
    cout << diff << endl;

    return 0;
}