D. Кодовый замок[!] - Codeforces #3

#include <iostream>
#include <cstdio>
#include <math.h>

using namespace std;
int main() {
    int n; //quantity of the code
    char a[1000]; //given
    char b[1000];
    int count=0;
    int distance[1000];
    cin>>n;
    for (int i=0; i<n; i++) {
        cin>>a[i];
    }
    for (int i=0; i<n; i++) {
        cin>>b[i];
    }
    for (int i=0; i<n; i++) {
        distance[i] = abs(b[i]-a[i]);
        if (distance[i]>5) {
            distance[i]=10-distance[i];
        }
        count = count+distance[i];
    }
    cout<<count<<endl;

    return 0;
}