#include <algorithm>
#include <iostream>
#include "lock.h"
#define OUTP freopen("output.txt","w",stdout)

using namespace std;
string a,b;
int arr[100001];


void AddDigit(int f,int s){
    a+=(char)(f+'0');
    b+=(char)(s+'0');
}

int Question(int p){
    for(int i(0); i < 1500;i++)arr[i] = 0;
    int pnt = 0;
    for(int i(a.size()-1); i>=0;i--){
        int fst = (int)(a[i]-'0');
        int snd = (int)(b[i]-'0');
        arr[pnt]+= (fst+snd);
        if(arr[pnt]>=10){
            arr[pnt+1]++;
            arr[pnt]-=10;
        }
        pnt++;
    }
    int q = arr[p-1];
    return q;
}

void DelDigits(int p){

}