aproape_eu

#include <bits/stdc++.h>

using namespace std;
ifstream fin("aproape.in");
ofstream fout("aproape.out");
string s;
int cer, nrap, nrap3;
int main()
{
    ios_base::sync_with_stdio(false);
    fin.tie(nullptr);
    fin>>cer>>s;
    if(cer==1)
    {
        fout<<s.size();
        return 0;
    }
    if(cer==2)
    {
        if(s=="1")
        {
            fout<<2;
            return 0;
        }
        int rez=0;
        if (s[0]<='1' || s[0]=='9')
            rez++;
        else
            rez +=2;

        for(size_t i=1; i<s.size(); i++)
            if(s[i]=='0' || s[i]=='9')
                rez++;
            else
                rez += 2;
        fout<<rez;
        return 0;
    }
    if(s == "1")
    {
        fout<<2;
        return 0;
    }
    if(s == "2")
    {
        fout<<3;
        return 0;
    }
    int rez=1;
    if(s.front()<='2' || s.front()>='8')
        rez++;
    else
        rez += 2;
    for(size_t i=1; i<s.size(); ++i)
        if(s[i]>='2' && s[i]<= '7')
            rez+= 2;
        else
            rez++;
    int pr=0;
    if(s.front()<='1' || s.front()=='9')
        pr=1;
    else
        pr=2;
    for(size_t i = 1; i < s.size(); i++)
    {
        int atc=0;
        if(s[i]>='1' && s[i]<='8')
            atc=2;
        else
            atc=1;
        rez=(rez+1ll*pr*atc);
        pr+=atc;
    }
    fout<<rez;
    return 0;
}