/** gnu specific **/
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
/** contains everything I need in std **/
#include <bits/stdc++.h>

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(S) ((int)S.size())
#define FOR(i, st_, n) for(int i = st_; i < n; ++i)
#define RFOR(i, n, end_) for(int i = (n)-1; i >= end_; --i)
#define x first
#define y second
#define pb push_back
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef unsigned long long ull;
typedef long double LD;
typedef pair<ull, ull> pull;
using namespace __gnu_pbds;
typedef tree<ll, null_type, less<>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
using namespace std;
#ifdef ONPC
mt19937 rnd(228);
#else
mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
#endif

#define MAX_N 100010
vector<int> ones={1,11,111,1111,11111};


vector<int> divs[MAX_N];
int dp[MAX_N];

int solve()
{
	int N;
	if(!(cin>>N))
		return 1;
	dp[0]=0,dp[1]=1;
	FOR(num,2,N+1)
	{
		int res=1e4;
		FOR(i,0,sz(ones))
		{
			if(num-ones[i] >= 0)
				res=min(res,i+1+dp[num-ones[i]]);
		}
		for(auto d:divs[num])
		{
			if(d!=1 && num/d!=1)
				res=min(res, dp[d]+dp[num/d]);
		}
		auto s = to_string(num);
		FOR(i,1,sz(s))
		{
			int s1 = stoi(s.substr(0,i));
			int s2 = stoi(s.substr(i));
			if(to_string(s1)+to_string(s2)==s && s2!=0)
			{
				res=min(res,dp[s1] + dp[s2]);
			}
		}
		dp[num]=res;
	}
	cout << dp[N] <<"\n";
    return 0;
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int TET = 1e9;
    FOR(i,1,MAX_N)
	{
		for(int j = i; j < MAX_N; j+=i)
		{
			divs[j].pb(i);
		}
	}
    //cin >> TET;
    for (int i = 1; i <= TET; i++)
    {
        if (solve())
        {
            break;
        }
#ifdef ONPC
        cout << "__________________________" << endl;
#endif
    }
#ifdef ONPC
    cerr << endl << "finished in " << clock() * 1.0 / CLOCKS_PER_SEC << " sec" << endl;
#endif
}