#line 1 "Main.cpp"
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <atcoder/modint>
#include <atcoder/string>
#include <atcoder/dsu>
#line 5 "nachia\\array\\csr-array.hpp"

namespace nachia{

template<class Elem>
class CsrArray{
public:
    struct ListRange{
        using iterator = typename std::vector<Elem>::iterator;
        iterator begi, endi;
        iterator begin() const { return begi; }
        iterator end() const { return endi; }
        int size() const { return (int)std::distance(begi, endi); }
        Elem& operator[](int i) const { return begi[i]; }
    };
    struct ConstListRange{
        using iterator = typename std::vector<Elem>::const_iterator;
        iterator begi, endi;
        iterator begin() const { return begi; }
        iterator end() const { return endi; }
        int size() const { return (int)std::distance(begi, endi); }
        const Elem& operator[](int i) const { return begi[i]; }
    };
private:
    int m_n;
    std::vector<Elem> m_list;
    std::vector<int> m_pos;
public:
    CsrArray() : m_n(0), m_list(), m_pos() {}
    static CsrArray Construct(int n, std::vector<std::pair<int, Elem>> items){
        CsrArray res;
        res.m_n = n;
        std::vector<int> buf(n+1, 0);
        for(auto& [u,v] : items){ ++buf[u]; }
        for(int i=1; i<=n; i++) buf[i] += buf[i-1];
        res.m_list.resize(buf[n]);
        for(int i=(int)items.size()-1; i>=0; i--){
            res.m_list[--buf[items[i].first]] = std::move(items[i].second);
        }
        res.m_pos = std::move(buf);
        return res;
    }
    static CsrArray FromRaw(std::vector<Elem> list, std::vector<int> pos){
        CsrArray res;
        res.m_n = pos.size() - 1;
        res.m_list = std::move(list);
        res.m_pos = std::move(pos);
        return res;
    }
    ListRange operator[](int u) { return ListRange{ m_list.begin() + m_pos[u], m_list.begin() + m_pos[u+1] }; }
    ConstListRange operator[](int u) const { return ConstListRange{ m_list.begin() + m_pos[u], m_list.begin() + m_pos[u+1] }; }
    int size() const { return m_n; }
    int fullSize() const { return (int)m_list.size(); }
};

} // namespace nachia
#line 1 "nachia\\misc\\bit-operations.hpp"

#line 4 "nachia\\misc\\bit-operations.hpp"


namespace nachia{

    int Popcount(unsigned long long c) noexcept {
    #ifdef __GNUC__
        return __builtin_popcountll(c);
    #else
        c = (c & (~0ull/3)) + ((c >> 1) & (~0ull/3));
        c = (c & (~0ull/5)) + ((c >> 2) & (~0ull/5));
        c = (c & (~0ull/17)) + ((c >> 4) & (~0ull/17));
        c = (c * (~0ull/257)) >> 56;
        return c;
    #endif
    }

    // please ensure x != 0
    int MsbIndex(unsigned long long x) noexcept {
    #ifdef __GNUC__
        return 63 - __builtin_clzll(x);
    #else
        int res = 0;
        for(int d=32; d>=0; d>>=1) if(x >> d){ res |= d; x >>= d; }
        return res;
    #endif
    }

    // please ensure x != 0
    int LsbIndex(unsigned long long x) noexcept {
    #ifdef __GNUC__
        return __builtin_ctzll(x);
    #else
        return msb_idx(x & -x);
    #endif
    }

}

#line 11 "Main.cpp"

using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
const i64 INF = 1001001001001001001;

using Modint = atcoder::static_modint<998244353>;

struct DecrementalNeighborQuery{
    int n;
    int b;
    std::vector<unsigned long long> X;
    atcoder::dsu Y;
    std::vector<int> dsuTrans;
    DecrementalNeighborQuery(int _n)
        : n(_n+1), b(n/64+1), X(b, ~0ull), Y(b), dsuTrans(b)
    {
        for(int i=0; i<b; i++) dsuTrans[i] = i;
    }
    int smallQ(int c, int d) const noexcept {
        auto z = X[c] & ((~0ull) << d);
        return z ? c*64 + nachia::LsbIndex(z) : -1;
    }
    int largeQ(int c) noexcept { return dsuTrans[Y.leader(c)]; }
    void dec(int i){
        i++;
        int c = i/64, d = i%64;
        X[c] &= ~(1ull << d);
        if(X[c] == 0){
            int h = largeQ(c+1);
            dsuTrans[Y.merge(c, c+1)] = h;
        }
    }
    int queryRight(int i){
        i++;
        int c = i/64, d = i%64;
        int x = smallQ(c, d);
        if(x >= 0) return x-1;
        c = largeQ(c); d = 0;
        return smallQ(c, d)-1;
    }
};



int main(){
    string S; cin >> S;
    auto Z = atcoder::z_algorithm(S);
    int n = S.size();
    vector<pair<int,int>> pairs(n);
    rep(i,n) pairs[i] = { Z[i], i };
    auto csr = nachia::CsrArray<int>::Construct(n+1, pairs);

    auto Q = DecrementalNeighborQuery(n);
    
    vector<int> dp(n+1);
    rep(i,n+1) dp[i] = i;

    for(int x=1; x<=n; x++){
        for(int c : csr[x-1]){
            Q.dec(c);
        }
        dp[x] = min(dp[x], dp[x-1] + 1);
        int p = x, t = dp[x] + 1;
        while(p < n){
            int nx = Q.queryRight(p);
            if(nx >= n) break;
            t += nx - p + 1;
            p = nx + x;
            dp[p] = min(dp[p], t);
        }
    }

    cout << dp[n] << '\n';
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} ios_do_not_sync_instance;