#line 1 "library/Template/template.hpp"
#include <bits/stdc++.h>
using namespace std;

#define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define ALL(v) (v).begin(),(v).end()
using ll=long long int;
const int inf = 0x3fffffff;
const ll INF = 0x1fffffffffffffff;
template<typename T>inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<typename T>inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
#line 2 "library/Utility/fastio.hpp"
#include <unistd.h>

class FastIO{
    static constexpr int L=1<<16;
    char rdbuf[L];
    int rdLeft=0,rdRight=0;
    inline void reload(){
        int len=rdRight-rdLeft;
        memmove(rdbuf,rdbuf+rdLeft,len);
        rdLeft=0,rdRight=len;
        rdRight+=fread(rdbuf+len,1,L-len,stdin);
    }
    inline bool skip(){
        for(;;){
            while(rdLeft!=rdRight and rdbuf[rdLeft]<=' ')rdLeft++;
            if(rdLeft==rdRight){
                reload();
                if(rdLeft==rdRight)return false;
            }
            else break;
        }
        return true;
    }
    template<typename T,enable_if_t<is_integral<T>::value,int> =0>inline bool _read(T& x){
        if(!skip())return false;
        if(rdLeft+20>=rdRight)reload();
        bool neg=false;
        if(rdbuf[rdLeft]=='-'){
            neg=true;
            rdLeft++;
        }
        x=0;
        while(rdbuf[rdLeft]>='0' and rdLeft<rdRight){
            x=x*10+(neg?-(rdbuf[rdLeft++]^48):(rdbuf[rdLeft++]^48));
        }
        return true;
    }
    template<typename T,enable_if_t<is_floating_point<T>::value,int> =0>inline bool _read(T& x){
        if(!skip())return false;
        if(rdLeft+20>=rdRight)reload();
        bool neg=false;
        if(rdbuf[rdLeft]=='-'){
            neg=true;
            rdLeft++;
        }
        x=0;
        while(rdbuf[rdLeft]>='0' and rdbuf[rdLeft]<='9' and rdLeft<rdRight){
            x=x*10+(rdbuf[rdLeft++]^48);
        }
        if(rdbuf[rdLeft]!='.')return true;
        rdLeft++;
        T base=.1;
        while(rdbuf[rdLeft]>='0' and rdbuf[rdLeft]<='9' and rdLeft<rdRight){
            x+=base*(rdbuf[rdLeft++]^48);
            base*=.1;
        }
        if(neg)x=-x;
        return true;
    }
    inline bool _read(char& x){
        if(!skip())return false;
        if(rdLeft+1>=rdRight)reload();
        x=rdbuf[rdLeft++];
        return true;
    }
    inline bool _read(string& x){
        if(!skip())return false;
        for(;;){
            int pos=rdLeft;
            while(pos<rdRight and rdbuf[pos]>' ')pos++;
            x.append(rdbuf+rdLeft,pos-rdLeft);
            if(rdLeft==pos)break;
            rdLeft=pos;
            if(rdLeft==rdRight)reload();
            else break;
        }
        return true;
    }
    template<typename T>inline bool _read(vector<T>& v){
        for(auto& x:v){
            if(!_read(x))return false;
        }
        return true;
    }

    char wtbuf[L],tmp[50];
    int wtRight=0;
    inline void flush(){
        fwrite(wtbuf,1,wtRight,stdout);
        wtRight=0;
    }
    inline void _write(const char& x){
        if(wtRight>L-32)flush();
        wtbuf[wtRight++]=x;
    }
    inline void _write(const string& x){
        for(auto& c:x)_write(c);
    }
    template<typename T,enable_if_t<is_integral<T>::value,int> =0>inline void _write(T x){
        if(wtRight>L-32)flush();
        if(x==0){
            _write('0');
            return;
        }
        else if(x<0){
            _write('-');
            if (__builtin_expect(x == std::numeric_limits<T>::min(), 0)) {
                switch (sizeof(x)) {
                case 2: _write("32768"); return;
                case 4: _write("2147483648"); return;
                case 8: _write("9223372036854775808"); return;
                }
            }
            x=-x;
        }
        int pos=0;
        while(x!=0){
            tmp[pos++]=char((x%10)|48);
            x/=10;
        }
        rep(i,0,pos)wtbuf[wtRight+i]=tmp[pos-1-i];
        wtRight+=pos;
    }
    template<typename T>inline void _write(const vector<T>& v){
        rep(i,0,v.size()){
            if(i)_write(' ');
            _write(v[i]);
        }
    }
public:
    FastIO(){}
    ~FastIO(){flush();}
    inline void read(){}
    template <typename Head, typename... Tail>inline void read(Head& head,Tail&... tail){
        assert(_read(head));
        read(tail...); 
    }
    template<bool ln=true,bool space=false>inline void write(){if(ln)_write('\n');}
    template <bool ln=true,bool space=false,typename Head, typename... Tail>inline void write(const Head& head,const Tail&... tail){
        if(space)_write(' ');
        _write(head);
        write<ln,true>(tail...); 
    }
};

/**
 * @brief Fast IO
 */
#line 3 "sol.cpp"

#line 2 "library/String/zalgo.hpp"

template<typename T>vector<int> Zalgo(T& s){
   int n=s.size(); vector<int> res(n);
   for(int i=1,j=0;i<n;i++){
      if(i+res[i-j]<j+res[j])res[i]=res[i-j];
      else{
         int k=max(0,j+res[j]-i);
         while(i+k<n&&s[k]==s[i+k])k++;
         res[i]=k; j=i;
      }
   } res[0]=n; return res;
}

/**
 * @brief Z-Algorithm
 */
#line 5 "sol.cpp"

#line 2 "library/DataStructure/lichaotree.hpp"

template<typename T,T MX>struct CHT{
    using Line=pair<T,T>;
    int n;
    vector<T> xs;
    vector<Line> ls;
    CHT(vector<T>& ps):xs(ps){
        n=1;
        while(n<(int)xs.size())n<<=1;
        xs.resize(n,xs.back());
        ls.resize(2*n-1,Line(0,MX));
    }
    T eval(Line& f,T x){return f.first*x+f.second;}
    void add(T a,T b,int k=0,int L=0,int R=-1){
        if(R==-1)R=n;
        Line f={a,b};
        while(L!=R){
            int mid=(L+R)>>1;
            T lx=xs[L],mx=xs[mid],rx=xs[R-1];
            Line& g=ls[k];
            if(eval(f,lx)<eval(g,lx) and eval(f,rx)<eval(g,rx)){
                g=f;
                return;
            }
            if(eval(f,lx)>=eval(g,lx) and eval(f,rx)>=eval(g,rx))return;
            if(eval(f,mx)<eval(g,mx))swap(f,g);
            if(eval(f,lx)<eval(g,lx)){
                k=k*2+1;
                R=mid;
            }
            else{
                k=k*2+2;
                L=mid;
            }
        }
    }
    void add_segment(T a,T b,T L,T R){
        int l=lower_bound(ALL(xs),L)-xs.begin(),r=lower_bound(ALL(xs),R)-xs.begin();
        int a0=l,b0=r;
        l+=n,r+=n;
        int sz=1;
        while(l<r){
            if(r&1){
                r--;
                b0-=sz;
                add(a,b,r-1,b0,b0+sz);
            }
            if(l&1){
                add(a,b,l-1,a0,a0+sz);
                l++;
                a0+=sz;
            }
            l>>=1;
            r>>=1;
            sz<<=1;
        }
    }
    T getmin(T x){
        int k=lower_bound(ALL(xs),x)-xs.begin()+n-1;
        T res=eval(ls[k],x);
        while(k){
            k=(k-1)>>1;
            chmin(res,eval(ls[k],x));
        }
        return res;
    }
};

/**
 * @brief Convex Hull Trick (Li Chao Tree)
 * @docs docs/lichaotree.md
 */
#line 7 "sol.cpp"

FastIO io;
int main(){
    string s;
    io.read(s);

    int n=s.size();
    vector<int> tmp(n+1);
    iota(ALL(tmp),0);
    CHT<int,inf> dp(tmp);
    dp.add(1,0);
    auto seq=Zalgo(s);

    set<int> ok;
    rep(i,1,n)ok.insert(i);
    ok.insert(inf);
    map<int,vector<int>> elem;
    rep(i,1,n)elem[seq[i]].push_back(i);
    rep(i,0,n){
        for(auto& x:elem[i])ok.erase(x);

        if(i){
            int j=i+1,add=2;
            for(;;){
                j=*ok.lower_bound(j);
                if(j==inf)break;
                int val=dp.getmin(j);
                j+=i+1;
                if(j>n)break;
                dp.add_segment(1,val+add-j,j,n+1);
                add=1;
            }
        }
        // rep(j,0,n+1)io.write<false>(dp.getmin(j),' ');
        // io.write();
    }
    io.write(dp.getmin(n));
    return 0;
}