2015 Cifre

/* https://www.rpz-rs.org/sajt/doc/file/web_portal/04/4.7/Skolska_14-15/Informatika/SS/Materijali/SS_Takmicarski_zadaci_iz_informatike_2015/Republicko/Inf_ss_rep.pdf */

/* CIFRE */

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
    string a;
    cin>>a;
    string b;
    cin>>b;

    int niz1[10]={0};
    int niz2[10]={0};

    for (int i=0;i<a.size();i++)
    {
        int e=a[i]-'0';

        niz1[e]++;
    }

    for (int i=0;i<b.size();i++)
    {
        int e=b[i]-'0';

        niz2[e]++;
    }

    int br=0;
    for (int i=0;i<10;i++)
        if ( niz1[i] != 0 && niz2[i] != 0) br+=min(niz1[i],niz2[i]);

    cout<<a.size()-br<<endl;
    return 0;
}