//Ѓорче
#include <iostream>
using namespace std;
  
int main()
{
    int a[4];
    cin>>a[0]>>a[1]>>a[2]>>a[3];
      
    int zero = 0, five = 0;
    for (int i=0; i<4; i++)
    {
        if (a[i] == 0)
           zero++;
        else
            five++;
    }
      
    if (zero >= five)
       cout<<five<<endl;
    else
        cout<<zero<<endl;
          
    //system("pause");
    return 0;
}

//Ѓорче
#include <iostream>
#include <vector>
using namespace std;
 
int main()
{
    int N;
    cin >>N;
     
    vector<int> kand(N);
     
    for (int i=0; i<N; i++)
    {
        int a, b;
        cin>>a>>b;
        kand[i] = a*60 + b;
    }
     
    int sum = 1;
    for (int i=0; i<N-1; i++)
    {
        int temp = 1;
        for (int j=i+1; j<N; j++)
        {
            if (kand[i] == kand[j])
                        temp++;
            else
                break;  
        }
        if (temp > sum)
           sum = temp;
    }
    cout<<sum<<endl;
    //system("pause");
    return 0;
}

//Ѓорче
#include <iostream>
using namespace std;
  
int main()
{
    int a, b;
    cin>>a>>b;
      
    int num[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
    for (int i=a; i<=b; i++)
    {
        for (int j=1; j<=i; j*=10)
        {
            int r = (i/j)%10;
            num[r]++;
        }
    }
      
    for (int i=0; i<10; i++)
        cout<<num[i]<<" ";
    cout<<endl;
    //system("pause");
    return 0;
}

//Ѓорче
#include <iostream>
using namespace std;
  
int main()
{
    int a, b;
    cin>>a>>b;
      
    int sum;
    if (a == b)
       sum = a*2-2;
    else if (a < b)
         sum = a*2 - 1;
    else
         sum = b*2 - 2;
           
    cout<<sum<<endl;
    //system("pause");
    return 0;
}

//Ѓорче
#include <iostream>
using namespace std;
  
int main()
{
    long long broj; 
    int k;
    cin>>broj>>k;
      
     long long x=1;
    for (long long i=broj+1; i>0; i+=x)
    {
        int sum=0;
        for (long long y=1; y<=i; y*=10)
        {
            if ((i/y)%10 == 7)
               sum++;
        }
        if ((i/x) % 10 ==7)
           x*=10;
          
        if (sum >= k)
        {
                cout<<i<<endl;
                break;
        }
          
    }
    //system("pause");
    return 0;
}