#include<bits/stdc++.h>
using namespace std;
int main(){
    int a[19]={0},b[49]={0},n,i,d,h;
    for(i=0;i<=49;i++){
    	cin>>b[i];
    }
    for(i=0;i<=49;i++){
        a[b[i]]++;
    }
    d=a[0];
    for(i=0;i<=19;i++){
    	if(d<a[i]){
    		d=a[i];
    		h=i;
    	}
    }
    cout<<a[h];
}
/**************************************************************
	Problem: 1180
	User: huanghengyi
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/