#include <iostream>

using namespace std;

int main()
{int a[10000];
int n[10000];
int max = 1;
for(int i; i < 10000; i++)
{cin >>a[i];
if(a[i] == 0)
{break;}}
for(int i; a[i] != 0; i++)
{if (a[i]==a[i+1])
{max++;}
else
{n[i]=max;
max = 1;}}
int k =  n[0];
for (int i = 1; i < 10000; i++)
{if ( n[i] > k)
{k = n[i];}}
cout <<k;
}