#include <iostream>

using namespace std;

int main()
{
    setlocale(LC_ALL, "Russian");
    cout << "Введите строку: " << endl;
    string s;
    cin >> s;
    s = s + " ";
    int max = 1;
    int maxAnswer = 0;
    for (int i = 1; i < s.size(); i++)
        if (s[i] == s[i - 1])
            max++;
        else {
            if (max > maxAnswer)
                maxAnswer = max;
            max = 1;
        }
    cout << maxAnswer;
}