num24

#include <iostream>
#include <fstream>
#include <algorithm>
#include <string>
using namespace std;

int main()
{
    ifstream inFile("C:\\Users\\Максим\\Downloads\\24_demo.txt");
    string s;
    if (inFile)
        getline(inFile, s);
    s += s[s.size() - 1];
    int max = 1;
    int now = 1;
    for (int i = 1; i < s.size(); i++) {
        if (s[i] != s[i - 1]) {
            now++;
        }
        else {
            if (now > max) {
                max = now;
            }
            now = 1;
        }
    }
    cout << max;
}