Shared code

#include <bits/stdc++.h>
using namespace std;

int main() {
    string str;
    cin >> str;
        
    int mx = 1;
    int cur = 1;
    char p = str[0];
    for (int i = 1; i < str.length(); i++) {
        char c = str[i];
        if (c == p) {
            cur++;
            mx = max(mx, cur);
        }
        else {
            cur = 1;
        }
        p = c;
    }
    cout << mx;
}