func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 1e5 + 30;   signed main() {     ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);     string s;     cin >> s;     int n = s.size();     int pref = 0, suf = n - 1;     while (pref < n - 1 && s[pref] != s[pref + 1]) pref++;     while (suf > 0 && s[suf] != s[suf - 1]) suf--;     int ans = min(n, (s[n - 1] != s[0] ? pref + 1 + (n - suf) : 0));     for (int i = 0; i < n; i++) {       int j = i;       while (j < n - 1 && s[j] != s[j + 1]) j++;       ans = max(ans, j - i + 1);       i = j;     }     cout << ans;     return 0;   }   