func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int n, i, ans, st, ed;     cin >> n;     string s;     cin >> s;     st = 1, ed = 1;     for (i = 1; i < n; i++) {       if (s[i] == s[i - 1])         st++;       else         break;     }     for (i = n - 2; i >= 0; i--) {       if (s[i] == s[i + 1])         ed++;       else         break;     }     if (s[0] == s[n - 1]) {       ans = ((ed + 1) * (st + 1)) % 998244353;     } else {       ans = (st + ed) % 998244353;       ans = (ans + 1) % 998244353;     }     cout << ans << endl;   }   