func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mod = 998244353;   inline int add(int a, int b) { return a + b < mod ? a + b : a + b - mod; }   inline int mul(int a, int b) { return int(1LL * a * b % mod); }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n;     cin >> n;     vector<string> s(n);     for (int i = 0; i < n; i++) {       cin >> s[i];     }     int pw = 1;     int ans = 0;     int t = (int)s[0].size();     for (int i = 0; i < t; i++) {       for (string xd : s) {         int at = mul(xd.back() -  0 , pw);         ans = add(ans, mul(at, n));       }       pw = mul(pw, 10);       for (string &xd : s) {         int at = mul(xd.back() -  0 , pw);         ans = add(ans, mul(at, n));         xd.pop_back();       }       pw = mul(pw, 10);     }     cout << ans <<   n ;     return 0;   }   