func_code_string: #include <bits/stdc++.h>   using namespace std;   int cnt[15];   string a[100009];   const long long mod = 998244353LL;   int main() {     int i, len1, len2, n, j;     long long p, sum, val;     cin >> n;     for (i = 1; i <= n; i++) {       cin >> a[i];       reverse(a[i].begin(), a[i].end());       cnt[a[i].size()]++;     }     for (i = 1, val = 0; i <= n; i++) {       len2 = a[i].size();       for (len1 = 1; len1 <= 10; len1++) {         sum = 0;         if (len1 < len2) {           for (j = 0, p = 1; j < len1; j++) {             sum += p * (a[i][j] - 48);             p = (p * 10LL) % mod;             sum += p * (a[i][j] - 48);             p = (p * 10LL) % mod;           }           for (j = len1; j < len2; j++) {             sum += p * (a[i][j] - 48);             sum += p * (a[i][j] - 48);             p = (p * 10LL) % mod;           }         } else {           for (j = 0, p = 1; j < len2; j++) {             sum += p * (a[i][j] - 48);             p = (p * 10LL) % mod;             sum += p * (a[i][j] - 48);             p = (p * 10LL) % mod;           }         }         val += (sum % mod) * cnt[len1];         val %= mod;       }     }     cout << val <<   n ;     return 0;   }   