func_code_string: #include <bits/stdc++.h>   using namespace std;   const int M = 11, N = 2e5 + 5;   int n, k;   int a[N];   map<int, int> rem[M];   long long solve() {     long long ans = 0;     for (int i = 0; i < n; ++i) {       unsigned long long f = 10;       int ln = ((int)(to_string(a[i])).size());       for (int l = 1; l < M; ++l) {         int r = (k - (int)((f * a[i]) % k)) % k;         ans += rem[l][r];         if (l == ln && r == a[i] % k) ans--;         f *= 10;       }     }     return ans;   }   int main() {     ios::sync_with_stdio(0);     cin.tie(nullptr);     cout.tie(nullptr);     cin >> n >> k;     for (int i = 0; i < n; ++i) {       cin >> a[i];       int l = ((int)(to_string(a[i])).size());       rem[l][a[i] % k]++;     }     cout << solve() <<   n ;     return 0;   }   