func_code_string: #include <bits/stdc++.h>   using namespace std;   map<long long, long long> mp[12];   long long a[200005], dig[200005];   long long state[200005][12];   int main() {     long long n, k;     scanf( %lld %lld , &n, &k);     for (int i = 0; i < n; i++) scanf( %lld , &a[i]);     for (int i = 0; i < n; i++) {       dig[i] = log10(a[i]) + 1;     }     for (int i = 0; i < n; i++) {       long long x = a[i];       long long tencnt = 1;       while (tencnt < 11) {         x = (x * 10LL) % k;         mp[tencnt][x]++;         state[i][tencnt] = x;         tencnt++;       }     }     long long ans = 0;     for (int i = 0; i < n; i++) {       long long len = dig[i];       long long m = (k - (a[i] % k)) % k;       if (mp[len].count(m) == 0) continue;       ans += mp[len][m];     }     for (int i = 0; i < n; i++) {       long long len = dig[i];       long long x = state[i][len];       if ((x + a[i]) % k == 0) {         ans--;       }     }     printf( %lld n , ans);   }   