func_code_string: #include <bits/stdc++.h>   using namespace std;   map<int, int> mp[11];   const int N = 2e5 + 5;   int ws(int u) { return (int)log10(u) + 1; }   int n, k, a[N], mo[11][N];   long long ans;   int main() {     scanf( %d%d , &n, &k);     for (int i = 1; i <= n; i++) {       scanf( %d , &a[i]);       mo[0][i] = a[i] % k;       for (int j = 1; j <= 10; j++) {         mo[j][i] = (int)(((long long)mo[j - 1][i] * 10) % k);       }     }     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= 10; j++) {         if (mo[j][i]) {           mp[j][mo[j][i]]++;         } else {           mp[j][0]++;         }       }     }     for (int i = 1; i <= n; i++) {       int w = ws(a[i]);       if (mo[0][i]) {         ans += mp[w][k - mo[0][i]];       } else {         ans += mp[w][0];       }       if ((mo[w][i] + mo[0][i]) % k == 0) {         ans--;       }     }     printf( %I64d n , ans);     return 0;   }   