func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long int t;     cin >> t;     while (t) {       t--;       long long int n, k;       cin >> n >> k;       long long int a[k];       map<long long int, long long int> m;       for (int i = 0; i < k; ++i) {         cin >> a[i];         m[a[i]]++;       }       long long int pow = 1, f = 0, ans = 0;       while (n) {         if (n % 2 == 1) {           if (m[pow] == 0) {             long long int x = 0;             for (long long int i = pow; i < 1000000000; i *= 2) {               if (m[i] != 0) {                 x = i;                 break;               }             }             m[x]--;             while (x != pow && x != 0) {               x /= 2;               m[x] += 1;               ans += 1;             }             if (x == 0) {               f = 1;               break;             }           } else {             m[pow]--;           }         }         m[2 * pow] += m[pow] / (2);         m[pow] = 0;         n /= 2;         pow *= 2;       }       if (f) {         cout << -1 <<   n ;       } else {         cout << ans <<   n ;       }     }     return 0;   }   