func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long MAX = 1000009;   long long mod = 998244353;   long long n, kek[MAX];   vector<long long> child[MAX];   long long bin(long long num, long long power) {     if (power == 0)       return 1;     else {       long long an = (num) % mod;       if (power % 2 == 0) {         an = bin(num, power / 2);         long long an1 = an;         an *= an1;         an %= mod;         return an;       } else {         an *= bin(num, power - 1);         an %= mod;         return an;       }     }   }   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long q;     cin >> q;     while (q--) {       long long n, k;       cin >> n >> k;       if (n % k <= k / 2) {         cout << n <<   n ;       } else         cout << n - ((n % k) - k / 2) <<   n ;     }     return 0;   }   