func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T>   inline T gcd(T a, T b) {     return b ? gcd(b, a % b) : a;   }   template <typename T>   inline T lowbit(T x) {     return x & -x;   }   template <typename S, typename T>   void debug(S s, T t) {     cerr << s <<   ==   << t <<   n ;   }   template <typename T>   void debug(T t) {     cerr << t <<   n ;   }   template <typename T>   void debug(T t[], long long st, long long ed) {     for (long long i = st; i <= ed; ++i) {       cerr << t[i] <<    ;     }     cerr <<   n ;   }   template <typename T>   void debug(const vector<T>& t) {     for (long long i = 0; i < t.size(); ++i) cerr << t[i] <<    ;     cerr <<   n ;   }   const long long N = 2e5 + 10;   void solve() {     long long x, y;     cin >> x >> y;     if (y < x)       cout << x + y <<   n ;     else if (x == y)       cout << x <<   n ;     else       cout << y - (y % x) / 2 <<   n ;   }   signed main() {     long long _;     cin >> _;     while (_--) solve();     return 0;   }   