func_code_string: #include <bits/stdc++.h>   using namespace std;   inline long long read() {     long long sign = 1;     long long x = 0;     char ch;     while (!isdigit(ch = getchar()))       if (ch ==  - ) sign = -1;     while (isdigit(ch)) x = x * 10 + ch -  0 , ch = getchar();     return x * sign;   }   inline void wonl() { putchar(  n ); }   inline void wws() { putchar(   ); }   inline void dbg() { cout << endl; }   inline void ww(long long k) {     if (k < 0) putchar( - ), k *= -1;     char ch[20];     int num = 0;     while (k) ch[++num] = k % 10, k /= 10;     if (num == 0) ch[++num] = 0;     while (num) putchar(ch[num--] +  0 );   }   const int N = 1e5 + 4;   template <typename T, typename... V>   inline void wonl(T t, V... v) {     ww(t);     if (sizeof...(v)) putchar(   );     wonl(v...);   }   template <typename T, typename... V>   inline void wws(T t, V... v) {     ww(t);     if (sizeof...(v)) putchar(   );     wws(v...);   }   template <typename T, typename... V>   inline void dbg(T t, V... v) {     cout <<     << t;     dbg(v...);   }   void solve() {     int n = read(), a;     map<int, int> ma;     for (int i = 0; i < n; i++) a = read(), ma[a]++;     vector<int> v;     for (auto it : ma) v.push_back(it.second);     sort(v.begin(), v.end());     reverse(v.begin(), v.end());     long long num = 1;     while (v[0] >= num) num *= 2;     long long fans = 0;     while (num) {       long long ter = num;       long long a = INT_MAX;       int k = 0;       while (ter != 0 && k < v.size()) {         a = min(a, v[k] / ter), ter = ter / 2, k++;       }       if (ter == 0) fans = max(fans, a * (num * 2 - 1));       num = num / 2;     }     wonl(fans);   }   int main() {     solve();     return 0;   }   