Submission

Score: 100

User: navysrimuang

Problemset: วิศวกรรมข้อมูล

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-03 20:32:15

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;

string tobin(int x){
  if(x == 0){
    return "0";
  }
  string prod;
  while(x!=0){
    int r = x%2;
    prod += ('0' + r);
    x/=2;

  }
  reverse(prod.begin(), prod.end());
  return prod;

}

bool cmp(string a,string b){
  return (a+b) > (b+a);
}

int main(){
  int n; cin >> n;
  vector<string> v (n);
  for(int i = 0;i<n;i++){
    int x; cin >> x;
    v[i] = tobin(x);
  }

  sort(v.begin(), v.end(), cmp);
  string binres;
  for(auto s:v){
    binres += s;
  }
  
  int dec = stoi(binres, nullptr, 2);
  cout << dec << endl;
  return 0;
}