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  1. #include <iostream>
  2. #include <vector>
  3. #include <unordered_map>
  4. #include <string>
  5. #include <algorithm>
  6.  
  7. using namespace std;
  8.  
  9. // Function to convert a number to its binary representation of digits
  10. string toBinaryDigits(int num) {
  11.     string binary = "0000000000"; // 10 digits
  12.     while (num > 0) {
  13.         int digit = num % 10;
  14.         binary[digit] = '1'; // Mark the digit as present
  15.         num /= 10;
  16.     }
  17.     return binary;
  18. }
  19.  
  20. // Function to check if two binary representations have common digits
  21. bool areDigitsUnique(const string& bin1, const string& bin2) {
  22.     for (int i = 0; i < 10; i++) {
  23.         if (bin1[i] == '1' && bin2[i] == '1') {
  24.             return false;
  25.         }
  26.     }
  27.     return true;
  28. }
  29.  
  30. int main() {
  31.     int n;
  32.     cin >> n;
  33.  
  34.     vector<int> nums(n);
  35.     unordered_map<string, int> maxNumForBinary; // Map to store the maximum value for each binary digit representation
  36.     int maxPairSum = -1; // Default answer when no valid pair is found
  37.  
  38.     for (int i = 0; i < n; i++) {
  39.         cin >> nums[i];
  40.         string currentBinary = toBinaryDigits(nums[i]);
  41.  
  42.         // Iterate over all previously encountered binary digit patterns
  43.         for (auto& [binary, maxVal] : maxNumForBinary) {
  44.             if (areDigitsUnique(currentBinary, binary)) {
  45.                 // If the binary representations are unique, calculate the sum
  46.                 maxPairSum = max(maxPairSum, nums[i] + maxVal);
  47.             }
  48.         }
  49.  
  50.         // Update the maximum value for the current binary digit pattern
  51.         maxNumForBinary[currentBinary] = max(maxNumForBinary[currentBinary], nums[i]);
  52.     }
  53.  
  54.     cout << maxPairSum << endl;
  55.     return 0;
  56. }
Success #stdin #stdout 0s 5284KB
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https://ideone.com/9BT74H
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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