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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. int mask(int n) {
  8.   int mask = 0;
  9.   for (int i = 1; n/i; i*= 10) {
  10.     int digit = n/i % 10;
  11.     mask |= 1 << digit;
  12.   }
  13.   return mask;
  14. }
  15.  
  16. int dp(int set, int memo[1<<10], const vector<int>& a) {
  17.   if (set == 0) {
  18.     return memo[set] = 0;
  19.   }
  20.   if (memo[set] != -1)
  21.     return memo[set];
  22.  
  23.   int res = 0;
  24.   for (auto num: a) {
  25.     int bitmask = mask(num);
  26.     if ((set | bitmask) == set)
  27.       res = std::max(dp(set ^ mask(num), memo, a) + num, res);
  28.   }
  29.   return memo[set] = res;
  30. }
  31.  
  32. int main()
  33. {
  34.   vector<int> a =  {121,23,3,333,4};
  35.   int memo[1<<10];
  36.   for (int i = 0; i < 1 << 10; i++) memo[i] = -1;
  37.  
  38.   int res = 0;
  39.   for (int i = 0; i < 1 << 10; i++) {
  40.     res = std::max(res, dp(i, memo, a));
  41.   }
  42.   cout << res << std::endl;
  43.  
  44.   return 0;
  45. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/viJjnW
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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