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  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4. #include <unordered_set>
  5.  
  6. using namespace std;
  7.  
  8. void generateCombinations(vector<string>& inputStrings, string& currentString, int index, unordered_set<string>& uniqueCombinations) {
  9.     if (index == currentString.length()) {
  10.         uniqueCombinations.insert(currentString);
  11.         return;
  12.     }
  13.  
  14.     for (int i = 0; i < inputStrings.size(); ++i) {
  15.         currentString[index] = inputStrings[i][index];
  16.         generateCombinations(inputStrings, currentString, index + 1, uniqueCombinations);
  17.     }
  18. }
  19.  
  20. vector<string> generateUniqueCombinations(vector<string>& inputStrings) {
  21.     unordered_set<string> uniqueCombinations;
  22.     int length = inputStrings[0].length();
  23.     string currentString(length, ' ');
  24.  
  25.     generateCombinations(inputStrings, currentString, 0, uniqueCombinations);
  26.  
  27.     return vector<string>(uniqueCombinations.begin(), uniqueCombinations.end());
  28. }
  29.  
  30. int main() {
  31.     int N, M;
  32.     cin >> N >> M;
  33.  
  34.     vector<string> inputStrings(N);
  35.     for (int i = 0; i < N; ++i) {
  36.         cin >> inputStrings[i];
  37.     }
  38.  
  39.     vector<string> uniqueCombinations = generateUniqueCombinations(inputStrings);
  40.  
  41.     for (const string& combination : uniqueCombinations) {
  42.         cout << combination << endl;
  43.     }
  44.  
  45.     return 0;
  46. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin
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3 2
abc
def
stdout
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c
e
dbf
ae
dbc
aec
af
ab
abf
abc
aef
db
bf
de
d
def
dc
ac
b
ef
df
dec
bc
f
a
ec
https://ideone.com/DZNlBz
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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