func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int word[4];     for (int i = 0; i < 4; i++) {       cin >> word[i];     }     int number = 0;     sort(word, word + 4);     for (int i = 0; i < 3; i++) {       for (int j = i + 1; j < 4; j++) {         if (word[i] == word[j]) {           number++;           i = j - 1;         } else {           i = j - 1;           break;         }       }     }     cout << number;     return 0;   }   