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  1. #include <iostream>
  2. #include <set>
  3. #include <cstring>
  4. #include <cctype>
  5.  
  6. using namespace std;
  7.  
  8. int main() {
  9.     char str[100];
  10.     cin >> str;
  11.     int n = strlen(str);
  12.     set<char> s;
  13.     for (int i = 0; i < n; i++) {
  14.         if (isdigit(str[i])) {
  15.             s.insert(str[i]);
  16.         }
  17.     }
  18.     cout << s.size();
  19.     return 0;
  20. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/vDXJbv
ab12333145cd77
language:
C++14 (gcc 8.3)
created:
17 hours ago
visibility:
public

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