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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	string s; cin >> s;
  6. 	int cnt[30] = {}, ans = 0;
  7. 	for(size_t i=0; i<s.length(); i++) cnt[ s[i] - 'a' ]++;
  8. 	for(int i=0; i<26; i++) if(cnt[i] % 2) ans++;
  9. 	cout << ans / 2 << endl;
  10. 	return 0;
  11. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/jzgkP3
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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