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  1. #include<bits/stdc++.h>
  2. #define int long long
  3. using namespace std;
  4. signed main() {
  5.     ios::sync_with_stdio(0);
  6.     cin.tie(0); cout.tie(0);
  7.     string s; cin >> s;
  8.     map<char, int> mp;
  9.     for(char c : s) mp[c] ++;
  10.     int ans = 0;
  11.     for(auto x : mp) if(x.second % 2) ans ++;
  12.     cout << max(0LL, ans - 1);
  13. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/pCTRHm
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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