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- #include <bits/stdc++.h>
- #pragma GCC optimize("0")
- using namespace std;
- #define cin(vec) for(auto& i : vec) cin >> i
- #define cin_2d(vec, n, m) for(int i = 0; i < n; i++) for(int j = 0; j < m && cin >> vec[i][j]; j++);
- #define cout(vec) for(auto& i : vec) cout << i << " "; cout << "\n";
- #define cout_2d(vec, n, m) for(int i = 0; i < n; i++, cout << "\n") for(int j = 0; j < m && cout << vec[i][j] << " "; j++);
- #define cout_map(mp) for(auto& [f, s] : mp) cout << f << " " << s << "\n";
- #define Time cerr << "Time Taken: " << (float)clock() / CLOCKS_PER_SEC << " Secs" << "\n";
- #define fixed(n) fixed << setprecision(n)
- #define ceil(n, m) (((n) / (m)) + ((n) % (m) ? 1 : 0))
- #define fill(vec, value) memset(vec, value, sizeof(vec));
- #define Num_of_Digits(n) ((int)log10(n)+1)
- #define all(vec) vec.begin(),vec.end()
- #define rall(vec) vec.rbegin(),vec.rend()
- #define sz(x) int(x.size())
- #define TC int t; cin >> t; while(t--)
- #define fi first
- #define se second
- #define Pair pair < int, int >
- #define ll long long
- #define ull unsigned long long
- #define Mod 1'000'000'007
- #define INF 2'000'000'000
- #define EPS 1e-9
- #define PI acos(-1)
- void Code_Crush(){
- ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
- #ifndef ONLINE_JUDGE
- freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
- #endif
- }
- vector < int > freq(26);
- bool check(int l, int r, string s){
- freq.assign(26, 0);
- for(int i = l; i <=r; i++)
- freq[s[i] - 'a']++;
- int odd = 0;
- for(auto& i : freq)
- odd += (i % 2);
- return odd <= 1;
- }
- int main(){
- Code_Crush();
- string s; cin >> s;
- int count = sz(s);
- for(int i = 0; i < sz(s); i++)
- for(int j = i + 1; j < sz(s); j++)
- count += check(i, j, s);
- cout << count;
- Time
- return 0;
- }
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