Palindromi

#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define all(v) begin(v), end(v)

void solve() {
    string s;
    cin >> s;
    int n = s.size();
    int ans = 0;
    for (int i=0; i<n/2; i++) {
        ans += s[i] != s[n-i-1];
    }
    cout << ans << '\n';
}


int main() {
    cin.tie(0)->sync_with_stdio(0);
    int tc=1;
    // cin >> tc;
    while (tc--) solve();
}

Test 1 (public)

Verdict: ACCEPTED

Test 2 (public)

Verdict: ACCEPTED

Test 3 (public)

Verdict: ACCEPTED

Test 4 (public)

Verdict: ACCEPTED

Test 5 (public)

Verdict: ACCEPTED

Test 6 (public)

Verdict: ACCEPTED

Test 7 (public)

Verdict: ACCEPTED

Test 8 (public)

Verdict: ACCEPTED

Test 9 (public)

Verdict: ACCEPTED

Test 10 (public)

Verdict: ACCEPTED