Palindromi

#include<bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

#define MOD (ll)(998244353LL) //1e9+7

int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    
    string s; cin >> s;
    int c = 0; int n = s.size();
    for (int i = 0; i < n / 2; i++) {
        if (s[i] != s[n-i-1]) c++;
    }
    cout << c << "\n";
}

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