Palindromi

#include <bits/stdc++.h>
typedef long long ll;

using namespace std;

int main() {
    //ios_base::sync_with_stdio(false);
    //cin.tie(nullptr);
    //freopen(R"(C:\Users\Kymppi\Downloads\test_input.txt)", "r", stdin);

    ll u = 0;
    string s;
    cin >> s;
    for (int i = 0, j = s.size()-1; i<j; i++, j--) {
        if (s[i] != s[j]) u++;
    }
    cout << u << endl;
}

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