Palindromi

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;

ll c = 0;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string s; getline(cin, s);

    int l = 0, r = s.size() - 1;

    while (l < r) {
        if (s[l] != s[r]) {
            s[l] = s[r];
            c++;
        }
        l++; r--;
    }

    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