Palindromi

#include <iostream>
#include <iomanip>
#include <vector>
#include <map>
#include <unordered_map>
#include <cmath>
#include <algorithm>
#include <optional>
#include <string>


typedef long long ll;
typedef unsigned long long ull;
//typedef unsigned int uint;

using namespace std;


int main(){


    string line= "";
    int ongelmia = 0;

    getline(cin,line);

    for (int i = 0; i < floor(line.size()/2); i++)
    {
        char a1 = line[i];
        char a2 = line[line.size()-1-i];
        if(a1 != a2){
            ongelmia += 1;
        }
        
    }
    
    cout << ongelmia;

    return 0;
}

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