Palindromi

input/code.cpp: In function 'int main()':
input/code.cpp:12:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for (int i=0; i<palindrome.size()/2; i++) {
      |                   ~^~~~~~~~~~~~~~~~~~~~

#include <iostream>
#include <vector>


int main() {
    int N, K;

    std::cin >> N >> K;

    std::vector<char> palindrome(K);

    for (int i=0; i<palindrome.size()/2; i++) {
        char c = (char)('a'+(i%24));
        palindrome[i] = c;
        palindrome[palindrome.size()-1-i] = c;
    }

    if (palindrome.size() % 2) palindrome[palindrome.size()/2] = (char)('a'+24);

    int left = N - palindrome.size();

    if (left > 0) {
        palindrome.push_back('z');
        left--;
    }

    int i=0;
    while (left > 0) {
        palindrome.push_back((char)('a'+(i%24)));
        left--;
        i++;
    }
    
    for (char c : palindrome)  { std::cout << c; }

    return 0;
}

// 'a'+25 = z

// (i%25) last is Y

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: ACCEPTED

Test 14

Verdict: WRONG ANSWER

Test 15

Verdict: WRONG ANSWER

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED