Palindromi

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
    int n, k;
    cin >> n >> k;

    string pd(k, 'a');
    int r = n - k;
    string rs;
    for (int i = 0; i < r; ++i) {
        rs += (i % 2 == 0) ? 'b' : 'c';
    }

    cout << pd + rs << "\n";

}

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: WRONG ANSWER

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: WRONG ANSWER

Test 14

Verdict: WRONG ANSWER

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED