Merkkijono

#include <bits/stdc++.h>


int main(){
std::string kirjaimet = "abcdefghijklmno";
int n;
std::string s = "a";
std::cin>>n;
for(int i = 1;i<n;i++){
    for (int j=0;j<2*i;j++){
        s.insert(2*j,1,kirjaimet[i]);
    }
}
std::cout<<s;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: WRONG ANSWER

Test 14

Verdict: WRONG ANSWER

Test 15

Verdict: WRONG ANSWER

Test 16

Verdict: WRONG ANSWER