from sys import stdin
from collections import defaultdict
import string
input = stdin.readline
class Solution:
def dfs(self, u):
while self.G[u]:
v = self.G[u].pop()
self.dfs(v)
self.tour.append(u)
def find_tour(self):
self.n, self.k = map(int, input().split())
letters = string.ascii_lowercase[:self.k]; self.tour = []
self.G = defaultdict(list)
for l1 in letters:
for l2 in letters:
self.G[l1].append(l2)
self.dfs('a')
self.tour.pop()
ans = []
for i in range(self.n):
ans.append(self.tour[i % len(self.tour)])
print(''.join(ans))
solution_obj = Solution()
solution_obj.find_tour()
#include <bits/stdc++.h>
#include <unordered_set>
#include <iostream>
#include <string>
using namespace std;
typedef long long int ll;
const int mod = 1e9 + 7;
#define INF 1e9
#define CLR(a) memset(a, 0, sizeof(a))
#define SET(a, val) memset(a, val, sizeof(a))
#define N 200005
void solve(int round)
{
int n, k;
int last = 0;
string s = "";
cin >> n >> k;
while (s.size() < n) {
for (int j1 = 0; (j1 < k) && (s.size() < n); j1++) {
s += ('a' + j1);
for (int j2 = j1+1; (j2 < k) && (s.size() < n); j2++) {
s += ('a' + j1);
s += ('a' + j2);
}
}
}
if (s.size() > n) {
s.pop_back();
}
printf("%s\n", s.c_str());
}
int main()
{
#if 1
std::ifstream in("C:\\Users\\user\\source\\repos\\ConsoleApplication1\\ConsoleApplication1\\test.txt", ::std::ios::binary);
std::streambuf* cinbuf = std::cin.rdbuf();//save old buf
std::cin.rdbuf(in.rdbuf());//redirect std::cin to in.txt!
#endif
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int tc = 1;
int round = 1;
//cin >> tc;
while (tc--) {
solve(round);
round++;
}
return 0;
}1430B - Barrels | 279B - Books |
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1213C - Book Reading | 1468C - Berpizza |
1546B - AquaMoon and Stolen String | 1353C - Board Moves |
902A - Visiting a Friend | 299B - Ksusha the Squirrel |
1647D - Madoka and the Best School in Russia | 1208A - XORinacci |
1539B - Love Song | 22B - Bargaining Table |
1490B - Balanced Remainders | 264A - Escape from Stones |
1506A - Strange Table | 456A - Laptops |
855B - Marvolo Gaunt's Ring | 1454A - Special Permutation |
1359A - Berland Poker | 459A - Pashmak and Garden |
1327B - Princesses and Princes | 1450F - The Struggling Contestant |
1399B - Gifts Fixing | 1138A - Sushi for Two |
982C - Cut 'em all | 931A - Friends Meeting |
1594A - Consecutive Sum Riddle | 1466A - Bovine Dilemma |