A10818. New Password
编程题
普及/提高-
知识点
题目描述
Innokentiy decides to change the password in the social net "Contact!", but he is too lazy to invent a new password by himself. That is why he needs your help.
Innokentiy decides that new password should satisfy the following conditions:
- the length of the password must be equal to $n$ ,
- the password should consist only of lowercase Latin letters,
- the number of distinct symbols in the password must be equal to $k$ ,
- any two consecutive symbols in the password must be distinct.
Your task is to help Innokentiy and to invent a new password which will satisfy all given conditions.
Innokentiy decides that new password should satisfy the following conditions:
- the length of the password must be equal to $n$ ,
- the password should consist only of lowercase Latin letters,
- the number of distinct symbols in the password must be equal to $k$ ,
- any two consecutive symbols in the password must be distinct.
Your task is to help Innokentiy and to invent a new password which will satisfy all given conditions.
输入格式
The first line contains two positive integers $n$ and $k$ ( $2<=n<=100$ , $2<=k<=min(n,26)$ ) — the length of the password and the number of distinct symbols in it.
Pay attention that a desired new password always exists.
Pay attention that a desired new password always exists.
输出格式
Print any password which satisfies all conditions given by Innokentiy.
输入输出样例
输入 #1
4 3
输出 #1
java
输入 #2
6 6
输出 #2
python
输入 #3
5 2
输出 #3
phphp
说明/提示
In the first test there is one of the appropriate new passwords — java, because its length is equal to $4$ and $3$ distinct lowercase letters a, j and v are used in it.
In the second test there is one of the appropriate new passwords — python, because its length is equal to $6$ and it consists of $6$ distinct lowercase letters.
In the third test there is one of the appropriate new passwords — phphp, because its length is equal to $5$ and $2$ distinct lowercase letters p and h are used in it.
Pay attention the condition that no two identical symbols are consecutive is correct for all appropriate passwords in tests.
In the second test there is one of the appropriate new passwords — python, because its length is equal to $6$ and it consists of $6$ distinct lowercase letters.
In the third test there is one of the appropriate new passwords — phphp, because its length is equal to $5$ and $2$ distinct lowercase letters p and h are used in it.
Pay attention the condition that no two identical symbols are consecutive is correct for all appropriate passwords in tests.