برنامه به زبان پایتون
هشت سال پیش منتشر شده
تعداد بازدید: 557
کد پروژه: 66399
شرح پروژه
time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output
Limak is a little polar bear. He likes nice strings — strings of length n, consisting of lowercase English letters only.
The distance between two letters is defined as the difference between their positions in the alphabet. For example, , and .
Also, the distance between two nice strings is defined as the sum of distances of corresponding letters. For example, , and .
Limak gives you a nice string s and an integer k. He challenges you to find any nice string s' that . Find any s' satisfying the given conditions, or print "-1" if it's impossible to do so.
As input/output can reach huge size it is recommended to use fast input/output methods: for example, prefer to use gets/scanf/printf instead of getline/cin/cout in C++, prefer to use BufferedReader/PrintWriterinstead of Scanner/System.out in Java.
Input
The first line contains two integers n and k (1 ≤ n ≤ 105, 0 ≤ k ≤ 106).
The second line contains a string s of length n, consisting of lowercase English letters.
Output
If there is no string satisfying the given conditions then print "-1" (without the quotes).
Otherwise, print any nice string s' that .
Examples
input
Copy
4 26
bear
output
roar
input
Copy
2 7
af
output
db
input
Copy
3 1000
hey
output
-1
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