Please subscribe to the official Codeforces channel in Telegram via the link https://t.me/codeforces_official.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

The problem statement has recently been changed. View the changes.

×
B. A Tide of Riverscape

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard output Walking along a riverside, Mino silently takes a note of something.

"Time," Mino thinks aloud.

"What?"

"Time and tide wait for no man," explains Mino. "My name, taken from the river, always reminds me of this."

"And what are you recording?"

"You see it, tide. Everything has its own period, and I think I've figured out this one," says Mino with confidence.

Doubtfully, Kanno peeks at Mino's records.

The records are expressed as a string $$$s$$$ of characters '0', '1' and '.', where '0' denotes a low tide, '1' denotes a high tide, and '.' denotes an unknown one (either high or low).

You are to help Mino determine whether it's possible that after replacing each '.' independently with '0' or '1', a given integer $$$p$$$ is not a period of the resulting string. In case the answer is yes, please also show such a replacement to Mino.

In this problem, a positive integer $$$p$$$ is considered a period of string $$$s$$$, if for all $$$1 \leq i \leq \lvert s \rvert - p$$$, the $$$i$$$-th and $$$(i + p)$$$-th characters of $$$s$$$ are the same. Here $$$\lvert s \rvert$$$ is the length of $$$s$$$.

Input

The first line contains two space-separated integers $$$n$$$ and $$$p$$$ ($$$1 \leq p \leq n \leq 2000$$$) — the length of the given string and the supposed period, respectively.

The second line contains a string $$$s$$$ of $$$n$$$ characters — Mino's records. $$$s$$$ only contains characters '0', '1' and '.', and contains at least one '.' character.

Output

Output one line — if it's possible that $$$p$$$ is not a period of the resulting string, output any one of such strings; otherwise output "No" (without quotes, you can print letters in any case (upper or lower)).

Examples

Input

10 7

1.0.1.0.1.

Output

1000100010

Input

10 6

1.0.1.1000

Output

1001101000

Input

10 9

1........1

Output

No

Note

In the first example, $$$7$$$ is not a period of the resulting string because the $$$1$$$-st and $$$8$$$-th characters of it are different.

In the second example, $$$6$$$ is not a period of the resulting string because the $$$4$$$-th and $$$10$$$-th characters of it are different.

In the third example, $$$9$$$ is always a period because the only constraint that the first and last characters are the same is already satisfied.

Note that there are multiple acceptable answers for the first two examples, you can print any of them.

Codeforces (c) Copyright 2010-2021 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Sep/21/2021 08:47:13 (h1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|