count-number-of-texts

Count Number of Texts

java

python

python3

mysql

mssql

oraclesql

csharp

javascript

ruby

bash

swift

golang

scala

html

pythonml

kotlin

rust

typescript

racket

erlang

elixir

dart

countTexts

Alice is texting Bob using her phone. The mapping of digits to letters is shown in the figure below.
<img alt="" src="https://assets.leetcode.com/uploads/2022/03/15/1200px-telephone-keypad2svg.png" style="width: 200px; height: 162px;" />
In order to add a letter, Alice has to press the key of the corresponding digit <code>i</code> times, where <code>i</code> is the position of the letter in the key.

<ul>
	<li>For example, to add the letter <code>&#39;s&#39;</code>, Alice has to press <code>&#39;7&#39;</code> four times. Similarly, to add the letter <code>&#39;k&#39;</code>, Alice has to press <code>&#39;5&#39;</code> twice.</li>
	<li>Note that the digits <code>&#39;0&#39;</code> and <code>&#39;1&#39;</code> do not map to any letters, so Alice does not use them.</li>
</ul>

However, due to an error in transmission, Bob did not receive Alice&#39;s text message but received a string of pressed keys instead.

<ul>
	<li>For example, when Alice sent the message <code>&quot;bob&quot;</code>, Bob received the string <code>&quot;2266622&quot;</code>.</li>
</ul>

Given a string <code>pressedKeys</code> representing the string received by Bob, return the total number of possible text messages Alice could have sent.

Since the answer may be very large, return it modulo <code>109 + 7</code>.

&nbsp;
Example 1:

<pre>
Input: pressedKeys = &quot;22233&quot;
Output: 8
Explanation:
The possible text messages Alice could have sent are:
&quot;aaadd&quot;, &quot;abdd&quot;, &quot;badd&quot;, &quot;cdd&quot;, &quot;aaae&quot;, &quot;abe&quot;, &quot;bae&quot;, and &quot;ce&quot;.
Since there are 8 possible messages, we return 8.
</pre>

Example 2:

<pre>
Input: pressedKeys = &quot;222222222222222222222222222222222222&quot;
Output: 82876089
Explanation:
There are 2082876103 possible text messages Alice could have sent.
Since we need to return the answer modulo 109 + 7, we return 2082876103 % (109 + 7) = 82876089.
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= pressedKeys.length &lt;= 105</code></li>
	<li><code>pressedKeys</code> only consists of digits from <code>&#39;2&#39;</code> - <code>&#39;9&#39;</code>.</li>
</ul>

Hash Table

Math

String

Dynamic Programming

Accenture

Accolite

Activision

Adobe

Aetion

Affinity

Affirm

Airbnb

Airtel

Akamai

Akuna Capital

Alation

Alibaba

AllinCall

alphonso

Altimetrik

Amazon

American Express

Analytics quotient

AppDynamics

Apple

AQR Capital Management LLC

Arcesium

Arista Networks

Asana

Ascend

Athenahealth

Atlassian

Audible

Avalara

Baidu

Barclays

BitGo

BlackRock

Blizzard

Bloomberg

Bolt

Booking.com

Bridgewater Associates

ByteDance

C3 IoT

Canonical

Capgemini

Capital One

Cashfree

Cisco

Citadel

Citrix

Clari

Cloudera

Code Studio

codeagon

Codenation

CoderByte

Cognizant

Cohesity

Coinbase

Commvault

Coupang

Coursera

Cruise Automation

Cryptic Studios

DailyHunt

Databricks

Dataminr

DE Shaw

Dell

Deloitte

Deutsche Bank

DiDi

Directi

Discord

Docusign

DoorDash

Drawbridge

Dropbox

Dunzo

Duolingo

eBay

edabit

Electronic Arts

Epam Systems

Epic Systems

epiFi

Evernote

Expedia

Facebook

FactSet

Fallible

Fleetx

Flipkart

ForUsAll

fourkites

Garena

GE Digital

GE Healthcare

Online Assessment

Phone Interview

On Campus Interview

Onsite Interview

Don't know

last week

last month

last 3 months

last 6 months

more than 6 months

other