# [Solution] Count Number of Texts solution leetcode

## Count Number of Texts solution leetcode

Alice is texting Bob using her phone. The **mapping** of digits to letters is shown in the figure below.

In order to **add** a letter, Alice has to **press** the key of the corresponding digit `i`

times, where `i`

is the position of the letter in the key.

- For example, to add the letter
`'s'`

, Alice has to press`'7'`

four times. Similarly, to add the letter`'k'`

, Alice has to press`'5'`

twice. - Note that the digits
`'0'`

and`'1'`

do not map to any letters, so Alice**does not**use them.

[Solution] Count Number of Texts solution leetcode

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

- For example, when Alice sent the message
`"bob"`

, Bob received the string`"2266622"`

.

Given a string `pressedKeys`

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** `10`

.^{9} + 7

[Solution] Count Number of Texts solution leetcode

## [Solution] Count Number of Texts solution leetcode

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

**Example 2:**

Input:pressedKeys = "222222222222222222222222222222222222"Output:82876089Explanation:There are 2082876103 possible text messages Alice could have sent. Since we need to return the answer modulo 10^{9}+ 7, we return 2082876103 % (10^{9}+ 7) = 82876089.

[Solution] Count Number of Texts solution leetcode

## Count Number of Texts solution leetcode

`1 <= pressedKeys.length <= 10`

^{5}`pressedKeys`

only consists of digits from`'2'`

–`'9'`

## For Solution

## “Click here“