# [LeetCode]#2194. Cells in a Range on an Excel Sheet

**Environment: Python 3.8**

**Key technique: chr, ord, for**

A cell `(r, c)`

of an excel sheet is represented as a string `"<col><row>"`

where:

`<col>`

denotes the column number`c`

of the cell. It is represented by**alphabetical letters**.- For example, the
`1st`

column is denoted by`'A'`

, the`2nd`

by`'B'`

, the`3rd`

by`'C'`

, and so on. `<row>`

is the row number`r`

of the cell. The`rth`

row is represented by the**integer**`r`

.

You are given a string `s`

in the format `"<col1><row1>:<col2><row2>"`

, where `<col1>`

represents the column `c1`

, `<row1>`

represents the row `r1`

, `<col2>`

represents the column `c2`

, and `<row2>`

represents the row `r2`

, such that `r1 <= r2`

and `c1 <= c2`

.

Return *the **list of cells*`(x, y)`

*such that* `r1 <= x <= r2`

*and* `c1 <= y <= c2`

. The cells should be represented as **strings** in the format mentioned above and be sorted in **non-decreasing** order first by columns and then by rows.

**Example 1:**

**Input:** s = "K1:L2"

**Output:** ["K1","K2","L1","L2"]

**Explanation:**

The above diagram shows the cells which should be present in the list.

The red arrows denote the order in which the cells should be presented.

**Example 2:**

**Input:** s = "A1:F1"

**Output:** ["A1","B1","C1","D1","E1","F1"]

**Explanation:**

The above diagram shows the cells which should be present in the list.

The red arrow denotes the order in which the cells should be presented.

**Analysis:**

- Convert the letter to a number such as “A” to 65.
- Let “1” as int.
- Use for loop to list all root.

**Solution:**

class Solution:

def cellsInRange(self, s):

ans=[]

for i in range(ord(s[0]),ord(s[3])+1):

for j in range(int(s[1]),int(s[4])+1):ans.append(chr(i)+str(j))

return ans

**Submissions:**