Need further explanation why the output is 5

Question

https://code.sololearn.com/cZn79l0At8xb/?ref=app

Answer 1

Let's solve this using old school method with BODMAS rule in mind

Given,
(arr 3[arr1[0] ][arr2[arr1[8]]] )

(arr3[arr1[0]][arr2[9]])

(arr3[arr1[0]][1])

(arr3[1][1])

5

Answer 2

arr3[arr1[0]][arr2[arr1[8]]]
arr3[1][arr2[9]]
arr3[1][1]
5

// int[ ][ ] arr3 ={
{1,2,3}, //0
{4,5,6}, //1
{7,8,9}, //2
{10} //3
};

Answer 3

thank you very much