Smallest Index With Equal Value
We need to find the smallest index i
in the array nums
such that the remainder of the division of i
by 10 is equal to the value at that index in the array. If no such index exists, we’ll return 1.
Here’s a clear stepbystep approach to solve this problem:
 Iterate through the array using index
i
.  For each index
i
, calculate the remainder ofi
when divided by 10 using the modulo operator (%
).  Check if this remainder is equal to the value at the corresponding index in the array (
nums[i]
).  If it is, return the index
i
.  If no such index is found, return 1.


Explanation:
 By iterating through the array and calculating the remainder of each index when divided by 10, we’re essentially checking if the current index follows the condition
i mod 10 == nums[i]
.  If we find an index that meets this condition, we return it immediately, thus ensuring that we return the smallest such index.
 If we iterate through the entire array without finding such an index, we return 1, indicating that no such index exists.