Counting Occurrences in a List

You are given a list of integers and a target integer. Your task is to count the occurrences of the target in the list in a cumulative way. More specifically, for every index i such that L[i] == target, you need to output a key-value pair where the key is i and the value is the number of times the target has appeared in the list up to and including index i.

For example, if the list is [7, 7, 7, 7, 7] and the target is 7, then the output should be:

If the target is not present in the list, output an empty dictionary: {}. The indices in the output should be in increasing order.

inputFormat

The input is read from stdin in the following format:

1. An integer n, the number of elements in the list.
2. A line containing n space-separated integers representing the list.
3. An integer representing the target value.

outputFormat

Output the dictionary (in Python-style format) that maps each index where the target is found to the cumulative count of occurrences up to that index. The output is printed to stdout.

5
1 2 3 4 5
3

{2: 1}