Spot the odd card payments
A bank in Dubai screens the day's card payments of one customer. A payment is flagged for manual review when it sits unusually far from the customer's normal behaviour, measured with z-scores.
Task: line 1 has the payment amounts (numbers separated by spaces, possibly with decimals). Line 2 has the threshold T (a number). Compute the mean and the population standard deviation (divide by n) of all amounts. A payment is an outlier when |amount - mean| / std is strictly greater than T. Print the outlier amounts exactly as they were written in the input, in input order, separated by single spaces. Print none when there are no outliers (this includes the case where the standard deviation is 0).
Sample tests
Input
45.50 52 48.25 50 47 51.75 49 980 46 2
Expected output
980
Input
10 12 11 13 12 11 40 12 1.5
Expected output
40
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Keep the original text tokens next to their numeric values so you can print them untouched.
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