Digit sum

You are given a list of numbers, and your task is to write a program that calculates the sum of the digits of each number in the list, and then returns the total sum of all the digits.
The first line of the input contains an integer n. The next n lines contain positive integers. Print the sum of the digits of all input numbers.
3 123 234 345
4 42 53 420 36


Time limit: 2 seconds

Memory limit: 512 MB

Output limit: 1 MB

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