Two-digit numbers 3
Execution time limit is 1 second
Runtime memory usage limit is 64 megabytes
Calculate the sum of all two-digit numbers where the digits are in descending order and their sum equals m.
Input
A natural number m, where 0 ≤ m ≤ 20.
Output
A single integer representing the solution to the problem.
Examples
Input #1
Answer #1
Input #2
Answer #2
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Acceptance rate 54%