Learned from Solution 883700, by Tim. run this just for checking: I reckon that function "sum" in that solution is redundant, and my guessing seems to be right.
Quick response! Seems 0 is better than infinity...
lol~ yes, in terms of code size, 0 is better than Inf :-)
Get the area codes from a list of phone numbers
Flag largest magnitude swings as they occur
Sum of odd numbers in a matrix
The sliding puzzle: 3D
Optimally fill a container with elements of different sizes
Sorting integers by their digits (Level 1)
Sorting integers by their digits (Level 4)
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