I was obtaining 34 for 7e4 too, but it's not a problem of the test suite. It just means that your code is not testing all possible combinations (and there are probably other numbers that will fail too). There is no known algorithm to generate the list of integer complexity (https://oeis.org/A005245), which means brute force is the only way to be sure. And brute force finds 32 for 7e4.
It someone doesn't believe 7e4 = (1+1)*(1+1)*(1+1)*(1+1)*(1+ (1+1)*(1+1+1)*(1+1+1)*(1+1+1)*(1+1+1)*(1+1+1)*(1+1+1)*(1+1+1)) (32 ones). Or 2^4*(1 + 2*3^7).
Construct an index vector from two input vectors in vectorized fashion
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Reverse the elements of an array
Convert Two Character String into a Binary Vector
Adding Cells with numbers defined as strings
String Array Basics, Part 4: Convert String Array with Missing Values to Cell Array
Apply Function to Each Field of a Structure Array: Part 1
0, 2, 0, -2, 0, 2, 0, -2, ...
Spot the First Occurrence of 5
Generating random matrix with given probability mass function
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