# Problem 57829. Convert vector of strings to lower triangular matrix

Given a non-empty vector vec of strings, please put its elements into the lower triangular half of a square matrix M column-wise. The remaining elements of M, those not filled this way, should contain empty strings, "".
For example, given
seq = [ "a" "b" "c" ]
M = [
"a" ""
"b" "c"
]
while for
seq = strsplit("I like wine, and I like cheese, I like the smell of a westerly breeze.")
it should return
M = [
"I" "" "" "" ""
"like" "like" "" "" ""
"wine," "cheese," "the" "" ""
"and" "I" "smell" "a" ""
"I" "like" "of" "westerly" "breeze."
]
The number of elements of vec is not restricted (other than being positive), BTW, so e.g.
seq = [ "a" "b" "c" "d" ]
should yield
M = [
"a" "" ""
"b" "d" ""
"c" "" ""
]
P.S. the test suite will not check for cheating, but please be a good sport.

### Solution Stats

37.5% Correct | 62.5% Incorrect
Last Solution submitted on Apr 10, 2024

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