thank you for the comment. i have naver thought about possible stack corruption in such case

such tasks are my weakness. enjoied a lot :)

why do we have 'auto' here? it is useless in C

debugging this was a hell...

checking a string length after the loop is not very good. You may receive a string with thousands of symbols. Then iterate over it in the loop. An then you will discard all the work done because length is invalid

it is better to avoid using floats whenever it is possible

Just my lucky guess. Because of test cases count and description. But I don't understand why it is works so. Can anybody explain me? :)

and no floats :)

short and simple soluion. I liked it very much

nice solution, but will fail for leading speces of for 2+ spaces in sequence

you don't need to check if it letter, while iterating over input string. This will make your code much faster and more compact :)

1. use calloc instead of malloc+memset(0).
2. names and values are better to put in some "pair" struct
3. loop iterations max better to get from array size.

But I like your solution very much) This is many times better then one I write

what about free ? :)
also in C99 you are allowed to create arrays in runtime with no predefined size. You don't need malloc for arr