Obfuscated C about fh-250-puzzles HOT 4 CLOSED

It converts the first argument, an integer, into 8 bit binary.
Numbers 0 and 256 convert to 00000000.
Negative numbers convert to 11111111.

Executing without arguments will give a Segmentation fault (core dumped) error.
Compilation generates a warning, which can be ignored.

prog.c:1:68: warning: unsafe pointer arithmetic [-Wunsafe-buffer-usage]
    1 | int main(int b,char**i){long long n=B,a=I^n,r=(a/b&a)>>4,y=atoi(*++i),_=(((a^n/b)*(y>>T)|y>>S)&r)|(a^r);printf("%.8s\n",(char*)&_);}
      |                                                                    ^
1 warning generated.

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It converts a non-negative integer x to the binary representation of x % 256.
It converts a negative integer to 11111111
It converts an integer and any character separated with whitespace (e.g. ./prog 3 randomstuff) to 30"31331

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With a non-zero argument input, the code returns 8 characters, based on the flow seen in the image.

With zero arguments, it throws a segmentation fault.

argc represents the number of arguments passed to the program. atoi(argv[1]) converts the argument (string) to an integer

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Unfortunately, we could not figure this out too.

There are some hints here that emphasise certain binary operations.

There is a trace of the math here.

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