Compress Interleaved Bits Reverse Bit Spreading

Code

#include <stdio.h>
#include <stdint.h>

uint8_t compress_bits(uint16_t val) {
    // Your logic here
    uint8_t res = 0;
    volatile uint8_t i;

    for(i=0;i<8;i++){
        
        res |= ( (val&1) << i);

        val >>= 2;

    }
    return res;
}

int main() {
    uint16_t val;
    scanf("%hu", &val);

    uint8_t result = compress_bits(val);
    printf("%u", result);
    return 0;
}

Solving Approach

Declare a res variable

Loop 8 times 

check if the lsb of val is 1 and shift it by i, set that bit according to the positon

right shift the value by 2.

return res