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 k = 0;
    uint8_t retval = 0;
    for(uint8_t i=0; i<15; i += 2)
    {
       retval |= (((val>>i) & 0x1) << k);
       k++;
    }
    return retval;
}

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

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

Solving Approach