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 reg=0U;
    for(int i=0;i<16;i++)
    {
        uint16_t mask=1U;
        if(i%2 ==0)
        {
            mask<<=i;
            if((mask & val) !=0){
                mask>>=(i/2);
                reg|=mask;
            }
        }
    }
    return reg;
}

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

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

Solving Approach