Compress Interleaved Bits Reverse Bit Spreading

Code

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

uint8_t compress_bits(uint16_t val) {
    // Your logic here
    uint16_t mask   = 1;
    uint8_t  result = 0;
    for(int i = 0; i < 16; i+=2)
    {
        if(val & mask)
        {
            result |= ((uint8_t)1 << (i/2));
        }
        mask <<= 2;
    }
    return result;
}

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

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

Solving Approach