Compress Interleaved Bits Reverse Bit Spreading

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

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

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

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