Compress Interleaved Bits Reverse Bit Spreading

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

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

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

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