Compress Interleaved Bits Reverse Bit Spreading

Code

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

uint8_t compress_bits(uint16_t val) {
    int n=0;
    uint8_t res=0;
    for(int i=0; i<16; i+=2)
    {
        uint8_t bit = ((val >>i) & 1);
        res |= bit << n;
        n++;
    }
    return res;
}

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

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

Solving Approach