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 compressed_val = 0;
    for (uint8_t index = 16; index > 0; index -= 2) {
        compressed_val <<= 1;
        compressed_val |= ((val >> (index - 2)) & 1);
    }
    return compressed_val;
}

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

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

Solving Approach