Compress Interleaved Bits Reverse Bit Spreading

Code

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

uint8_t compress_bits(uint16_t val) {
    uint8_t result = 0;
    for (int i = 0; i < 8; i++) {
        uint8_t bit = (val >> (2 * i)) & 1;  // Extract bit from even position
        result |= (bit << i);               // Pack into result
    }
    return result;
}

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

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

Solving Approach