114. Little Endian to Big Endian

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

uint32_t convert_endian(uint32_t value) {

 // Mask (0xFF) ensures only the target byte is shifted, avoiding overflow
    return ((value >> 24) & 0x000000FF) | // Byte 3 -> Byte 0 in output
           ((value >> 8)  & 0x0000FF00) | // Byte 2 -> Byte 1
           ((value << 8)  & 0x00FF0000) | // Byte 1 -> Byte 2
           ((value << 24) & 0xFF000000);  // Byte 0 -> Byte 3
}

int main() {
    uint32_t val;
    scanf("%u", &val);
    printf("%u", convert_endian(val));
    return 0;
}