33. Detect Circular Pattern Match

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

uint16_t rotate(uint16_t reg, uint8_t n) {
    return (reg >> n) | (reg << (16 - n));
}

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    for (int i = 0; i < 16; i++) {
        uint16_t rotated = rotate(reg, i);
        if ((rotated ^ target) == 0) {
            return 1;
        }
    }
    return 0;
}

int main() {
    uint16_t reg, target;
    scanf("%hu %hu", &reg, &target);
    printf("%hhu", is_circular_match(reg, target));
    return 0;
}