Detect Circular Pattern Match

Code

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

uint16_t rotate_left(uint16_t x) {
    return (x << 1) | (x >> 15);
}

uint16_t rotate_right(uint16_t x) {
    return (x >> 1) | (x << 15);
}

uint8_t is_circular_match(uint16_t reg, uint16_t target) {

    uint16_t temp = reg;

    // check left rotations
    for(int i = 0; i < 16; i++) {
        if(temp == target) return 1;
        temp = rotate_left(temp);
    }

    temp = reg;
    // check right rotations
    for(int i = 0; i < 16; i++) {
        if(temp == target) return 1;
        temp = rotate_right(temp);
    }

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

Solving Approach