Detect Circular Pattern Match

Code

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    for (int i = 0; i < 16; i++) {
        // Rotate reg left by i
        uint16_t rotated = (reg << i) | (reg >> (16 - i));
        if (rotated == target) {
            return 1;  // match found
        }
    }
    return 0; // no match
}

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

Solving Approach