Detect Circular Pattern Match

Code

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    // Your code here
    uint32_t ext = ((uint32_t)reg << 16) | reg;

    for (int k = 0; k < 16; k++) {
        uint16_t rot = (ext >> k) & 0xFFFF;
        if (rot == target)
            return 1;
    }
    return 0;
}



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

Solving Approach