Detect Circular Pattern Match

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    // Your code here
    if(reg == target){
        return 1;
    }
    uint8_t n = 1;
    while(n <= 16){
        uint32_t mask = (1 << 1) - 1;
        uint32_t check = reg & mask;
        check <<= 16 - 1;
        reg = (reg >> 1) + check;
        if(reg == target){
            return 1;
        }
        n++;
    }
    return 0;
}

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