33. Detect Circular Pattern Match

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    uint16_t regR = reg;
    uint16_t regL = reg;
    for(int i=0;i<16;i++){
        if((regR == target)||(regL == target)) return 1;
        regR = (regR << 1 | regR >> (16-1));
        regR &= 0xFFFF;
        regL = (regL >> 1 | regL << (16-1));
        regL &= 0xFFFF;

    }
    return 0;
}

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