33. Detect Circular Pattern Match

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    bool overflow;
    int i = 16;
    while (i--) {
        if (reg == target)
            return 1;
        overflow = (reg & (1 << 15)) ? true : false;
        reg <<= 1;
        if (overflow)
            reg |= 0x1;
    }
    return 0;
}

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