33. Detect Circular Pattern Match

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
   int ex;
   int n = 15;
   uint16_t temp;
   temp = reg;
   //left rotation
   while(n){
    ex = temp & 0x8000;
    temp = temp << 1;
    if(ex) temp |= 0x0001;
    else temp |= 0x0000;
    if(temp == 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;
}