Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
	if (reg == 0) return 0;
	
    for (uint16_t i = (1U << 15); i > 0; i >> 1) {
        if ((reg & i) != 0) {
            return (1 << i);
        }
    }
}

int main() {
    uint16_t reg;
    scanf("%hu", &reg);

    uint16_t result = highest_set_bit(reg);
    printf("%hu", result);
    return 0;
}

Solving Approach