Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    int i = 0;
    uint16_t mask = 1U;
    uint16_t temp = reg;
    while (temp >>= 1) { 
        i++;
        if (temp & 1U) mask = 1U << i;
    }
    return reg & mask;
}

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

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

Solving Approach