Keep Only the Highest Set Bit

Code

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

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



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

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

// 00010001
// 00010000

// 00011011
// 00011010

Solving Approach