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
    unsigned int res = 0;
    for (unsigned int left = 16; left > 0 ; left--){
        if (reg & (1 << left)){
            res = 1 << left;
            break;
        }
    }
    return res;
}

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

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

Solving Approach