Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    uint16_t highest = -1;
    
    for(uint16_t i = 0; i<16; i++) {
        if ((reg >> i) & 1 == 1) {
            highest = i;
        }
    }
    return 1 << highest;
}

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

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

Solving Approach