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 flag = 0;
    int found = 0;
    for(int i = 15; i >= 0;i--){
        if(reg & (1 << i) && flag == 0 && found == 0){
            flag = 1;
            found = 1;
        } 
        if(flag == 0){
            reg &= ~(1 << i);
        }
        flag = 0;
    }
    return reg;
}

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

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

Solving Approach