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 mxPos = 0;

    for(int i=0; i<16; i++) {
        if((reg & (1<<i)) != 0) {
            mxPos = i;
            // printf("index %d \n",i);
        }
    }

    // printf("mxPos: %d\n", mxPos);
    for(int i=0; i<(mxPos); i++){
        reg &= ~(1U<<i);
    }

    return reg;
}

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

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

Solving Approach