107. Binary Search in Sorted Array

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

int binary_search(uint8_t *arr, uint8_t n, uint8_t key) {
    // Your logic here
    int start=0;
    int end=n;
    
    while(start<end){
        int mid = start + (end-start)/2;
        if(arr[mid]==key){
            return mid;
        }else if(arr[mid]<key){
            start= mid+1;
        }else{
            end= mid-1;
        }
    }
    return -1;
}

int main() {
    uint8_t n, key;
    scanf("%hhu", &n);
    uint8_t arr[100];

    for (uint8_t i = 0; i < n; i++) {
        scanf("%hhu", &arr[i]);
    }
    scanf("%hhu", &key);

    int index = binary_search(arr, n, key);
    printf("%d", index);
    return 0;
}