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Binary_Search
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Binary_Search
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//{ Driver Code Starts
// Initial template for C++
#include <bits/stdc++.h>
using namespace std;
// } Driver Code Ends
// User function template for C++
class Solution {
public:
int binarysearch(int arr[], int n, int k) {
// code here
int low = 0;
int high = n-1;
while(low<=high){
int mid = (low+high)/2;
if(arr[mid]==k){
return mid;
}
else if(k<arr[mid]){
high = mid-1;
mid = (low+high)/2;
}
else if(k>arr[mid]){
low = mid + 1;
mid = (low+high)/2;
}
}
return -1;
}
};
//{ Driver Code Starts.
int main() {
int t;
cin >> t;
while (t--) {
int N;
cin >> N;
int arr[N];
for (int i = 0; i < N; i++) cin >> arr[i];
int key;
cin >> key;
Solution ob;
int found = ob.binarysearch(arr, N, key);
cout << found << endl;
}
}
// } Driver Code Ends