Question

Given a sorted array A with distinct values which has been rotated r times to the left. Find r in least possible time. Provide python source code, time complexity, and pseudocode.

Input: The sorted array ? that has been rotated r times to the left.

Output: The value and ?.

Answer #1

```
arr = [1, 2, 3, 4, 5];
#n determine the number of times an array should be rotated
n = 3;
#Displays original array
print("Original array: ");
for i in range(0, len(arr)):
print(arr[i]),
#Rotate the given array by n times toward left
for i in range(0, n):
#Stores the first element of the array
first = arr[0];
for j in range(0, len(arr)-1):
#Shift element of array by one
arr[j] = arr[j+1];
#First element of array will be added to the end
arr[len(arr)-1] = first;
print();
#Displays resulting array after rotation
print("Array after",n ,"left rotation: " );
for i in range(0, len(arr)):
print(arr[i]),
```

**Time Complexity :- O(n);**

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