Reverse an ArrayWrite a program to reverse the elements of an array of integers.Constraints:NAExample:Sample Input:512345Sample Output:5 4 3 2 1 Explanation:First line of input--> size of array (n) -->5n lines of integers into the array-->1 2 3 4 5Output--> Reversed array --> 5 4 3 2 1Public Test Cases:# INPUT EXPECTED OUTPUT1 5123455 4 3 2 1
Question
Reverse an ArrayWrite a program to reverse the elements of an array of integers.Constraints:NAExample:Sample Input:512345Sample Output:5 4 3 2 1 Explanation:First line of input--> size of array (n) -->5n lines of integers into the array-->1 2 3 4 5Output--> Reversed array --> 5 4 3 2 1Public Test Cases:# INPUT EXPECTED OUTPUT1 5123455 4 3 2 1
Solution
Here is a step-by-step guide to solve this problem:
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First, we need to read the size of the array. This is given as the first line of input.
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Next, we need to read the elements of the array. These are given as the next n lines of input, where n is the size of the array.
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Once we have the array, we can reverse it. There are many ways to do this, but one simple method is to use two pointers: one at the start of the array and one at the end. We swap the elements at these two positions, then move the pointers towards each other and repeat until they meet in the middle.
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Finally, we print the reversed array.
Here is a Python code snippet that implements these steps:
# Read the size of the array
n = int(input())
# Read the elements of the array
arr = []
for _ in range(n):
arr.append(int(input()))
# Reverse the array
start = 0
end = n - 1
while start < end:
# Swap the elements at the start and end positions
arr[start], arr[end] = arr[end], arr[start]
# Move the pointers towards each other
start += 1
end -= 1
# Print the reversed array
for num in arr:
print(num, end=' ')
This program reads the size of the array and its elements, reverses the array, and then prints the reversed array.
Similar Questions
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