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Module DEMO-32-106DEMO-C-32

Check if Array is Sorted

DEMO-C-32 • Programming in C

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Problem Statement

Write a C program to check if a 1D array is sorted in ascending order. The array is sorted if every element is less than or equal to the next element. Output "YES" if sorted, otherwise "NO".

Example 1

Input:

5 1 2 3 4 5

Output:

YES

Example 2

Input:

5 1 3 2 4 5

Output:

NO

Constraints

1 <= n <= 100

Input Format

n followed by elements

Output Format

YES or NO

Sample Testcases

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Sample #1
Public sample
Input
5
1 2 3 4 5
Output
YES
Explanation
Strictly ascending.
Sample #2
Public sample
Input
5
1 3 2 4 5
Output
NO
Explanation
3 > 2, so not sorted.
Sample #3
Public sample
Input
1
100
Output
YES
Explanation
Single element is trivially sorted.
Sample #4
Public sample
Input
5
1 1 1 1 1
Output
YES
Explanation
Duplicates allow equality.

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