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Solve LeetCode 3 Longest Substring Without Repeating Characters in C++ using the sliding window

Longest Substring Without Repeating Characters in C++ LeetCode 3 · sliding window · last index array Table of Contents Problem Statement Approach Algorithm C++ Program Input Sample Output Output Explanation Dry Run Flow of Execution Time Complexity Space Complexity Applications Key Points Interview Questions Frequently Asked Questions Conclusion Problem Statement 3. Longest Substring Without Repeating Characters Given a string s , find the length of the longest substring that contains no repeating characters. A substring is a continuous part of the string, so "pwke" is a subsequence of "pwwkew" but not a substring. Approach We use a sliding window . The window is the part of the string between start and end , and we always keep it free of repeated characters. An array lastIndex of size 128 remembers the most recent position of every ASCII ...

Count Elements Greater Than All Prior Elements

Count Elements Greater Than All Prior Elements

✅ Count Elements Greater Than All Prior Elements

Given an integer array Arr of size N the task is to find the count of elements whose value is greater than all of its prior elements.

Note : 1st element of the array should be considered in the count of the result.

For example,

Arr[]={7,4,8,2,9}

As 7 is the first element, it will consider in the result.

8 and 9 are also the elements that are greater than all of its previous elements.

Since total of  3 elements is present in the array that meets the condition.

Hence the output = 3.
  

Example 1:

Input 

5 -> Value of N, represents size of Arr

7-> Value of Arr[0]

4 -> Value of Arr[1]

8-> Value of Arr[2]

2-> Value of Arr[3]

9-> Value of Arr[4]

Output :

3
  

Example 2:

5   -> Value of N, represents size of Arr

3  -> Value of Arr[0]

4 -> Value of Arr[1]

5 -> Value of Arr[2]

8 -> Value of Arr[3]

9 -> Value of Arr[4]

Output : 

5
  

Constraints

1<=N<=20

1<=Arr[i]<=10000
  

#include <stdio.h>

int main()
{
    int n;
    printf("Enter the size of array: ");
    scanf("%d", &n);

    int arr[n];

    printf("Enter array elements:\n");
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &arr[i]);
    }

    int count = 1;           // First element is always counted
    int max = arr[0];

    for (int i = 1; i < n; i++)
    {
        if (arr[i] > max)
        {
            count++;
            max = arr[i];
        }
    }

    printf("Output: %d\n", count);

    return 0;
}
  

๐Ÿ“Œ Hashtags:

#CProgramming #Array #ProblemSolving #CodingInterview #1printf

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