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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 ...
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C program to find the largest element in an array using simple iteration

Find Largest Element in Array - C Program

🔍 Find Largest Element in an Array (C Program)

#include<stdio.h>
int main( )
{
    int num,a[100];
    printf("Enter the size of the array:\n");
    scanf("%d",&num);
    if(num<=0)
    {
        printf("Invalid array size");
        return 1;
    }
    printf("Enter %d elements into the array:\n", num);
    for(int i=0;i<num;i++)
    {
        scanf("%d",&a[i]);
    }
    int max=a[0];
    for(int i=0;i<num;i++)
    {
        if(a[i]>max)
        {
            max=a[i];
        }
    }
    printf("The largest element in array is %d\n",max);
}

📘 Explanation:

🔹 The program first reads the size and elements of the array.
🔹 It initializes `max` with the first element.
🔹 Then it iterates through all elements and updates `max` whenever a larger value is found.
🔹 Finally, it prints the largest element.

🧪 Sample Output:

Enter the size of the array:
5
Enter 5 elements into the array:
10 45 23 89 34
The largest element in array is 89

🏷️ Keywords:

C program largest element, find max in array, array maximum value, beginner array program, C logic for max element

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