Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    if (k <= 0 || k > n) return ;

    int sum = 0;
    for(int i = 0 ; i < k; i++) sum += arr[i];
    
    for (int r = 0; r <= n - k ; r++)
    {
        printf("%d ", sum);
        sum += arr[r + k];
        sum -= arr[r]; 
    }

    
}

int main() {
    int n, k, arr[100];
    scanf("%d %d", &n, &k);
    for (int i = 0; i < n; i++) scanf("%d", &arr[i]);

    sliding_window_sum(arr, n, k);
    return 0;
}

Solving Approach