Sliding Window Sum

Code

#include <stdio.h>

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

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