Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    int window_sum = 0;
    // initial window sum
    for(int i=0;i<k;i++){
        window_sum+=arr[i];
    }
    printf("%d ",window_sum);
    int l=0;
    for(int r=k;r<n;r++){
        window_sum = window_sum - arr[l] + arr[r];
        l++;
        printf("%d ",window_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