Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    int i, j;
    for (i = 0; i <= (n - k); i++) {
        int sum = 0;
        for (j = 0; j < k; j++) {
            sum += arr[i + j];
        }
        printf("%d", sum);
        if (i < n - 1)
            printf(" ");
        else
            printf("\n");
    }
}

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