Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum(int arr[], int n, int k) {
    // Your logic here
    // if we start to inspect windows of width k
    // then we can do it from element 0 to element (n-k)
    // 
    int i, j, sum;
    for (i=0; i <= (n-k); i++) {
        sum= 0;
        for (j=0; j < k; j++) {
            sum = sum + arr[i+j];
        }
        printf ("%d ", sum);
    }
    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

if we start to inspect windows of width k
then we can do it from element 0 to element (n-k)