Sliding Window Sum

Code

#include <stdio.h>

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

    for(int i = k ; i <n ; i++){
        sum+=a[i] -a[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