Sliding Window Sum

Code

#include <stdio.h>

void sliding_window_sum_bruteforce(int arr[], int n, int k) {
    int ans = 0;
    int i=0;// actually arr traversal
    int j =0;// to keep track of the windwo
    int p =0;// to keep track of k values

    while(i+k <=n){
        while( p<k ){
            ans+= arr[j++];
            p++;
        }
        printf("%d ",ans);  
        j=i+1;
        p=0;
        i++;
        ans=0;
    }
}

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+= arr[i];
            sum-=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