Time limit: 5000ms
Memory limit: 256mb

Description:
Given an array A of positive integers and an integer number K, please find the shortest subarray whose sum of each elements is not smaller than K, and return its length. 
You need to design an efficient algorithm with a O(n) time complexity. Otherwise, you may exceed the time limit. 

-----------------------Copy the following code, complete it and submit-----------------------

/*
I, <Your Full Name>, am submitting the assignment for
an individual project.
I declare that the assignment here submitted is original except for
source material explicitly acknowledged, the piece of work, or a part
of the piece of work has not been submitted for more than one purpose
(i.e. to satisfy the requirements in two different courses) without
declaration. I also acknowledge that I am aware of University policy
and regulations on honesty in academic work, and of the disciplinary
guidelines and procedures applicable to breaches of such policy and
regulations, as contained in the University website
http://www.cuhk.edu.hk/policy/academichonesty/.
It is also understood that assignments without a properly signed
declaration by the student concerned will be graded as zero by the
teacher(s).
*/

#include <stdio.h>
#include <stdlib.h>

#define MAX_LEN 1024 * 1024
#define MAX_QUERIES 10240

int shortest_subarray(int a[], int n, int k) {
  // WRITE YOUR CODE HERE
}

// DO NOT MODIFY THE CODE BELOW
int main() {

  int n, i;
  int Q;
  int result;
  int *a = (int *)malloc(MAX_LEN * sizeof(int));
  int Ks[MAX_QUERIES];

  scanf("%d", &n);
  scanf("%d", &Q);

  for (i = 0; i < n; i++)
    scanf("%d", &a[i]);
  for (i = 0; i < Q; i++)
    scanf("%d", &Ks[i]);

  for (i = 0; i < Q; i++) {
    result = shortest_subarray(a, n, Ks[i]);
    printf("%d\n", result);
  }
  free(a);
  return 0;
}
-----------------------------------------End of Code-----------------------------------------

Input:
First line consists of two integers N and Q;
Second line is an array A of N positive integers;
Then Q lines follows: each of them is a target value K;
0 <= N <= 10^6, 0 <= Q <= 10^5

Output:
Q lines: the i-th line is the length of the shortest subarray for the i-th K
If there exist no subarray with sum at least K, return 0.

Sample Input 1:
6 1
1 2 3 4 1 2
6

Sample Output 1:
2

Sample Input 2:
4 1
1 1 1 1
5

Sample Output 2:
0