The cows have opened a new business, and Farmer John wants to see how well they are doing. The business has been running for N (1 <= N <= 100,000) days, and every day i the cows recorded their net profit (-1,000 <= <= 1,000).
Farmer John wants to find the largest total profit that the cows have made during any consecutive time period. (Note that a consecutive time period can range in length from one day through N days.) Help him by writing a program to calculate the largest sum of consecutive profits.

* Line 1: A single integer: N
* Lines 2..N+1: Line i+1 contains a single integer: 

* Line 1: A single integer representing the value of the maximum sum of profits for any consecutive time period.

7 
-3 
4 
9 
-2 
-5 
8 
-3 

14

The maximum sum is obtained by taking the sum from the second through the sixth number (4, 9, -2, -5, 8) => 14.