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 P_i (-1,000 <= P_i <= 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: P_i

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