Time Limit : 15 Second
Memory Limit : 128 MB
Submission: 1247
Solved: 71
Description
Given an integer array, how will you find out the increasing subsequence which gives the largest sum. For example,
4, 2, 1, 5, 3
in this subsequence a few possible increasing subsequences are
1) 4
2) 2
3) 1
4) 5
5) 3
6) 4, 5
7) 2, 5
8) 2, 3
9) 1, 5
10) 1, 3

but 4, 5 gievs the maximum sum.

Your task is how to find such the maximum sum in a given integer array.
Input
Multiply Cases, For each case:
The first line contains N(0< N <=1000000), which is the number of the integer array.
The second line contains N integer numbers not exceeding 2000000 by the absolute value.
Output
For each case, output only one integer, which is the maximum sum of increasing subsequences.

sample input
5
4 2 1 5 3
sample output
9
hint
source
ACman
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