2017微软秋招A题

时间限制:10000ms

单点时限:1000ms

内存限制:256MB

描述

There is an integer array A1, A2 ...AN. Each round you may choose two adjacent integers. If their sum is an odd number, the two adjacent integers can be deleted.

Can you work out the minimum length of the final array after elaborate deletions?

输入

The first line contains one integer N, indicating the length of the initial array.

The second line contains N integers, indicating A1, A2 ...AN.

For 30% of the data：1 ≤ N ≤ 10

For 60% of the data：1 ≤ N ≤ 1000

For 100% of the data：1 ≤ N ≤ 1000000, 0 ≤ Ai ≤ 1000000000

输出

One line with an integer indicating the minimum length of the final array.

样例提示

(1,2) (3,4) (4,5) are deleted.

样例输入

7
1 1 2 3 4 4 5

样例输出

1


题解：此题有一点需注意，删除后的元素不影响周围的元素(例如删除23元素，14元素就变得相邻了)
法1.理解了这一点，用个栈或向量直接两两判断
法2.由于奇数与偶数和才为奇数，奇数偶数成对消除，所以本题目可以用奇数与偶数的差的绝对值直接计算。