题目描述
Read problem statements in [Mandarin], [Bengali], [Russian], and [Vietnamese] as well.
You are given an integer N. Consider the sequence containing the integers $1, 2, \ldots, N$ in increasing order (each exactly once). Find the maximum length of its contiguous subsequence with an even sum.
------ Input Format ------
- The first line of the input contains a single integer T denoting the number of test cases. The description of T test cases follows.
- The first and only line of each test case contains a single integer N.
------ Output Format ------
For each test case, print a single line containing one integer --- the maximum length of a contiguous subsequence with even sum.
------ Constraints ------
$1 ≤ T ≤ 10^{4}$
$2 ≤ N ≤ 10^{4}$
------ subtasks ------
Subtask #1 (100 points): original constraints
----- Sample Input 1 ------
3
3
4
5
----- Sample Output 1 ------
3
4
4
----- explanation 1 ------
Example case 1: The optimal choice is to choose the entire sequence, since the sum of all its elements is $1 + 2 + 3 = 6$, which is even.
Example case 3: One of the optimal choices is to choose the subsequence $[1, 2, 3, 4]$, which has an even sum.
输入格式
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输出格式
见题面