A13553. Are You Fired?
编程题
普及/提高-
知识点
题目描述
由于本场题面违反互联网相关法律，不予展示原题面。
输入格式
无
输出格式
无
输入输出样例
输入 #1
3 2 -1 2
输出 #1
2
输入 #2
5 2 2 -8 2
输出 #2
-1
输入 #3
6 -2 -2 6 -1
输出 #3
4
说明/提示
$2\le n\le 5\times 10^5,-10^9\le x,a_i\le 10^9$
In the first example, $k=2$ and $k=3$ satisfy: in the first case, Levian will report the numbers $1, 1$ , and in the second case — one number $3$ .
In the second example, there is no such $k$ .
In the third example, the only answer is $k=4$ : he will report the numbers $1,2,3$ .
In the first example, $k=2$ and $k=3$ satisfy: in the first case, Levian will report the numbers $1, 1$ , and in the second case — one number $3$ .
In the second example, there is no such $k$ .
In the third example, the only answer is $k=4$ : he will report the numbers $1,2,3$ .