Bad Prices

题意翻译

有一个物品销售了$n$天，第$i$天的售价为$c_i$。我们定义一天的售价是“不合算的”如果在他这一天后面的某一天中这个物品的售价小于这个物品这一天的售价。求有多少天的售价是“不合算的”。数据包含多测。 **输入：** 第一行，一个整数$T$$ (1 \leq T \leq 10^4)$，数据组数。 对于每组数据，第一行，一个整数$n$$ (1 \leq n \leq 150000)$，第二行，$n$个整数$c_1,c_2,\dots,c_n$$ (1 \leq c_i \leq 10^6)$。 **输出：** 对于每组数据，输出答案。

题目描述

Polycarp analyzes the prices of the new berPhone. At his disposal are the prices for $ n $ last days: $ a_1, a_2, \dots, a_n $ , where $ a_i $ is the price of berPhone on the day $ i $ . Polycarp considers the price on the day $ i $ to be bad if later (that is, a day with a greater number) berPhone was sold at a lower price. For example, if $ n=6 $ and $ a=[3, 9, 4, 6, 7, 5] $ , then the number of days with a bad price is $ 3 $ — these are days $ 2 $ ( $ a_2=9 $ ), $ 4 $ ( $ a_4=6 $ ) and $ 5 $ ( $ a_5=7 $ ). Print the number of days with a bad price. You have to answer $ t $ independent data sets.

输入输出格式

输入格式

The first line contains an integer $ t $ ( $ 1 \le t \le 10000 $ ) — the number of sets of input data in the test. Input data sets must be processed independently, one after another. Each input data set consists of two lines. The first line contains an integer $ n $ ( $ 1 \le n \le 150000 $ ) — the number of days. The second line contains $ n $ integers $ a_1, a_2, \dots, a_n $ ( $ 1 \le a_i \le 10^6 $ ), where $ a_i $ is the price on the $ i $ -th day. It is guaranteed that the sum of $ n $ over all data sets in the test does not exceed $ 150000 $ .

输出格式

Print $ t $ integers, the $ j $ -th of which should be equal to the number of days with a bad price in the $ j $ -th input data set.

输入输出样例

输入样例 #1

5
6
3 9 4 6 7 5
1
1000000
2
2 1
10
31 41 59 26 53 58 97 93 23 84
7
3 2 1 2 3 4 5

输出样例 #1

3
0
1
8
2