A13985. Cleaning the Phone
编程题
普及/提高-
知识点
题目描述
Polycarp often uses his smartphone. He has already installed $n$ applications on it. Application with number $i$ takes up $a_i$ units of memory.
Polycarp wants to free at least $m$ units of memory (by removing some applications).
Of course, some applications are more important to Polycarp than others. He came up with the following scoring system — he assigned an integer $b_i$ to each application:
- $b_i = 1$ — regular application;
- $b_i = 2$ — important application.
According to this rating system, his phone has $b_1 + b_2 + \ldots + b_n$ convenience points.
Polycarp believes that if he removes applications with numbers $i_1, i_2, \ldots, i_k$ , then he will free $a_{i_1} + a_{i_2} + \ldots + a_{i_k}$ units of memory and lose $b_{i_1} + b_{i_2} + \ldots + b_{i_k}$ convenience points.
For example, if $n=5$ , $m=7$ , $a=[5, 3, 2, 1, 4]$ , $b=[2, 1, 1, 2, 1]$ , then Polycarp can uninstall the following application sets (not all options are listed below):
- applications with numbers $1, 4$ and $5$ . In this case, it will free $a_1+a_4+a_5=10$ units of memory and lose $b_1+b_4+b_5=5$ convenience points;
- applications with numbers $1$ and $3$ . In this case, it will free $a_1+a_3=7$ units of memory and lose $b_1+b_3=3$ convenience points.
- applications with numbers $2$ and $5$ . In this case, it will free $a_2+a_5=7$ memory units and lose $b_2+b_5=2$ convenience points.
Help Polycarp, choose a set of applications, such that if removing them will free at least $m$ units of memory and lose the minimum number of convenience points, or indicate that such a set does not exist.
Polycarp wants to free at least $m$ units of memory (by removing some applications).
Of course, some applications are more important to Polycarp than others. He came up with the following scoring system — he assigned an integer $b_i$ to each application:
- $b_i = 1$ — regular application;
- $b_i = 2$ — important application.
According to this rating system, his phone has $b_1 + b_2 + \ldots + b_n$ convenience points.
Polycarp believes that if he removes applications with numbers $i_1, i_2, \ldots, i_k$ , then he will free $a_{i_1} + a_{i_2} + \ldots + a_{i_k}$ units of memory and lose $b_{i_1} + b_{i_2} + \ldots + b_{i_k}$ convenience points.
For example, if $n=5$ , $m=7$ , $a=[5, 3, 2, 1, 4]$ , $b=[2, 1, 1, 2, 1]$ , then Polycarp can uninstall the following application sets (not all options are listed below):
- applications with numbers $1, 4$ and $5$ . In this case, it will free $a_1+a_4+a_5=10$ units of memory and lose $b_1+b_4+b_5=5$ convenience points;
- applications with numbers $1$ and $3$ . In this case, it will free $a_1+a_3=7$ units of memory and lose $b_1+b_3=3$ convenience points.
- applications with numbers $2$ and $5$ . In this case, it will free $a_2+a_5=7$ memory units and lose $b_2+b_5=2$ convenience points.
Help Polycarp, choose a set of applications, such that if removing them will free at least $m$ units of memory and lose the minimum number of convenience points, or indicate that such a set does not exist.
输入格式
The first line contains one integer $t$ ( $1 \le t \le 10^4$ ) — the number of test cases. Then $t$ test cases follow.
The first line of each test case contains two integers $n$ and $m$ ( $1 \le n \le 2 \cdot 10^5$ , $1 \le m \le 10^9$ ) — the number of applications on Polycarp's phone and the number of memory units to be freed.
The second line of each test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^9$ ) — the number of memory units used by applications.
The third line of each test case contains $n$ integers $b_1, b_2, \ldots, b_n$ ( $1 \le b_i \le 2$ ) — the convenience points of each application.
It is guaranteed that the sum of $n$ over all test cases does not exceed $2 \cdot 10^5$ .
The first line of each test case contains two integers $n$ and $m$ ( $1 \le n \le 2 \cdot 10^5$ , $1 \le m \le 10^9$ ) — the number of applications on Polycarp's phone and the number of memory units to be freed.
The second line of each test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^9$ ) — the number of memory units used by applications.
The third line of each test case contains $n$ integers $b_1, b_2, \ldots, b_n$ ( $1 \le b_i \le 2$ ) — the convenience points of each application.
It is guaranteed that the sum of $n$ over all test cases does not exceed $2 \cdot 10^5$ .
输出格式
For each test case, output on a separate line:
- -1, if there is no set of applications, removing which will free at least $m$ units of memory;
- the minimum number of convenience points that Polycarp will lose if such a set exists.
- -1, if there is no set of applications, removing which will free at least $m$ units of memory;
- the minimum number of convenience points that Polycarp will lose if such a set exists.
输入输出样例
输入 #1
5 5 7 5 3 2 1 4 2 1 1 2 1 1 3 2 1 5 10 2 3 2 3 2 1 2 1 2 1 4 10 5 1 3 4 1 2 1 2 4 5 3 2 1 2 2 1 2 1
输出 #1
2 -1 6 4 3
说明/提示
In the first test case, it is optimal to remove applications with numbers $2$ and $5$ , freeing $7$ units of memory. $b_2+b_5=2$ .
In the second test case, by removing the only application, Polycarp will be able to clear only $2$ of memory units out of the $3$ needed.
In the third test case, it is optimal to remove applications with numbers $1$ , $2$ , $3$ and $4$ , freeing $10$ units of memory. $b_1+b_2+b_3+b_4=6$ .
In the fourth test case, it is optimal to remove applications with numbers $1$ , $3$ and $4$ , freeing $12$ units of memory. $b_1+b_3+b_4=4$ .
In the fifth test case, it is optimal to remove applications with numbers $1$ and $2$ , freeing $5$ units of memory. $b_1+b_2=3$ .
In the second test case, by removing the only application, Polycarp will be able to clear only $2$ of memory units out of the $3$ needed.
In the third test case, it is optimal to remove applications with numbers $1$ , $2$ , $3$ and $4$ , freeing $10$ units of memory. $b_1+b_2+b_3+b_4=6$ .
In the fourth test case, it is optimal to remove applications with numbers $1$ , $3$ and $4$ , freeing $12$ units of memory. $b_1+b_3+b_4=4$ .
In the fifth test case, it is optimal to remove applications with numbers $1$ and $2$ , freeing $5$ units of memory. $b_1+b_2=3$ .