Description

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Implement a Vector class that support n-dimensional vector add, subtract and dot product.

Your task is to complete

• const int size() const;
• Vector operator+(const Vector& a);
• Vector operator-(const Vector& a);
• const int operator[](int index) const;
• int operator*(const Vector& a);

inside the Vector class, and std::ostream& operator<<(std::ostream& os, const Vector& v);

Remember to #include "function.h"!

Input

First line of input is an integer m, where m is the number of testcases.There are m testcases following.

A testcases consists of three lines:

• In the first line of each testcase, there are a string OP and an integer n, where OP is the operation and n is the vector size.
• In the second line of each testcase, there are n integers, representing all the elements inside the first vector, A.
• In the third line of each testcase, there are n integers, representing all the elements inside the second vector, B.

It is guaranteed that:

• 1 ≤ m ≤ 100, 1 ≤ n ≤ 300
• For all the elements x in vector A and B, |x| ≤ 100

Output

For each testcase, according to its operation, output the result of A+B, A-B or A*B. There is a space after every number.

Sample Input  Download

Sample Output  Download

Partial Judge Code

11915.cpp

Partial Judge Header

11915.h

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