Operator + and operator ^
Time Limit : 1 Second
Memory Limit : 128 MB
Submission: 498
Solved: 130
- Description
- Addition is written using the plus sign "+" between the terms; that is, in infix notation. The result is expressed with an equals sign. For example:
1 + 1 = 2 (verbally, "one plus one equals two")
2 + 2 = 4 (verbally, "two plus two equals four")
A bitwise exclusive or takes two bit patterns of equal length and performs the logical XOR operation on each pair of corresponding bits. The result in each position is 1 if the two bits are different, and 0 if they are the same. For example:
0101
XOR 0011
= 0110
In the C programming language family, the bitwise XOR operator is "^" (caret).
Now Mr. Y has two numbers P and Q, P = A + B and Q = A ^ B. Then Mr. Y asks you that how many combinations of nonnegative numbers (A, B). Notice that the combinations like (3, 2) and (2, 3) count as the same combination.
- Input
- In the first line, there is a single integer number T which means T test cases followed.
In the next T lines, every line contains a test case: two integers P and Q. You can assume that 0 <= p, q <= 1,000,000,000.
- Output
- For each test case, please output a single line with the number of the combinations.
- sample input
-
2 3 3 6 4
- sample output
-
2 1
- hint
- source