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Score : $300$ points

### Problem Statement

How many triples $A,B,C$ of integers between $L$ and $R$ (inclusive) satisfy $A-B=C$?

You will be given $T$ cases. Solve each of them.

### Constraints

• $1 \leq T \leq 2\times 10^4$
• $0\le L \le R \le 10^6$
• All values in input are integers.

### Input

Input is given from Standard Input in the following format:

$T$
$\text{case}_1$
$\vdots$
$\text{case}_T$


Each case is in the following format:

$L$ $R$


### Output

Print $T$ values; the $i$-th of them should be the answer for $\text{case}_i$.

### Sample Input 1

5
2 6
0 0
1000000 1000000
12345 67890
0 1000000


### Sample Output 1

6
1
0
933184801
500001500001


In the first case, we have the following six triples:

• $4 - 2 = 2$
• $5 - 2 = 3$
• $5 - 3 = 2$
• $6 - 2 = 4$
• $6 - 3 = 3$
• $6 - 4 = 2$