Lucky Numbers Again | CodeChef

Lucky Numbers Again

Problem code: RUBIX5

All submissions for this problem are available.

A lucky number N is defined as a number which has only two factors, both of them distinct and prime and the absolute difference between the two factors is not more than 50.

Given two integers, a and b, find the total lucky numbers in the range a to b (inclusive).

Input

1.The first input will be T, the number of test-cases. T <= 2000. T lines follow, one for each test case.

2.For each test case there are two integers a and b on each line. 1 <= a <= b <= 100000

Output

For every test case, print the number of lucky numbers from a to b (inclusive).

Example

Input:
1
1 20

Output:
4

Explanation
From 1 to 20, there are four lucky numbers, 6,10, 14, and 15.
Author: csirubix
Tags csirubix
Date Added: 13-02-2010
Time Limit: 0.241463 sec
Source Limit: 50000 Bytes
Languages: C, CPP14, JAVA, PYTH, PYTH 3.5, PYPY, CS2, PAS fpc, PAS gpc, RUBY, PHP, GO, NODEJS, HASK, rust, SCALA, swift, D, PERL, FORT, WSPC, ADA, CAML, ICK, BF, ASM, CLPS, PRLG, ICON, SCM qobi, PIKE, ST, NICE, LUA, BASH, NEM, LISP sbcl, LISP clisp, SCM guile, JS, ERL, kotlin, PERL6, TEXT, SCM chicken, CLOJ, COB, FS


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