DCP-16: Mr. And Mrs. A Back to All Problems

Medium Search Techniques > Binary Search/Bisection


This is the story of Mr. and Mrs. A. They always love to play with integers. One day Mr. A asks Mrs. A to find any three integers X, Y, Z such that X = Y^Z (X, Y, Z>1). Mrs. A answers the question within 1 second. Mr. A wants to make the task harder for Mrs. A so Mr. A gives two more integers L, R. Now Mr. A asks find how many integers X, are present from L to R. Mrs. A never likes to loss to Mr. A. So Mrs. A seeks help from you. Can you do it for Mrs. A? Input: ------ First line gives an integer T (<=10^5), number of integers. Each line contains two integers L, R (1<=L<=R<=10^12) Output: ------- For every case, print case number and require answer. Look at sample output. Sample Input ------------ 2 4 9 10 20 Sample Output ------------- Case 1: 3 Case 2: 1 **Sample Input/output Explanation:** From 4 – 9 there are 3 numbers - 4 = 2^2, 8 = 2^3, 9 = 3^2 From 10 – 20 there is only one number – 16 = 2^4. 16 can also express as 16 = 4^2. But count for only once.


Problem Setter:

Shakil Ahmed

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Problem Limits

Language Time Limit (seconds)
C 3.00
C++ 3.00
C++14 3.00
C# 5.00
Go 5.00
Java 5.00
JavaScript 5.00
Objective-C 5.00
Perl 5.00
PHP 5.00
Python 5.00
Python3 5.00
Ruby 5.00
VB.Net 5.00

Problem Stats

38/135

Solve/Submission

Ranking

# User Language Timing
01 ssavi Cpp14 0.96s
02 seyedssz Cpp14 1.24s
03 jalal Cpp14 1.25s
04 atik Cpp 1.31s
05 rashedul007 Cpp 1.33s
06 bengal_tiger Cpp 1.35s
07 rajdipsaha Cpp 1.36s
08 haasib Cpp14 1.41s
09 sadia2427 Cpp14 1.41s
10 KNUTH Cpp14 1.47s
11 subhashis_cse Cpp14 1.47s
12 tariqiitju Cpp14 1.47s
13 anowar1112 Cpp14 1.47s
14 smriad Cpp14 1.48s
15 ammasum Cpp14 1.49s
16 ahqmrf Cpp14 1.49s
17 prantacse14 Cpp14 1.50s
18 hmtanbir Cpp14 1.50s
19 emrul Cpp14 1.56s
20 ProKawsar Cpp14 1.56s
21 AlaminJust Cpp14 1.57s
22 bishal_biswas Cpp14 1.59s
23 lightlessShadO Cpp14 1.60s
24 umli Cpp14 1.67s
25 Ishrak Cpp14 1.69s
26 dmehrab06 Cpp14 1.72s
27 sazal_dev Cpp14 2.79s
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