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/C++ 3.00
Java 5.00
C# 5.00
PHP 5.00

Problem Stats

17/46

Solve/Submission

Ranking

# User Language Timing
01 jalal Cpp 1.25s
02 KNUTH Cpp 1.47s
03 subhashis_cse Cpp 1.47s
04 tariqiitju Cpp 1.47s
05 anowar1112 Cpp 1.47s
06 ahqmrf Cpp 1.49s
07 prantacse14 Cpp 1.50s
08 ProKawsar Cpp 1.56s
09 Ishrak Cpp 1.69s
10 dmehrab06 Cpp 1.72s
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