can not understand the Editorial.(Second Part).

Problem : Gravity Tree

Editorial: Editorial

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Problem: Tree Edges Coloring

Can anyone give me the solution approach in details please.

Thanks in advance.

Problem: Pairs Forming LCM

can anyone give me any idea to solve the problem

with the mathematical proof.

Problem: 1846. GCD 2010

Verdict: WA

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Code: CODE

Problem: Light OJ — Lining up Students

can anyone give me any idea

how can i solve this problem with Binary Index Tree or Segment Tree???

Problem: A simple task

can anyone give me any idea to solve the problem

with the mathematical proof

Problem: Walls of the North

can not understand the solution in editorial

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Problem: 610D - Вика и отрезки

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Problem: 312B - Лучники

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Problem: 453A - Little Pony and Expected Maximum

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Problem:

A certain strange mathematician, Rasyak, considers a particular set of prime numbers beautiful. He also calls a composite number beautiful, if it is divisible by at least one prime number in his chosen set of beautiful primes. Given Rasyak’s set of M beautiful primes and an integer N, you have to find the number of beautiful numbers (both primes and composites) between 1 and N. For example, given a set of 2 beautiful primes, {2, 5}, there are 6 beautiful numbers between 1 and 10 (i.e. 2, 4, 5, 6, 8 and 10).

Input

The first line of the input gives the number of test cases, T (1 <= T <= 100). T test cases follow. Each will consist of one line containing a single integer M, followed by a line containing M space-separated prime numbers mi, followed by another line containing a single integer N.

1 <= M <= 25

1 <= mi <= 1000

1 <= N <= 2*10^9

Output

For each test case, output one line containing a single integer X, where X is the number of beautiful numbers between 1 and N.

Input

3

2
2 5
10

3
2 5 13
100

25
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
2000000000

Output

6

63

1759360857

How can i solve this problem???

any idea????

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problem: Shil and Wave seqeunce

can anyone give me any idea for this problem.

Problem: The Great Ball

Problem: Largest Rectangle in a Histogram

Verdict: WA

can not get the problem

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code: CODE

can anyone give me any idea for this problem.

Problem: Election Posters

C Language (সি প্রোগ্রামিং শেখার বিভিন্ন লিংক)

সুবিন স্যার এর বই

শিক্ষক ডট কম এর কোর্স

C++ STL (সি++ STL শেখার বিভিন্ন লিংক)

cplusplus.com

প্রোগক্রিয়া

হাবিজাবি হিজিবিজবিজ

PRIORITY QUEUE

GRAPH THEORY (গ্রাফথিওরি)

BFS

BFS-1

DFS

DFS-1

DFS-2

Minimum Spanning Tree(MST)

MST-1

MST-2

MST-3

Bipartite Graph Check

Bipartite Graph Check-1

Bipartite Graph Check-2

Topological Sort

Topological Sort-1

Topological Sort-2

Topological Sort-3

DIJKSTRA

DIJKSTRA-1

DIJKSTRA-2

DIJKSTRA-3

DIJKSTRA-4

Maximum Flow / Min Cut

Maximum Flow-1

Maximum Flow-2

Maximum Flow-3

Maximum Flow-4

Maximum Flow-5

STRING

KMP

Z Algorithm

Aho-Corasick

Aho-Corasick

Suffix Array

Trie

Problem: 295A - Greg and Array

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Problem: 383A - Milking cows

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Problem: 383A - Milking cows

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Problem: 158C - Команды cd и pwd

Verdict: WA

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code: 10699164

problem: (http://www.spoj.com/problems/MATSUM/)

code: (http://ideone.com/4cPZi4)

Verdict: WA

can not get why WA.

please help...