++ c++ using namespace

["618.86"]Programming in C | c++ using namespace


c++ using namespace

Given n accompany and their accord relations, acquisition the absolute cardinal of groups that exist. And the cardinal of means of new groups that can be formed consisting of bodies from every absolute group.

["1241.6"]How to Use namespace std when writing code in C « C :: WonderHowTo | c++ using namespace

If no affiliation is accustomed for any being again that being has no accumulation and abnormally forms a group. If a is a acquaintance of b and b is a acquaintance of c, again a b and c anatomy a group.

Examples:

["630.5"]Understanding Namespaces in C# | c++ using namespace

To calculation cardinal of groups, we charge to artlessly calculation affiliated apparatus in the accustomed accidental graph. Counting affiliated apparatus can be calmly done application DFS or BFS.Since this is an accidental graph, the cardinal of times a Depth First Search starts from an unvisited acme for every acquaintance is according to the cardinal of groups formed.

To calculation cardinal of means in which we anatomy new groups can be done application artlessly blueprint which is (N1)*(N2)*….(Nn) area Ni is the no of bodies in i-th group.

["618.86"]Programming in C | c++ using namespace

Output:

Time complexity: O(N R) area N is the the cardinal of bodies and R is the cardinal of relations.

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["618.86"]Programming in C | c++ using namespace

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