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How to Create a Set of Sets in C++?

How to Create a Set of Vectors in C++?

Last Updated : 22 Feb, 2024

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In C++, a set is a type of associative container in which duplicate elements are not allowed and a vector is a dynamic array in which duplicate elements are allowed. In this article, we will learn how to create a set of vectors in C++.

For Example,

Input:
vector<int> vec1={1, 2, 3};
vector<int> vec2={4, 5, 6};
vector<int> vec3={1, 2, 3};Output:
Set Elements are:
{1 2 3}
{4 5 6}

Declaring a Set of Vectors in C++

To create a set of vectors, first declare a std::set with std::vector<dataType> as its template parameter and then add the vectors to the set using set::insert() method.

Syntax to Declare Set of Vectors in C++

set<vector<datatype>> setOfVector;

In the above set, each element will be a vector of type 'datatype'

C++ Program to Create a Set of Vectors

C++

// C++ program to create set for vectors  #include <iostream> #include <set> #include <vector> using namespace std;  int main() {      // Creating set of vectors     // that will store each vector     set<vector<int> > st;      // Initializing vectors     vector<int> vec1{ 1, 2, 3 };     vector<int> vec2{ 4, 5, 6 };     vector<int> vec3{ 1, 2, 3 };      // Inserting the above vectors into the set     st.insert(vec1);     st.insert(vec2);     st.insert(vec3);      // Iterating and printing vectors from the set     cout << "Set Elements are: " << endl;     for (auto& it : st) {         for (int elem : it) {             cout << elem << " ";         }         cout << endl;     }      return 0; }

Output

Set Elements are:   1 2 3   4 5 6

Time Complexity: O(N * M log N), here N is the number of vectors in the set and M is the average size of the vectors.
Auxiliary Space: O(N * M)

How to Create a Set of Sets in C++?

sireeshakanneganti112

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Article Tags :

C++ Programs
C++
STL
cpp-vector
cpp-set
CPP Examples

Practice Tags :

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