Find Maximum and Minimum element in a Set in C++ STL

Given a Set, the task is to find the maximum and minimum element of this set in C++ STL.

Examples:

Input: set={1, 6, 15, 10, 5}
Output: max = 15, min = 1

Input: set={10, 20, 30, 40, 50, 60}
Output: max = 60, min = 10

• Using set.begin() and set.end() methods

  Approach: Elements in a set are stored in sorted order. So the minimum element of the set will reside in the first element and the maximum element in the last element. Therefore, this first and last element can be fetched with the help of set.begin() and set.end() methods respectively.

  Program:

  filter_none

  edit
  close

  play_arrow

  link
  brightness_4
  code

  #include <bits/stdc++.h> using namespace std;    // Function to print the set void printSet(set<int> my_set) {        // Print the set     cout << "Set: ";     for (auto i : my_set)         cout << i << " ";        cout << '\n'; }    // Function to find the maximum element int findMax(set<int> my_set) {        // Get the maximum element     int max_element;     if (!my_set.empty())         max_element = *my_set.end();        // return the maximum element     return max_element; }    // Function to find the minimum element int findMin(set<int> my_set) {        // Get the minimum element     int min_element;     if (!my_set.empty())         min_element = *my_set.begin();        // return the minimum element     return min_element; }    int main() {        // Get the set     set<int> my_set;        // Add the elements in the set     my_set.insert(1);     my_set.insert(6);     my_set.insert(15);     my_set.insert(10);     my_set.insert(5);        // Print the set     printSet(my_set);        // Get the minimum element     cout << "Minimum element: "          << findMin(my_set)          << endl;        // Get the maximum element     cout << "Maximum element: "          << findMax(my_set)          << endl; }

  chevron_right

  filter_none

  Output:

  
  
  

  Set: 1 5 6 10 15 
  Minimum element: 1
  Maximum element: 5
  

• Using set.rbegin() and set.rend() methods

  Approach: Elements in a set are stored in sorted order. So the minimum element of the set will reside in the first element and the maximum element in the last element. Therefore, this first and last element can be fetched with the help of set.rend() and set.rbegin() methods respectively.

  Program:

  filter_none

  edit
  close

  play_arrow

  link
  brightness_4
  code

  #include <bits/stdc++.h> using namespace std;    // Function to print the set void printSet(set<int> my_set) {        // Print the set     cout << "Set: ";     for (auto i : my_set)         cout << i << " ";        cout << '\n'; }    // Function to find the maximum element int findMax(set<int> my_set) {        // Get the maximum element     int max_element;     if (!my_set.empty())         max_element = *my_set.rbegin();        // return the maximum element     return max_element; }    // Function to find the minimum element int findMin(set<int> my_set) {        // Get the minimum element     int min_element;     if (!my_set.empty())         min_element = *(--my_set.rend());        // return the minimum element     return min_element; }    int main() {        // Get the set     set<int> my_set;        // Add the elements in the set     my_set.insert(1);     my_set.insert(6);     my_set.insert(15);     my_set.insert(10);     my_set.insert(5);        // Print the set     printSet(my_set);        // Get the minimum element     cout << "Minimum element: "          << findMin(my_set)          << endl;        // Get the maximum element     cout << "Maximum element: "          << findMax(my_set)          << endl; }

  chevron_right

  filter_none

  Output:

  Set: 1 5 6 10 15 
  Minimum element: 1
  Maximum element: 15
  




My Personal Notes arrow_drop_up
Save

Recommended Posts:

• How to find the maximum element of a Vector using STL in C++?
• How to find the maximum element of an Array using STL in C++?
• Array element with minimum sum of absolute differences
• Maximum Unique Element in every subarray of size K
• Queries to add, remove and return the difference of maximum and minimum.
• Rearrange a given list such that it consists of alternating minimum maximum elements
• Minimum and maximum node that lies in the path connecting two nodes in a Binary Tree
• Find the element having different frequency than other array elements
• Find sum of a number and its maximum prime factor
• Find maximum among all right nodes in Binary Tree
• Find k maximum elements of array in original order
• Replace every element of the array by its previous element
• Find the character in first string that is present at minimum index in second string
• Replace every element of the array by its next element
• How to delete last element from a map in C++

---


Bhashkar_P
Check out this Author's contributed articles.

---

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.