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map equal_range() in C++ STL
In this tutorial, we will be discussing a program to understand map equal_range in C++ STL.
This function returns a pair of iterators that bounds the range of the container in which the key equivalent to the given parameter resides.
Example
#include <bits/stdc++.h> using namespace std; int main() { //initializing container map<int, int> mp; mp.insert({ 4, 30 }); mp.insert({ 1, 40 }); mp.insert({ 6, 60 }); pair<map<int, int>::iterator, map<int, int>::iterator> it; it = mp.equal_range(1); cout << "The lower bound is " << it.first->first<< ":" << it.first->second; cout << "\nThe upper bound is "<< it.second->first<< ":" << it.second->second; return 0; }
Output
The lower bound is 1:40 The upper bound is 4:30
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