Does STL priority queue allow duplicate values?
Yes, in C++ priority_queue, we may have duplicate values.
// C++ program to demonstrate that duplicate // values are allowed in a priority queue // (with maximum value at the top) #include <bits/stdc++.h> using namespace std; int main() { priority_queue<int> pq; pq.push(30); pq.push(5); pq.push(30); cout << pq.top() << " "; pq.pop(); cout << pq.top() << " "; pq.pop(); return 0; } |
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Output:
30 30
// C++ program to demonstrate that duplicate // values are allowed in a priority queue // (with minimum value at the top) #include <bits/stdc++.h> using namespace std; int main() { priority_queue<int> pq; pq.push(5); pq.push(5); pq.push(5); cout << pq.top() << " "; pq.pop(); cout << pq.top() << " "; pq.pop(); cout << pq.top() << " "; pq.pop(); return 0; } |
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Output:
5 5 5
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