Binary search is a classic algorithm for finding an item in a sorted array. However, when working with a `std::priority_queue` in C++, you cannot directly perform a binary search since it does not provide random access to its elements. Instead, you can convert the priority queue into a sorted array or use a different approach.
Here's an example of how to simulate binary search using sorting with `std::priority_queue`:
#include
#include
#include
#include
int main() {
std::priority_queue maxHeap;
// Inserting elements into the priority queue
maxHeap.push(30);
maxHeap.push(10);
maxHeap.push(20);
// Extract elements into a vector
std::vector sortedElements;
while (!maxHeap.empty()) {
sortedElements.push_back(maxHeap.top());
maxHeap.pop();
}
// Now sortedElements is sorted in descending order
std::sort(sortedElements.begin(), sortedElements.end());
// Binary search
int target = 20;
bool found = std::binary_search(sortedElements.begin(), sortedElements.end(), target);
if (found) {
std::cout << target << " found in the queue." << std::endl;
} else {
std::cout << target << " not found in the queue." << std::endl;
}
return 0;
}
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