Category : priority-queue

I am getting this error "libc++abi.dylib: terminating with uncaught exception of type std::out_of_range: vector" for my heapifyDown() I believe. This is the cpp for my priorityqueue. I call heapifyDown() in my removeMin() so I made some changes there but my heapifyDown() seems fine to me. Can anyone help me troubleshoot this? #include <iostream> #include "json.hpp" ..

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My friend was asked in an interview: "When we create a priority queue with the default ordering std::less<T>, we can just write: std::priority_queue<int> q; but when we create one with custom comparator, say, std::greater<T>, we have to instead, write: std::priority_queue<int, std::vector, std::greater > q2; In your opinion, what is the need to specify the container ..

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#include <iostream> #include <iostream> using namespace std; const int size=5; class Queue { int items[size]; int front,rear; public: Queue() { front=0; rear=-1; } //primitive functions void insert(int x) { items[++rear]=x; } int remove() { return items[front++]; } // ======================================================= void pri_insert(int x) { int temp; if(x>=items[rear]) { insert(x); } else { insert(x); for(front = 0 ..

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