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#include <iostream>#include <vector>#include <iterator>#include <algorithm>template <class T, class C>class PQueue {  public:    std::vector<T> heap;    int heap_size;    C comp;    PQueue(){      heap_size=0;    }    int insert(T u) {      heap[heap_size]=u;      return 1;    }};class Comp {  public:    int i; };int main( int argc, char **argv ){  PQueue<int,Comp> q();  q.insert(2);  return 1;}