Compilare: main.cpp: In member function 'void Heap::down(int)': main.cpp:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( 2*i< heap.size() && heap[smallest].first>heap[2*i].first) ~~~^~~~~~~~~~~~~ main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(2*i+1 < heap.size() &&heap[smallest].first> heap[2*i+1].first) ~~~~~~^~~~~~~~~~~~~ main.cpp: In member function 'void Heap::erase_ord(int)': main.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(auto i=1;i<heap.size();i++) ~^~~~~~~~~~~~ main.cpp: In member function 'void Heap::afis()': main.cpp:62:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(auto &i:heap) ^~~ main.cpp:64:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cout<<"End afisare\n"; ^~~~