Compilare: user.cpp: In function ‘void HeapDown(int)’: user.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (node * 2 + 1 < minHeap.size()) ^ user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (node * 2 + 2 < minHeap.size() && minHeap[node * 2 + 1].first > minHeap[node * 2 + 2].first) ^ user.cpp: In function ‘int Remove(int)’: user.cpp:41:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (added[index] != minHeap.size()) { ^ user.cpp:45:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:53:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < minHeap.size(); i++) ^ user.cpp:56:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < minHeap.size(); i++) ^ user.cpp:59:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < minHeap.size(); i++) ^ user.cpp:49:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heapuri.out", "w", stdout); ^