Compilare: user.cpp: In member function ‘Edge EdgeHeap::decapitate()’: user.cpp:57:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((indice << 1) + 1 < m_heap.size() && ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((indice << 1) < m_heap.size()) ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp:65:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if((indice << 1) < m_heap.size()) ^~ user.cpp:73:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ return result; ^~~~~~ user.cpp: In function ‘int main()’: user.cpp:92:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges[1].size(); ++i) ~~^~~~~~~~~~~~~~~~~ user.cpp:106:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges[nextNode].size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:79:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in", "r", stdin); ^ user.cpp:80:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out", "w", stdout); ^