Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:58:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < tpl[u].vecini.size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:83:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in", "rt", stdin); ^ user.cpp:84:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out", "wt", stdout); ^