Compilare: user.cpp: In function ‘int main()’: user.cpp:38:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] i < graph[node].size(); ^ user.cpp:34:13: warning: unused variable ‘cdist’ [-Wunused-variable] int cdist = nodes.begin()->first; ^ user.cpp:13:39: 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:14:41: 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); ^