Compilare: user.cpp: In function ‘bool bellman_ford(Graph*, int)’: user.cpp:92:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] d[i] = i == startNode ? 0 : Inf, ^ user.cpp: In function ‘int main()’: user.cpp:121:37: 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:122:39: 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); ^