Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:61:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < G[nod].size() ; i ++ ) ^ user.cpp: In function ‘void Read()’: user.cpp:36:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d" , &n , &m ); ^ user.cpp:40:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d%d" , &x , &y , &c ); ^ user.cpp: In function ‘int main()’: user.cpp:81:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(IN,"r",stdin); ^ user.cpp:82:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(OUT,"w",stdout); ^