Compilare: user.cpp: In function ‘int main()’: user.cpp:107:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0 ; i < G[nod].size() ; ++i ) ^ user.cpp:87:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d", &n, &m ); ^ user.cpp:91:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d%d", &a, &b, &c ); ^