Compilare: user.cpp: In function ‘void bellmanfordfast()’: user.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<u[x].size();i++) ~^~~~~~~~~~~~ user.cpp: In function ‘void citire()’: user.cpp:16:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i %i",&n,&m); ^ user.cpp:19:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i %i %i",&a,&b,&c); ^