Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:39:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i ++) ^ user.cpp: In function ‘void euler()’: user.cpp:84:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < g2[from].size();i ++) ^ user.cpp: In function ‘int main()’: user.cpp:110:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&m); ^ user.cpp:113:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&e[i].from,&e[i].to); ^