Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:25:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Del(int, int)’: user.cpp:33:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Ciclu(int)’: user.cpp:41:8: warning: unused variable ‘i’ [-Wunused-variable] { int i,j,y; ^ user.cpp:41:10: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,y; ^ user.cpp: In function ‘int main()’: user.cpp:106:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++) ^ user.cpp:80:28: 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:83:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] { fscanf(f,"%d %d",&x,&y); ^