Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:21:29: 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:29:25: 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:37:8: warning: unused variable ‘i’ [-Wunused-variable] { int i,j,y; ^ user.cpp:37:10: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,y; ^ user.cpp: In function ‘void Euler(int)’: user.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<res.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:102:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++) ^