Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:45:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘void solve()’: user.cpp:59:9: warning: variable ‘m1x’ set but not used [-Wunused-but-set-variable] int m1x,m2x,m3x,m1y,m2y,m3y; ^ user.cpp:60:9: warning: unused variable ‘x1’ [-Wunused-variable] int x1,x2,x3,caz; ^ user.cpp:60:12: warning: unused variable ‘x2’ [-Wunused-variable] int x1,x2,x3,caz; ^ user.cpp:60:15: warning: unused variable ‘x3’ [-Wunused-variable] int x1,x2,x3,caz; ^