Compilare: user.cpp: In function ‘int main()’: user.cpp:36:13: warning: unused variable ‘k’ [-Wunused-variable] int n,m,k; ^ user.cpp:45:16: warning: variable ‘tata’ set but not used [-Wunused-but-set-variable] int d[n+1],tata[n+1]; ^ user.cpp:71:15: warning: ‘start’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[start]=0; ^