Compilare: user.cpp: In function ‘int lcp(int, int)’: user.cpp:60:9: warning: unused variable ‘k’ [-Wunused-variable] int k,ret=0; ^ user.cpp: In function ‘void Solve()’: user.cpp:111:27: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<ans<<"\n"<<l<<" "<<r<<"\n"; ^ user.cpp:111:19: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<ans<<"\n"<<l<<" "<<r<<"\n"; ^