Compilare: user.cpp: In function ‘void RadixSort()’: user.cpp:42:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<X[k].size();j++) ^ user.cpp:56:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<X[k].size();j++) ^ user.cpp: In function ‘int lcp(int, int)’: user.cpp:92:9: warning: unused variable ‘k’ [-Wunused-variable] int k,ret=0; ^ user.cpp: In function ‘void Solve()’: user.cpp:143:27: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<ans<<"\n"<<l<<" "<<r<<"\n"; ^ user.cpp:143:19: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<ans<<"\n"<<l<<" "<<r<<"\n"; ^