Compilare: user.cpp: In function ‘void ft()’: user.cpp:78:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ctc.size();i++) ^ user.cpp:80:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr<ctc[i].size()) ^ user.cpp: In function ‘int main()’: user.cpp:120:15: warning: unused variable ‘j’ [-Wunused-variable] int a,b,i,j,m; ^ user.cpp: In function ‘void ft()’: user.cpp:87:23: warning: ‘ind’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(auto x:ctc[ind]) bif[x]=1; ^