Compilare: main.cpp: In function 'bool accepta(std::vector<std::unordered_multimap<char, int> >&, std::__cxx11::string)': main.cpp:338:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:333:9: warning: unused variable 'q' [-Wunused-variable] int q[N*Nmax]={start}; ^ main.cpp: In function 'void dfs(int, int, std::__cxx11::string)': main.cpp:384:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==s.size()) ~^~~~~~~~~~ main.cpp:391:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int index=0;index<mat[x].size();++index) ~~~~~^~~~~~~~~~~~~~