Compilare: main.cpp: In function 'int main()': main.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) { ~^~~~~~~~~~~~~~ main.cpp:65:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) { ~^~~~~~~~~~~~~~ main.cpp:57:13: warning: unused variable 'atn' [-Wunused-variable] int atn=0; ^~~