Compilare: main.cpp: In function 'void dfs(int, char, char*)': main.cpp:27:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pasi==strlen(cuv)) ~~~~^~~~~~~~~~~~~ main.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:103:9: warning: unused variable 'i' [-Wunused-variable] int i,j; ^ main.cpp:103:11: warning: unused variable 'j' [-Wunused-variable] int i,j; ^