Compilare: user.cpp: In function ‘char convert1(int)’: user.cpp:13:10: warning: unused variable ‘y’ [-Wunused-variable] char y; ^ user.cpp: In function ‘void dfs(int)’: user.cpp:32:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<l[nod].size();i++){ ^ user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<l[nod].size();i++) { ^ user.cpp: In function ‘int main()’: user.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<l[x].size();i++) { ^