Compilare: user.cpp: In function ‘int main()’: user.cpp:23:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘void dfs_initial(int)’: user.cpp:54:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<org[k].size(); i++) ^ user.cpp: In function ‘void dfs_transpus(int)’: user.cpp:63:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<trs[k].size(); i++) ^