Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[nod].size(); ++ i){ ^ user.cpp: In function ‘int main(int, const char**)’: user.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ctc.size(); ++ i){ ^ user.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ctc[i].size(); ++ j) ^